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php随笔1-php图片处理，_PHP教程

WBOY
Libérer： 2016-07-12 09:07:41
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php随笔1-php图片处理，

php图片处理的知识内容

upload_image.php:

<span><!</span><span>DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"</span><span>></span>
<span><</span><span>html </span><span>xmlns</span><span>="http://www.w3.org/1999/xhtml"</span><span>></span>
<span><</span><span>head</span><span>></span>
<span><</span><span>meta </span><span>http-equiv</span><span>="Content-Type"</span><span> content</span><span>="text/html; charset=gb2312"</span> <span>/></span>
 <span><</span><span>title</span><span>></span>图片上传页<span></</span><span>title</span><span>></span>
 <span><</span><span>style </span><span>type</span><span>="text/css"</span><span>></span><span>
.file-box</span><span>{</span><span> position</span><span>:</span><span>relative</span><span>;</span><span>width</span><span>:</span><span>340px</span><span>}</span><span> 
.txt</span><span>{</span><span> height</span><span>:</span><span>22px</span><span>;</span><span> border</span><span>:</span><span>1px solid #cdcdcd</span><span>;</span><span> width</span><span>:</span><span>200px</span><span>;</span><span>border-right</span><span>:</span><span>none</span><span>;</span><span>}</span><span> 
.btn</span><span>{</span><span> background-color</span><span>:</span><span>#FFF</span><span>;</span><span> border</span><span>:</span><span>1px solid #CDCDCD</span><span>;</span><span>height</span><span>:</span><span>26px</span><span>;</span><span> width</span><span>:</span><span>70px</span><span>;</span><span>}</span><span> 
.file</span><span>{</span><span> position</span><span>:</span><span>absolute</span><span>;</span><span> top</span><span>:</span><span>0</span><span>;</span><span> right</span><span>:</span><span>80px</span><span>;</span><span> height</span><span>:</span><span>24px</span><span>;</span><span> filter</span><span>:</span><span>alpha(opacity:0)</span><span>;</span><span>opacity</span><span>:</span><span> 0</span><span>;</span><span>width</span><span>:</span><span>260px </span><span>}</span>
 <span></</span><span>style</span><span>></span>
 <span><</span><span>script  </span><span>type</span><span>="text/javascript"</span> <span>></span>
 <span>//</span><span>JS获取路径 ---成功</span>
    <span>function</span><span> change()<br />　　{
          </span><span>var</span><span> pic</span><span>=</span><span>document.getElementById(</span><span>'</span><span>pic</span><span>'</span><span>);
          </span><span>var</span><span> file</span><span>=</span><span>document.getElementById(</span><span>'</span><span>fileField</span><span>'</span><span>);
          pic.src</span><span>=</span><span>file.value;
          </span><span>if</span><span>(file.files){
            </span><span>if</span><span>(file.files.item(</span><span>0</span><span>)){
            </span><span>//</span><span>src = window.URL.createObjectURL(fileObj.files[0]);</span>
<span>            url</span><span>=</span><span>window.URL.createObjectURL(file.files.item(</span><span>0</span><span>));  
             document.getElementById(</span><span>'</span><span>textfield</span><span>'</span><span>).value </span><span>=</span><span> pic.src ;
             pic.src</span><span>=</span><span>url;
            }
          }
  　} 
 </span><span></</span><span>script</span><span>></span> 
<span></</span><span>head</span><span>></span>

<span><</span><span>body</span><span>></span>
<span><</span><span>form </span><span>action</span><span>="check_image.php"</span><span> method</span><span>="post"</span><span> enctype</span><span>="multipart/form-data"</span><span>></span>
            <span><</span><span>table </span><span>border</span><span>="1"</span><span>></span>
                <span><</span><span>tr</span><span>></span>
                    <span><</span><span>td</span><span>></span>上传人名称：<span></</span><span>td</span><span>></span>
                    <span><</span><span>td</span><span>><</span><span>input </span><span>type</span><span>="text"</span><span> class</span><span>='txt' </span><span>name</span><span>="username"</span> <span>/></</span><span>td</span><span>></span>
                <span></</span><span>tr</span><span>></span>
                <span><</span><span>tr</span><span>></span>
                    <span><</span><span>td</span><span>></span>*上传图片：<span></</span><span>td</span><span>></span>
                    <span><</span><span>td</span><span>><</span><span>div </span><span>class</span><span>="file-box"</span><span>><</span><span>input </span><span>type</span><span>='text' </span><span>name</span><span>='textfield' </span><span>id</span><span>='textfield' </span><span>class</span><span>='txt' </span><span>/><</span><span>input </span><span>type</span><span>='button' </span><span>class</span><span>='btn' </span><span>value</span><span>='浏览...' </span><span>/><</span><span>br </span><span>/></span>
                        <span><</span><span>input </span><span>type</span><span>="file"</span><span> name</span><span>="uploadfile"</span><span> class</span><span>="file"</span><span> id</span><span>="fileField"</span><span> size</span><span>="28"</span><span> onchange</span><span>="change();"</span> <span>/></span> 
                        <span><</span><span>input </span><span>type</span><span>="hidden"</span><span> id</span><span>="theFilePath"</span><span> name</span><span>="theFilePath"</span><span> value</span><span>=""</span><span>></span>
                    <span></</span><span>div</span><span>></span>
                    <span></</span><span>td</span><span>></span>
                <span></</span><span>tr</span><span>></span>
                <span><</span><span>tr</span><span>></span>
                    <span><</span><span>td </span><span>colspan</span><span>="2"</span><span>></span>
                        <span><</span><span>small</span><span>><</span><span>em</span><span>></span> * 可接受的图像格式：GIF，JPG、JPEG和PNG。上传后图片会变为1280X960大小。<span></</span><span>em</span><span>></</span><span>small</span><span>></span>
                    <span></</span><span>td</span><span>></span>
                <span></</span><span>tr</span><span>></span>
                <span><</span><span>tr</span><span>></span>
                    <span><</span><span>td</span><span>></span>图片标题：<span></</span><span>td</span><span>></span>
                    <span><</span><span>td</span><span>><</span><span>input </span><span>type</span><span>="text"</span><span> class</span><span>='txt' </span><span>name</span><span>="caption"</span><span>/></</span><span>td</span><span>></span>
                <span></</span><span>tr</span><span>></span>
                <span><</span><span>tr</span><span>></span>
                    <span><</span><span>td </span><span>colspan</span><span>="2"</span><span> style</span><span>="text-align:center;"</span><span>></span>
                        <span><</span><span>input </span><span>type</span><span>="submit"</span><span> name</span><span>="submit"</span><span> value</span><span>="Upload"</span><span>  class</span><span>='btn' </span><span>/></span>
                    <span></</span><span>td</span><span>></span>
                <span></</span><span>tr</span><span>></span>
            <span></</span><span>table</span><span>></span>
            <span><</span><span>img </span><span>src</span><span>=""</span><span>  name</span><span>="pic"</span><span> id</span><span>="pic"</span> <span>/></span> <span><</span><span>br </span><span>/></span>
        <span></</span><span>form</span><span>></span>
<span></</span><span>body</span><span>></span>
<span></</span><span>html</span><span>></span>
Copier après la connexion

check_image.php 集合图片上传，MySQL数据库保存，图片放大至1280X960，图片加文字，图片PS处理，图片缩略图，图片打LOGO水印。功能集合强大。

<?<span>php     
    </span><span>//</span><span>session</span>
    <span>session_start</span><span>();
    </span><span>if</span>(<span>$_POST</span>['submit'] == 'Upload'<span>)
    {
            </span><span>if</span>(<span>$_FILES</span>['uploadfile']['error'] !=<span> UPLOAD_ERR_OK)
            {
                </span><span>switch</span>(<span>$_FILES</span>['uploadfile']['error'<span>])
                {
                    </span><span>case</span> UPLOAD_ERR_INI_SIZE: <span>//</span><span>其值为 1，上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值</span>
                        <span>die</span>('上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值'<span>);
                    </span><span>break</span><span>;
                    </span><span>case</span> UPLOAD_ERR_FORM_SIZE: <span>//</span><span>其值为 2，上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值</span>
                        <span>die</span>('上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值'<span>);
                    </span><span>break</span><span>;
                    </span><span>case</span> UPLOAD_ERR_PARTIAL: <span>//</span><span>其值为 3，文件只有部分被上传</span>
                        <span>die</span>('文件只有部分被上传'<span>);
                    </span><span>break</span><span>;
                    </span><span>case</span> UPLOAD_ERR_NO_FILE: <span>//</span><span>其值为 4，没有文件被上传</span>
                        <span>die</span>('没有文件被上传'<span>);
                    </span><span>break</span><span>;
                    </span><span>case</span> UPLOAD_ERR_NO_TMP_DIR: <span>//</span><span>其值为 6，找不到临时文件夹</span>
                        <span>die</span>('找不到临时文件夹'<span>);
                    </span><span>break</span><span>;
                    </span><span>case</span> UPLOAD_ERR_CANT_WRITE: <span>//</span><span>其值为 7，文件写入失败</span>
                        <span>die</span>('文件写入失败'<span>);
                    </span><span>break</span><span>;
                    </span><span>case</span> UPLOAD_ERR_EXTENSION: <span>//</span><span>其他异常</span>
                        <span>die</span>('其他异常'<span>);
                    </span><span>break</span><span>;
                }
            }
        </span><span>//</span><span>判断图片的后缀</span>
        <span>switch</span>(<span>$type</span><span>)
        {
            </span><span>case</span> IMAGETYPE_GIF:
                <span>$ext</span> = '.gif'<span>;
            </span><span>break</span><span>;
            </span><span>case</span> IMAGETYPE_JPEG:
                <span>$ext</span> = '.jpg'<span>;
            </span><span>break</span><span>;    
            </span><span>case</span> IMAGETYPE_PNG:
                <span>$ext</span> = '.png'<span>;
            </span><span>break</span><span>;    
            </span><span>default</span>    :
                <span>die</span>('您上传的文件不支持的文件类型。'<span>);
        }
        </span><span>//</span><span>关键位置-取出文件后缀</span>
        <span>$_SESSION</span>['ext'] = <span>$ext</span><span>;
    }
    
    </span><span>/*</span><span>
    //改变图像的大小为1280x960的方法
    function resizepic($imgsrc,$imagename,$toimgwidth,$toimgheigth)
    {
        //$imgsrc：图片路径 $imgname: 图片保存的名称 $toimgwidth: 图片最终的宽度 $toimgheigth: 图片最终的高度
        $arr = getimagesize($imgsrc);
        $imgWidth =  $toimgwidth;
        $imgHeigth =  $toimgheigth;
        if($_SESSION['ext'] == '.jpg')
        {
             header('Content-Type:image/jpeg');
             $imgSrc = imagecreatefromjpeg($imgsrc);
        }
        if($_SESSION['ext'] == '.png')
        {
            header('Content-Type:image/png');
            $imgSrc = imagecreatefrompng($imgsrc);
        }
        if($_SESSION['ext'] == '.gif')
        {
            header('Content-Type:image/gif');
            $imgSrc = imagecreatefromgif($imgsrc);
        }
        
        $image = imagecreatetruecolor($imgWidth, $imgHeigth);
        imagecopyresampled($image,$imgSrc,0,0,0,0,$imgWidth,$imgHeigth,$arr[0],$arr[1]);
        if($_SESSION['ext'] == '.jpg')
        {
            imagejpeg($image,$dir.'/'.$imagename);
        }
        if($_SESSION['ext'] == '.png')
        {
            imagepng($image,$dir.'/'.$imagename);
        }
        if($_SESSION['ext'] == '.gif')
        {
            imagegif($image,$dir.'/'.$imagename);
        }
        //销毁由url生成的图片
        imagedestroy($image);
    }
    </span><span>*/</span>
    

    <span>//</span><span>创建moviesite数据库--MySQL</span>
    <span>$coon</span> = <span>mysql_connect</span>("localhost","root","lifu") or <span>die</span>('不能连接到数据库'<span>);
    </span><span>if</span> (!<span>$coon</span><span>)
      {
          </span><span>die</span>('无法连接: ' . <span>mysql_error</span><span>());
      }
    
    </span><span>if</span> (<span>mysql_query</span>("CREATE DATABASE if not exists moviesite",<span>$coon</span>))    <span>//</span><span>如果没有就创建数据库</span>
<span>      {
          </span><span>echo</span> "数据库创建成功<br>"<span>;
      }
    </span><span>else</span><span>
      {
          </span><span>echo</span> "数据库创建错误: " . <span>mysql_error</span><span>();
      }
    </span><span>//</span><span> 创建images表</span>
    <span>mysql_select_db</span>("moviesite", <span>$coon</span><span>);
    </span><span>//</span><span>如果没有就创建表</span>
    <span>$sql</span> = "<span>CREATE TABLE if not exists images                       
    (
        image_id int NOT NULL AUTO_INCREMENT, 
        PRIMARY KEY(image_id),
        image_caption varchar(15), 
        image_username varchar(15),
        image_filename varchar(15),
        image_date  datetime
    )</span>"<span>;
    
    </span><span>mysql_query</span>(<span>$sql</span>,<span>$coon</span><span>);
    </span><span>mysql_close</span>(<span>$coon</span><span>);
    
    </span><span>//</span><span>修改图片效果</span>
    <span>$db</span> = <span>mysql_connect</span>('localhost','root','lifu') or <span>die</span>('不能连接到数据库'<span>);
    </span><span>mysql_select_db</span>('moviesite',<span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));

    </span><span>//</span><span>上传文件的路径</span>
    <span>$dir</span> = 'D:\phpStudy\WWW\loadimages\images'<span>;
    
    </span><span>//</span><span>缩略图的路径</span>
    <span>$thumbdir</span> = 'D:\phpStudy\WWW\loadimages\images\thumbs'<span>;
    
    </span><span>//</span><span>设置环境变量</span>
    <span>putenv</span>('GDFONTPATH='.'C:\Windows\Fonts'<span>);
    </span><span>$font</span> = "C:\Windows\Fonts\arial.ttf"<span>;
    
    </span><span>//</span><span>upload_image.php页面传递过来的参数，如果是上传图片</span>
    <span>if</span>(<span>$_POST</span>['submit'] == 'Upload'<span>)
    {        </span><span>/*</span><span>代码重复
            if($_FILES['uploadfile']['error'] != UPLOAD_ERR_OK)
            {
                switch($_FILES['uploadfile']['error'])
                {
                    case UPLOAD_ERR_INI_SIZE: //其值为 1，上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值
                        die('上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值');
                    break;
                    case UPLOAD_ERR_FORM_SIZE: //其值为 2，上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值
                        die('上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值');
                    break;
                    case UPLOAD_ERR_PARTIAL: //其值为 3，文件只有部分被上传
                        die('文件只有部分被上传');
                    break;
                    case UPLOAD_ERR_NO_FILE: //其值为 4，没有文件被上传
                        die('没有文件被上传');
                    break;
                    case UPLOAD_ERR_NO_TMP_DIR: //其值为 6，找不到临时文件夹
                        die('找不到临时文件夹');
                    break;
                    case UPLOAD_ERR_CANT_WRITE: //其值为 7，文件写入失败
                        die('文件写入失败');
                    break;
                    case UPLOAD_ERR_EXTENSION: //其他异常
                        die('其他异常');
                    break;
                }
            }
            </span><span>*/</span>
        
        <span>$image_caption</span> = <span>$_POST</span>['caption'<span>];
        </span><span>$image_username</span> = <span>$_POST</span>['username'<span>];
        </span><span>$image_date</span> = <span>date</span>('Y-m-D'<span>);
        </span><span>/*</span><span>getimagesize方法返回一个数组，
        $width : 索引 0 包含图像宽度的像素值，
        $height : 索引 1 包含图像高度的像素值，
        $type : 索引 2 是图像类型的标记：
        = GIF，2 = JPG， 3 = PNG， 4 = SWF， 5 = PSD， 6 = BMP， 
        = TIFF(intel byte order)，8 = TIFF(motorola byte order)，
        = JPC，10 = JP2，11 = JPX，12 = JB2，13 = SWC，14 = IFF，15 = WBMP，16 = XBM，
        $attr : 索引 3 是文本字符串，内容为&ldquo;height="yyy" width="xxx"&rdquo;，可直接用于 IMG 标记
        </span><span>*/</span>
        
        <span>list</span>(<span>$width</span>,<span>$height</span>,<span>$type</span>,<span>$attr</span>) = <span>getimagesize</span>(<span>$_FILES</span>['uploadfile']['tmp_name'<span>]);
        
        </span><span>//</span><span>imagecreatefromgXXX方法从一个url路径中创建一个新的图片</span>
        <span>switch</span>(<span>$type</span><span>)
        {
            </span><span>case</span> IMAGETYPE_GIF:
                <span>$image</span> = imagecreatefromgif(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>('你上传的文件是不支持的文件类型'<span>);
                </span><span>$ext</span> = '.gif'<span>;
                </span><span>$array</span> = <span>getimagesize</span>(<span>$_FILES</span>['uploadfile']['tmp_name'<span>]);
            </span><span>break</span><span>;
            </span><span>case</span> IMAGETYPE_JPEG:
                <span>$image</span> = imagecreatefromjpeg(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>('你上传的文件是不支持的文件类型'<span>);
                </span><span>$ext</span> = '.jpg'<span>;
                </span><span>$array</span> = <span>getimagesize</span>(<span>$_FILES</span>['uploadfile']['tmp_name'<span>]);
            </span><span>break</span><span>;    
            </span><span>case</span> IMAGETYPE_PNG:
                <span>$image</span> = imagecreatefrompng(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>('你上传的文件是不支持的文件类型'<span>);
                </span><span>$ext</span> = '.png'<span>;
                </span><span>$array</span> = <span>getimagesize</span>(<span>$_FILES</span>['uploadfile']['tmp_name'<span>]);
            </span><span>break</span><span>;    
            </span><span>default</span>    :
                <span>die</span>('您上传的文件不支持的文件类型。'<span>);
        }
        
        
        </span><span>//</span><span>将图片改为1280X960
        //新建一个指定大小的真彩色图像big</span>
        <span>$big</span> = imagecreatetruecolor(1280, 960<span>);
        </span><span>//</span><span>重采样拷贝部分图像并调整大小为1280X960</span>
        imagecopyresampled(<span>$big</span>, <span>$image</span>, 0, 0, 0, 0, 1280, 960, <span>$array</span>[0], <span>$array</span>[1<span>]);
        
        
        </span><span>$query</span> = 'insert into images(image_caption,image_username,image_date) values ("'.<span>$image_caption</span>.'","'.<span>$image_username</span>.'",now())'<span>;
        </span><span>mysql_query</span>(<span>$query</span> , <span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));
        </span><span>$last_id</span> = <span>mysql_insert_id</span><span>();
        </span><span>//</span><span>用写入的id作为图片的名字，避免同名的文件存放在同一目录中</span>
        <span>$imagename</span> = <span>$last_id</span>.<span>$ext</span><span>;
        </span><span>$image_id</span> = <span>$last_id</span><span>;
        
        </span><span>$query</span> = 'update images set image_filename="'.<span>$imagename</span>.'" where image_id='.<span>$last_id</span><span>;
        </span><span>mysql_query</span>(<span>$query</span> , <span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));

        </span><span>//</span><span>有url指定的图片创建图片并保存到指定目录</span>
        <span>switch</span>(<span>$type</span><span>)
        {
            </span><span>case</span> IMAGETYPE_GIF:<span>
                imagegif(</span><span>$big</span>,<span>$dir</span>.'/'.<span>$imagename</span><span>);
            </span><span>break</span><span>;
            </span><span>case</span> IMAGETYPE_JPEG:<span>
                imagejpeg(</span><span>$big</span>,<span>$dir</span>.'/'.<span>$imagename</span><span>);
            </span><span>break</span><span>;
            </span><span>case</span> IMAGETYPE_PNG:<span>
                imagepng(</span><span>$big</span>,<span>$dir</span>.'/'.<span>$imagename</span><span>);
            </span><span>break</span><span>;
        }
        </span><span>//</span><span>销毁由url生成的图片</span>
        imagedestroy(<span>$big</span><span>);
        imagedestroy(</span><span>$image</span><span>);
        
    }
    </span><span>else</span>  <span>//</span><span>如果图片已经上传，则从数据库中取图片名字</span>
<span>    {    
        </span><span>$query</span> = 'select image_id,image_caption,image_username,image_date from images where image_id='.<span>$_POST</span>['id'<span>];
        </span><span>$result</span> = <span>mysql_query</span>(<span>$query</span>,<span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));
        </span><span>//</span><span>将结果集转换成关联数据，再将关联数组的键名当作变量名，值作为变量的值。</span>
        <span>extract</span>(<span>mysql_fetch_assoc</span>(<span>$result</span><span>));
        </span><span>list</span>(<span>$width</span>,<span>$height</span>,<span>$type</span>,<span>$attr</span>) = <span>getimagesize</span>(<span>$dir</span>.'/'.<span>$image_id</span>.<span>$_SESSION</span>['ext'<span>]);
    }

    </span><span>//</span><span>如果是保存图片</span>
    <span>if</span>(<span>$_POST</span>['submit'] == 'Save'<span>)
    {    
        </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['id']) && <span>ctype_digit</span>(<span>$_POST</span>['id']) && <span>file_exists</span>(<span>$dir</span>.'/'.<span>$_POST</span>['id'].<span>$_SESSION</span>['ext'<span>]))
        {
            </span><span>if</span>(<span>$_SESSION</span>['ext'] == '.jpg'<span>)
            {
                </span><span>$image</span> = imagecreatefromjpeg(<span>$dir</span>.'/'.<span>$_POST</span>['id'].<span>$_SESSION</span>['ext'<span>]);
            }
            </span><span>if</span>(<span>$_SESSION</span>['ext'] == '.png'<span>)
            {
                </span><span>$image</span> = imagecreatefrompng(<span>$dir</span>.'/'.<span>$_POST</span>['id'].<span>$_SESSION</span>['ext'<span>]);
            }
            </span><span>if</span>(<span>$_SESSION</span>['ext'] == '.gif'<span>)
            {
                </span><span>$image</span> = imagecreatefromgif(<span>$dir</span>.'/'.<span>$_POST</span>['id'].<span>$_SESSION</span>['ext'<span>]);
            }
        }
        </span><span>else</span><span>
        {
            </span><span>die</span>('指定的无效图像'<span>);
        }
        
        
        </span><span>$effect</span> = (<span>isset</span>(<span>$_POST</span>['effect'])) ? <span>$_POST</span>['effect'] : -1<span>;
        
        </span><span>switch</span>(<span>$effect</span><span>)
        {
            </span><span>case</span> IMG_FILTER_NEGATE:<span>
                imagefilter(</span><span>$image</span> , IMG_FILTER_NEGATE);     <span>//</span><span>将图像中所有颜色反转</span>
            <span>break</span><span>;
            </span><span>case</span> IMG_FILTER_GRAYSCALE:<span>
                imagefilter(</span><span>$image</span> , IMG_FILTER_GRAYSCALE);  <span>//</span><span>将图像转换为灰度的</span>
            <span>break</span><span>;
            </span><span>case</span> IMG_FILTER_EMBOSS:<span>
                imagefilter(</span><span>$image</span> , IMG_FILTER_EMBOSS);     <span>//</span><span>使图像浮雕化</span>
            <span>break</span><span>;
            </span><span>case</span> IMG_FILTER_GAUSSIAN_BLUR:<span>
                imagefilter(</span><span>$image</span> , IMG_FILTER_GAUSSIAN_BLUR); <span>//</span><span>用高斯算法模糊图像</span>
            <span>break</span><span>;    
        }
        
        </span><span>//</span><span>图片指定位置打印文字</span>
        <span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>]))
        {    </span><span>/*</span><span>
            array imagettftext ( resource $image , float $size , float $angle , int $x , int $y , int $color , string $fontfile , string $text )
            $image  图像源   $size    字体大小   $angle   逆时针旋转角度   $fontfile  字体类型   $text  文本内容
            </span><span>*/</span><span>
            imagettftext(</span><span>$image</span> , 12 , 0 , 20 , 20 , 0 , <span>$font</span> , <span>$image_caption</span><span>);
        }
        
        </span><span>//</span><span>图片指定位置打LOGO</span>
        <span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_logo'<span>]))
        {
            </span><span>//</span><span>获取水印图片的尺寸并创建水印</span>
            <span>list</span>(<span>$wmk_width</span> , <span>$wmk_height</span>) = <span>getimagesize</span>('images/logo.png'<span>);
            </span><span>//</span><span>$x = ($width-$wmk_width) / 2;
            //$y = ($height-$wmk_height)/2;</span>
            <span>$x</span> = <span>$width</span>-<span>$wmk_width</span><span>;
            </span><span>$y</span> = <span>$height</span>-<span>$wmk_height</span><span>;
            </span><span>$wmk</span> = imagecreatefrompng('images/logo.png'<span>);
            </span><span>//</span><span>把水印图片和原图片合并在一起</span>
            <span>/*</span><span>
            将 wmk 图像中坐标从 0，0 开始，宽度为 $wmk_width，高度为 $wmk_height 的一部分拷贝到 image 图像中坐标为 $x 和 $y 的位置上。
            两图像将根据 pct=20 来决定合并程度，其值范围从 0 到 100。当 pct = 0 时，实际上什么也没做，当为                     
            100 时对于调色板图像本函数和 imagecopy() 完全一样，它对真彩色图像实现了 alpha 透明。
            </span><span>*/</span><span>
            imagecopymerge(</span><span>$image</span> , <span>$wmk</span> , <span>$x</span> , <span>$y</span> , 0 , 0 , <span>$wmk_width</span> , <span>$wmk_height</span> , 20<span>);
            </span><span>//</span><span>清除水印图片</span>
            imagedestroy(<span>$wmk</span><span>);
        }
        
        </span><span>//</span><span>缩略图大小</span>
        <span>$thumb_width</span> = <span>$width</span> * 0.10<span>;
        </span><span>$thumb_height</span> = <span>$height</span> * 0.10<span>;
                       
        </span><span>//</span><span>创建一个缩略图</span>
        <span>$thumb</span> = imagecreatetruecolor(<span>$thumb_width</span>, <span>$thumb_height</span><span>);
        imagecopyresampled(</span><span>$thumb</span>, <span>$image</span>, 0, 0, 0, 0, <span>$thumb_width</span>, <span>$thumb_height</span>, <span>$width</span>, <span>$height</span><span>);
        
        </span><span>//</span><span>保存缩略图</span>
        <span>if</span>(<span>$_SESSION</span>['ext'] == '.jpg'<span>)
        {
            imagejpeg(</span><span>$thumb</span>, <span>$thumbdir</span> . '/' . <span>$_POST</span>['id'] . <span>$_SESSION</span>['ext'], 100<span>);
        }
        </span><span>if</span>(<span>$_SESSION</span>['ext'] == '.png'<span>)
        {</span>
            imagepng(<span>$thumb</span>, <span>$thumbdir</span> . '/' . <span>$_POST</span>['id'] . <span>$_SESSION</span>['ext'<span>]);
        }
        </span><span>if</span>(<span>$_SESSION</span>['ext'] == '.gif'<span>)
        {
            imagegif(</span><span>$thumb</span>, <span>$thumbdir</span> . '/' . <span>$_POST</span>['id'] . <span>$_SESSION</span>['ext'<span>]);
        }
        </span><span>echo</span> "修改好的缩略图：<img  src='"."images/thumbs/" . <span alt="php随笔1-php图片处理，_PHP教程" >$_POST</span>['id'] . <span>$_SESSION</span>['ext']."' alt='' /> <br />"<span>;
        </span><span>//</span><span>清除缩略图</span>
        imagedestroy(<span>$thumb</span><span>);
        
        </span><span>//</span><span>保存原图</span>
        <span>if</span>(<span>$_SESSION</span>['ext'] == '.jpg'<span>)
        {
            imagejpeg(</span><span>$image</span> , <span>$dir</span>.'/'.<span>$_POST</span>['id'].<span>$_SESSION</span>['ext'] , 100<span>);
        }
        </span><span>if</span>(<span>$_SESSION</span>['ext'] == '.png'<span>)
        {
            </span><span>//</span><span>压缩等级必须是0-9的png文件</span>
            imagepng(<span>$image</span> , <span>$dir</span>.'/'.<span>$_POST</span>['id'].<span>$_SESSION</span>['ext'<span>]);
        }
        </span><span>if</span>(<span>$_SESSION</span>['ext'] == '.gif'<span>)
        {
            imagegif(</span><span>$image</span> , <span>$dir</span>.'/'.<span>$_POST</span>['id'].<span>$_SESSION</span>['ext'<span>]);
        }    
        </span><span>echo</span> "修改好的大图：<img  src='"."images/" . <span alt="php随笔1-php图片处理，_PHP教程" >$_POST</span>['id'] . <span>$_SESSION</span>['ext']."' alt='' /> <br />"<span>;
    </span>?>
        <html>
            <head>
                <title>你的图片在这！</title>
            </head>
            <body>
                <h1>你的图片被保存！</h1>
                <img  src="images/<?php echo <span alt="php随笔1-php图片处理，_PHP教程" >$_POST</span>['id'];?>.jpg" alt="" />
            </body>
        </html>
    <?<span>php 
    }
    </span><span>else</span><span>
    {   
    </span>?>
    <html>
        <head>
            <title>你的图片在这！</title>
        </head>
        <body>
            <p>这里是你上传到服务器上的图片：</p>
        </body>
    </html>
    <?<span>php
        </span><span>if</span>(<span>$_POST</span>['submit'] == 'Upload'<span>)
        {
            </span><span>$imagename</span> = 'images/'.<span>$image_id</span>.<span>$_SESSION</span>['ext'<span>];
        }
        </span><span>else</span><span>
        {
            </span><span>$imagename</span> = 'image_effect.php?id='.<span>$image_id</span>.'&e='.<span>$_POST</span>['effect'<span>];
            </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>]))
            {
                </span><span>$imagename</span> .= '&capt='.<span>urlencode</span>(<span>$image_caption</span><span>);
            }
            </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_logo'<span>]))
            {
                </span><span>$imagename</span> .= '&logo=1'<span>;
            }
        }
    </span>?>
    <div>
    <?php  <span>echo</span>  "src：".<span>$imagename</span> ;  ?>
    <img  src="<?php echo <span alt="php随笔1-php图片处理，_PHP教程" >$imagename</span>;?>">as</span>:</td>
            <td><?php <span>echo</span>  "moviesite数据库images表第".<span>$image_id</span> ."行！" ;?></td>
        </tr>
        <tr>
            <td>Height:</td>
            <td><?php <span>echo</span> <span>$height</span>;?></td>
        </tr>
        <tr>
            <td>Widht:</td>
            <td><?php <span>echo</span> <span>$width</span>;?></td>
        </tr>
        <tr>
            <td>Upload <span>date</span>:</td>
            <td><?php <span>echo</span> <span>$image_date</span>;?></td>
        </tr>
    </table>
    <p>你可以从下面的选项列表中对你的图像应用一个特殊的效果。注：使用任何一个过滤器，保存一个图像 <em>可以撤消</em></p>
    <form action="<?php echo <span>$_SERVER</span>['PHP_SELF'];?>" method="post">
        
            <input type="hidden" name="id" value="<?php echo <span>$image_id</span>;?>"/>
            <select name="effect" id="">
                <option value="-1">保持原状</option>
                <?<span>php 
                    </span><span>echo</span> '<option value="'.IMG_FILTER_GRAYSCALE.'" '<span>;
                    </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['effect']) && <span>$_POST</span>['effect'] ==<span> IMG_FILTER_GRAYSCALE)
                    {
                        </span><span>echo</span> 'selected="selected"'<span>;
                    }
                    </span><span>echo</span> ' >灰度图像</option>'<span>;
                    
                    </span><span>echo</span> '<option value="'.IMG_FILTER_GAUSSIAN_BLUR.'"'<span>;
                    </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['effect']) && <span>$_POST</span>['effect'] ==<span> IMG_FILTER_GAUSSIAN_BLUR)
                    {
                        </span><span>echo</span> ' selected="selected"'<span>;
                    }
                    </span><span>echo</span> '>高斯算法模糊图像</option>'<span>;
                    
                    </span><span>echo</span> '<option value="'.IMG_FILTER_EMBOSS.'"'<span>;
                    </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['effect']) && <span>$_POST</span>['effect'] ==<span> IMG_FILTER_EMBOSS)
                    {
                        </span><span>echo</span> 'selected="selected"'<span>;
                    }
                    </span><span>echo</span> '>图像浮雕化</option>'<span>;
                    
                    </span><span>echo</span> '<option value="'.IMG_FILTER_NEGATE.'"'<span>;
                    </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['effect']) && <span>$_POST</span>['effect'] ==<span> IMG_FILTER_NEGATE)
                    {
                        </span><span>echo</span> 'selected="selected"'<span>;
                    }
                    </span><span>echo</span> '>图像中所有颜色反转</option>'<span>;
                </span>?>
            </select><br />   
            <?<span>php 
                </span><span>echo</span> '<input type="checkbox" name="emb_caption"'<span>;
                </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>]))
                {
                    </span><span>echo</span> ' checked="checked"'<span>;
                }
                </span><span>echo</span> ' />是否嵌入在图像的标题？'<span>;
                </span><span>echo</span> '<br />'<span>;
                
                </span><span>//</span><span>添加水印选项</span>
                <span>echo</span> '<input type="checkbox" name="emb_logo" '<span>;
                </span><span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_logo'<span>]))
                {
                    </span><span>echo</span> 'checked="checked"'<span>;
                }
                </span><span>echo</span> ' />是否嵌入668LOGO？'. '<br />'<span>;
            </span>?>         
            <input type="submit" value="Save" name="submit" />
            <!--<input type="submit" value="Preview" name="submit" />-->
         </form>
        </div>

    <?<span>php 
    }
    </span><span>mysql_close</span>(<span>$db</span><span>);
    </span>?>
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本来有一个Preview的，后来没弄了，但是代码还是给上 image_effect.php ,已经把Preview注释掉了。

<?<span>php 
</span><span>//</span><span>上传文件的路径</span>
<span>$dir</span> = 'D:\phpStudy\WWW\loadimages\images'<span>;
</span><span>//</span><span>设置环境变量
putenv('GDFONTPATH='.'C:\Windows\Fonts');</span>
<span>$font</span> = "C:\Windows\Fonts\arial.ttf"<span>;

</span><span>if</span>(<span>isset</span>(<span>$_GET</span>['id']) && <span>ctype_digit</span>(<span>$_GET</span>['id']) && <span>file_exists</span>(<span>$dir</span>.'/'.<span>$_GET</span>['id'].<span>$_SESSION</span>['ext'<span>]))
{
    </span><span>$image</span> = imagecreatefromjpeg(<span>$dir</span>.'/'.<span>$_GET</span>['id'].<span>$_SESSION</span>['ext'<span>]);
}
</span><span>else</span><span>
{
    </span><span>die</span>('invalid image specified'<span>);
}

</span><span>$effect</span> = (<span>isset</span>(<span>$_GET</span>['e'])) ? <span>$_GET</span>['e'] : -1<span>;

</span><span>switch</span>(<span>$effect</span><span>)
{
    </span><span>case</span> IMG_FILTER_NEGATE:<span>
        imagefilter(</span><span>$image</span> ,<span> IMG_FILTER_NEGATE);
    </span><span>break</span><span>;
    </span><span>case</span> IMG_FILTER_GRAYSCALE:<span>
        imagefilter(</span><span>$image</span> ,<span> IMG_FILTER_GRAYSCALE);
    </span><span>break</span><span>;    
    </span><span>case</span> IMG_FILTER_EMBOSS:<span>
        imagefilter(</span><span>$image</span> ,<span> IMG_FILTER_EMBOSS);
    </span><span>break</span><span>;    
    </span><span>case</span> IMG_FILTER_GAUSSIAN_BLUR:<span>
        imagefilter(</span><span>$image</span> ,<span> IMG_FILTER_GAUSSIAN_BLUR);
    </span><span>break</span><span>;    
}

</span><span>if</span>(<span>isset</span>(<span>$_GET</span>['capt'<span>]))
{
    </span><span>//</span><span>echo $_GET['capt'];</span>
    imagettftext(<span>$image</span>, 12, 0, 20, 20, 0, <span>$font</span>, <span>$_GET</span>['capt'<span>]);
}

</span><span>if</span>(<span>isset</span>(<span>$_GET</span>['logo'<span>]))
{
    </span><span>list</span>(<span>$widht</span> , <span>$height</span>) = <span>getimagesize</span>(<span>$dir</span>.'/'.<span>$_GET</span>['id'].<span>$_SESSION</span>['ext'<span>]);
    </span><span>list</span>(<span>$wmk_width</span> , <span>$wmk_height</span>) = <span>getimagesize</span>('images/logo.png'<span>);
    </span><span>$x</span> = <span>$width</span>-<span>$wmk_width</span><span>;
    </span><span>$y</span> = <span>$height</span>-<span>$wmk_height</span><span>;
    </span><span>$wmk</span> = imagecreatefrompng('images/logo.png'<span>);
    imagecopymerge(</span><span>$image</span> , <span>$wmk</span> , <span>$x</span> , <span>$y</span> , 0 , 0 , <span>$wmk_width</span> , <span>$wmk_height</span> , 20<span>);
    imagedestroy(</span><span>$wmk</span><span>);
}


</span><span>if</span>(<span>$_SESSION</span>['ext'] == '.jpg'<span>)
{
     </span><span>header</span>('Content-Type:image/jpeg'<span>);
     imagejpeg(</span><span>$image</span> , '' , 100<span>);
}
</span><span>if</span>(<span>$_SESSION</span>['ext'] == '.png'<span>)
{
    </span><span>header</span>('Content-Type:image/png'<span>);
    imagepng(</span><span>$image</span> , ''<span> );
}
</span><span>if</span>(<span>$_SESSION</span>['ext'] == '.gif'<span>)
{
    </span><span>header</span>('Content-Type:image/gif'<span>);
    imagegif(</span><span>$image</span> , ''<span> );
}    

</span>?>
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内容总结：

本人是自学的php，代码书写多有不规范之处，并且有些位置的代码有重复累赘。以后需要加强。

upload_image.php: 主要是 HTML+Javascritp+Css 没什么可说的，主要就 javascript 调用 window.URL.createObjectURL(fileObj) 方法。获取图片的相对路径，并做图片的展示。

check_image.php: 1、session 用于保存从 upload_image.php 传递过来的图片的后缀名。

　　　　　　　　　 2、数据库moviesite创建，images表的创建 

    <span>$sql</span> = "<span>CREATE TABLE if not exists images                       
    (
        image_id int NOT NULL AUTO_INCREMENT, 
        PRIMARY KEY(image_id),
        image_caption varchar(15), 
        image_username varchar(15),
        image_filename varchar(15),
        image_date  datetime
    )</span>";
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　　　　　　　　　3、使用 imagecreatetruecolor 和 imagecopyresampled 将图片大小调整为1280X960.然后将图片上传保存到指定位置。

<span>　　　　　//</span><span>将图片改为1280X960
        //新建一个指定大小的真彩色图像big</span>
        <span>$big</span> = imagecreatetruecolor(1280, 960<span>);
        </span><span>//</span><span>重采样拷贝部分图像并调整大小为1280X960</span>
        imagecopyresampled(<span>$big</span>, <span>$image</span>, 0, 0, 0, 0, 1280, 960, <span>$array</span>[0], <span>$array</span>[1]);
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　　　　　　　　　4、如果图片已经上传，则从数据库中取图片名字

        <span>$query</span> = 'select image_id,image_caption,image_username,image_date from images where image_id='.<span>$_POST</span>['id'<span>];
        </span><span>$result</span> = <span>mysql_query</span>(<span>$query</span>,<span>$db</span>) or <span>die</span>(<span>mysql_error</span>(<span>$db</span><span>));
        </span><span>//</span><span>将结果集转换成关联数据，再将关联数组的键名当作变量名，值作为变量的值。</span>
        <span>extract</span>(<span>mysql_fetch_assoc</span>(<span>$result</span><span>));
        </span><span>list</span>(<span>$width</span>,<span>$height</span>,<span>$type</span>,<span>$attr</span>) = <span>getimagesize</span>(<span>$dir</span>.'/'.<span>$image_id</span>.<span>$_SESSION</span>['ext']);
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　　　　　　　　　5、bool imagefilter ( resource $src_im , int $filtertype [, int $arg1 [, int $arg2 [, int $arg3 ]]] ) 对图像使用过滤器 PS图片

<span> imagefilter() 把过滤器 filtertype 应用到图像上，在需要时使用 arg1，arg2 和 arg3。

filtertype 可以是下列中的一个：

    IMG_FILTER_NEGATE：将图像中所有颜色反转。
    IMG_FILTER_GRAYSCALE：将图像转换为灰度的。
    IMG_FILTER_BRIGHTNESS：改变图像的亮度。用 arg1 设定亮度级别。
    IMG_FILTER_CONTRAST：改变图像的对比度。用 arg1 设定对比度级别。
    IMG_FILTER_COLORIZE：与 IMG_FILTER_GRAYSCALE 类似，不过可以指定颜色。用 arg1，arg2 和 arg3 分别指定 red，blue 和 green。每种颜色范围是 0 到 255。
    IMG_FILTER_EDGEDETECT：用边缘检测来突出图像的边缘。
    IMG_FILTER_EMBOSS：使图像浮雕化。
    IMG_FILTER_GAUSSIAN_BLUR：用高斯算法模糊图像。
    IMG_FILTER_SELECTIVE_BLUR：模糊图像。
    IMG_FILTER_MEAN_REMOVAL：用平均移除法来达到轮廓效果。
    IMG_FILTER_SMOOTH：使图像更柔滑。用 arg1 设定柔滑级别。</span>
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　　　　　　　　 6、图片加文字

        <span>//</span><span>图片指定位置打印文字</span>
        <span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>]))
        {    </span><span>/*</span><span>
            array imagettftext ( resource $image , float $size , float $angle , int $x , int $y , int $color , string $fontfile , string $text )
            $image  图像源   $size    字体大小   $angle   逆时针旋转角度   $fontfile  字体类型   $text  文本内容
            </span><span>*/</span><span>
            imagettftext(</span><span>$image</span> , 12 , 0 , 20 , 20 , 0 , <span>$font</span> , <span>$image_caption</span><span>);
        }</span>
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　　　　　　　　　7、图片打LOGO

        <span>//</span><span>图片指定位置打LOGO</span>
        <span>if</span>(<span>isset</span>(<span>$_POST</span>['emb_logo'<span>]))
        {
            </span><span>//</span><span>获取水印图片的尺寸并创建水印</span>
            <span>list</span>(<span>$wmk_width</span> , <span>$wmk_height</span>) = <span>getimagesize</span>('images/logo.png'<span>);
            </span><span>//</span><span>$x = ($width-$wmk_width) / 2;
            //$y = ($height-$wmk_height)/2;</span>
            <span>$x</span> = <span>$width</span>-<span>$wmk_width</span><span>;
            </span><span>$y</span> = <span>$height</span>-<span>$wmk_height</span><span>;
            </span><span>$wmk</span> = imagecreatefrompng('images/logo.png'<span>);
            </span><span>//</span><span>把水印图片和原图片合并在一起</span>
            <span>/*</span><span>
            将 wmk 图像中坐标从 0，0 开始，宽度为 $wmk_width，高度为 $wmk_height 的一部分拷贝到 image 图像中坐标为 $x 和 $y 的位置上。
            两图像将根据 pct=20 来决定合并程度，其值范围从 0 到 100。当 pct = 0 时，实际上什么也没做，当为                     
            100 时对于调色板图像本函数和 imagecopy() 完全一样，它对真彩色图像实现了 alpha 透明。
            </span><span>*/</span><span>
            imagecopymerge(</span><span>$image</span> , <span>$wmk</span> , <span>$x</span> , <span>$y</span> , 0 , 0 , <span>$wmk_width</span> , <span>$wmk_height</span> , 20<span>);
            </span><span>//</span><span>清除水印图片</span>
            imagedestroy(<span>$wmk</span><span>);
        }</span>
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　　　　　　　　 8、缩略图 128X96 大小

        <span>//</span><span>缩略图大小</span>
        <span>$thumb_width</span> = <span>$width</span> * 0.10<span>;
        </span><span>$thumb_height</span> = <span>$height</span> * 0.10<span>;
                       
        </span><span>//</span><span>创建一个缩略图</span>
        <span>$thumb</span> = imagecreatetruecolor(<span>$thumb_width</span>, <span>$thumb_height</span><span>);
        imagecopyresampled(</span><span>$thumb</span>, <span>$image</span>, 0, 0, 0, 0, <span>$thumb_width</span>, <span>$thumb_height</span>, <span>$width</span>, <span>$height</span>);
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