PHP-图片压缩

WBOY
Release: 2016-06-23 14:30:18
Original
878 people have browsed it

方式一:

<?php/*----------------------------------------------------------------------函数:调整图片尺寸或生成缩略图修改:2009-8-8返回:True/False参数:   $Image   需要调整的图片(含路径)   $Dw=450   调整时最大宽度;缩略图时的绝对宽度   $Dh=450   调整时最大高度;缩略图时的绝对高度   $Type=1   1,调整尺寸; 2,生成缩略图作者:Seven(QQ:9256114)WWW.7DI.NET*/$path='img/';//路径$phtypes=array(   'img/gif',   'img/jpg',   'img/jpeg',   'img/bmp',   'img/pjpeg',   'img/x-png');Function Img($Image,$Dw=450,$Dh=450,$Type=1){   IF(!File_Exists($Image)){    Return False;   }   #如果需要生成缩略图,则将原图拷贝一下重新给$Image赋值   IF($Type!=1){    Copy($Image,Str_Replace(".","_x.",$Image));    $Image=Str_Replace(".","_x.",$Image);   }   #取得文件的类型,根据不同的类型建立不同的对象   $ImgInfo=GetImageSize($Image);   Switch($ImgInfo[2]){   Case 1:    $Img = @ImageCreateFromGIF($Image);   Break;   Case 2:    $Img = @ImageCreateFromJPEG($Image);   Break;   Case 3:    $Img = @ImageCreateFromPNG($Image);   Break;   }   #如果对象没有创建成功,则说明非图片文件   IF(Empty($Img)){    #如果是生成缩略图的时候出错,则需要删掉已经复制的文件    IF($Type!=1){Unlink($Image);}    Return False;   }   #如果是执行调整尺寸操作则   IF($Type==1){    $w=ImagesX($Img);    $h=ImagesY($Img);    $width = $w;    $height = $h;    IF($width>$Dw){     $Par=$Dw/$width;     $width=$Dw;     $height=$height*$Par;     IF($height>$Dh){      $Par=$Dh/$height;      $height=$Dh;      $width=$width*$Par;     }    }ElseIF($height>$Dh){     $Par=$Dh/$height;     $height=$Dh;     $width=$width*$Par;     IF($width>$Dw){      $Par=$Dw/$width;      $width=$Dw;      $height=$height*$Par;     }    }Else{     $width=$width;     $height=$height;    }    $nImg = ImageCreateTrueColor($width,$height);     #新建一个真彩色画布    ImageCopyReSampled($nImg,$Img,0,0,0,0,$width,$height,$w,$h);#重采样拷贝部分图像并调整大小    ImageJpeg ($nImg,$Image);          #以JPEG格式将图像输出到浏览器或文件    Return True;   #如果是执行生成缩略图操作则   }Else{    $w=ImagesX($Img);    $h=ImagesY($Img);    $width = $w;    $height = $h;    $nImg = ImageCreateTrueColor($Dw,$Dh);    IF($h/$w>$Dh/$Dw){ #高比较大     $width=$Dw;     $height=$h*$Dw/$w;     $IntNH=$height-$Dh;     ImageCopyReSampled($nImg, $Img, 0, -$IntNH/1.8, 0, 0, $Dw, $height, $w, $h);    }Else{     #宽比较大     $height=$Dh;     $width=$w*$Dh/$h;     $IntNW=$width-$Dw;     ImageCopyReSampled($nImg, $Img, -$IntNW/1.8, 0, 0, 0, $width, $Dh, $w, $h);    }    ImageJpeg ($nImg,$Image);    Return True;   }}?><html><body><form  method="post" enctype="multipart/form-data" name="form1">  <table>    <tr><td>上传图片</td></tr>    <tr><td><input type="file" name="photo" size="20" /></td></tr>  <tr><td><input type="submit" value="上传"/></td></tr>  </table>  允许上传的文件类型为:<?=implode(', ',$phtypes)?></form><?php if($_SERVER['REQUEST_METHOD']=='POST'){    if (!is_uploaded_file($_FILES["photo"][tmp_name])){      echo "图片不存在";      exit();    }    if(!is_dir('img')){//路径若不存在则创建     mkdir('img');    }    $upfile=$_FILES["photo"];     $pinfo=pathinfo($upfile["name"]);    $name=$pinfo['basename'];//文件名    $tmp_name=$upfile["tmp_name"];    $file_type=$pinfo['extension'];//获得文件类型    $showphpath=$path.$name;       if(in_array($upfile["type"],$phtypes)){      echo "文件类型不符!";      exit();     }   if(move_uploaded_file($tmp_name,$path.$name)){    echo "成功!"; Img($showphpath,100,800,2);   }   echo "<img  src=\"".$showphpath."\"  / alt="PHP-图片压缩" >"; }?></body></html>
Copy after login

方式二:

PHP图片压缩的类<?phpclass ThumbHandler{var $dst_img;// 目标文件var $h_src; // 图片资源句柄var $h_dst;// 新图句柄var $h_mask;// 水印句柄var $img_create_quality = 100;// 图片生成质量var $img_display_quality = 80;// 图片显示质量,默认为75var $img_scale = 0;// 图片缩放比例var $src_w = 0;// 原图宽度var $src_h = 0;// 原图高度var $dst_w = 0;// 新图总宽度var $dst_h = 0;// 新图总高度var $fill_w;// 填充图形宽var $fill_h;// 填充图形高var $copy_w;// 拷贝图形宽var $copy_h;// 拷贝图形高var $src_x = 0;// 原图绘制起始横坐标var $src_y = 0;// 原图绘制起始纵坐标var $start_x;// 新图绘制起始横坐标var $start_y;// 新图绘制起始纵坐标var $mask_word;// 水印文字var $mask_img;// 水印图片var $mask_pos_x = 0;// 水印横坐标var $mask_pos_y = 0;// 水印纵坐标var $mask_offset_x = 5;// 水印横向偏移var $mask_offset_y = 5;// 水印纵向偏移var $font_w;// 水印字体宽var $font_h;// 水印字体高var $mask_w;// 水印宽var $mask_h;// 水印高var $mask_font_color = "#ffffff";// 水印文字颜色var $mask_font = 2;// 水印字体var $font_size;// 尺寸var $mask_position = 0;// 水印位置var $mask_img_pct = 50;// 图片合并程度,值越大,合并程序越低var $mask_txt_pct = 50;// 文字合并程度,值越小,合并程序越低var $img_border_size = 0;// 图片边框尺寸var $img_border_color;// 图片边框颜色var $_flip_x=0;// 水平翻转次数var $_flip_y=0;// 垂直翻转次数var $cut_type=0;// 剪切类型var $img_type;// 文件类型// 文件类型定义,并指出了输出图片的函数var $all_type = array(       "jpg"   => array("output"=>"imagejpeg"),       "gif"   => array("output"=>"imagegif"),       "png"   => array("output"=>"imagepng"),       "wbmp" => array("output"=>"image2wbmp"),       "jpeg" => array("output"=>"imagejpeg"));/**    * 构造函数    */function ThumbHandler(){       $this->mask_font_color = "#ffffff";       $this->font = 2;       $this->font_size = 12;}/**    * 取得图片的宽    */function getImgWidth($src){       return imagesx($src);}/**    * 取得图片的高    */function getImgHeight($src){       return imagesy($src);}/**    * 设置图片生成路径    *    * @param string $src_img 图片生成路径    */function setSrcImg($src_img, $img_type=null){       if(!file_exists($src_img))       {         die("图片不存在");       }             if(!empty($img_type))       {         $this->img_type = $img_type;       }       else       {         $this->img_type = $this->_getImgType($src_img);       }             $this->_checkValid($this->img_type);       // file_get_contents函数要求php版本>4.3.0       $src = '';       if(function_exists("file_get_contents"))       {         $src = file_get_contents($src_img);       }       else       {         $handle = fopen ($src_img, "r");         while (!feof ($handle))         {            $src .= fgets($fd, 4096);                                   }         fclose ($handle);       }       if(empty($src))       {         die("图片源为空");       }       $this->h_src = @ImageCreateFromString($src);       $this->src_w = $this->getImgWidth($this->h_src);       $this->src_h = $this->getImgHeight($this->h_src);}/**    * 设置图片生成路径    *    * @param string $dst_img 图片生成路径    */function setDstImg($dst_img){       $arr   = explode('/',$dst_img);       $last = array_pop($arr);       $path = implode('/',$arr);       $this->_mkdirs($path);       $this->dst_img = $dst_img;}/**    * 设置图片的显示质量    *    * @param string    $n 质量    */function setImgDisplayQuality($n){       $this->img_display_quality = (int)$n;}/**    * 设置图片的生成质量    *    * @param string    $n 质量    */function setImgCreateQuality($n){       $this->img_create_quality = (int)$n;}/**    * 设置文字水印    *    * @param string     $word 水印文字    * @param integer $font 水印字体    * @param string     $color 水印字体颜色    */function setMaskWord($word){       $this->mask_word .= $word;}/**    * 设置字体颜色    *    * @param string     $color 字体颜色    */function setMaskFontColor($color="#ffffff"){       $this->mask_font_color = $color;}/**    * 设置水印字体    *    * @param string|integer $font 字体    */function setMaskFont($font=2){       if(!is_numeric($font) && !file_exists($font))       {         die("字体文件不存在");       }       $this->font = $font;}/**    * 设置文字字体大小,仅对truetype字体有效    */function setMaskFontSize($size = "12"){       $this->font_size = $size;}/**    * 设置图片水印    *    * @param string $img     水印图片源    */function setMaskImg($img){       $this->mask_img = $img;}/**    * 设置水印横向偏移    *    * @param integer     $x 横向偏移量    */function setMaskOffsetX($x){       $this->mask_offset_x = (int)$x;}/**    * 设置水印纵向偏移    *    * @param integer     $y 纵向偏移量    */function setMaskOffsetY($y){       $this->mask_offset_y = (int)$y;}/**    * 指定水印位置    *    * @param integer     $position 位置,1:左上,2:左下,3:右上,0/4:右下    */function setMaskPosition($position=0){       $this->mask_position = (int)$position;}/**    * 设置图片合并程度    *    * @param integer     $n 合并程度    */function setMaskImgPct($n){       $this->mask_img_pct = (int)$n;}/**    * 设置文字合并程度    *    * @param integer     $n 合并程度    */function setMaskTxtPct($n){       $this->mask_txt_pct = (int)$n;}/**    * 设置缩略图边框    *    * @param (类型)     (参数名) (描述)    */function setDstImgBorder($size=1, $color="#000000"){       $this->img_border_size   = (int)$size;       $this->img_border_color = $color;}/**    * 水平翻转    */function flipH(){       $this->_flip_x++;}/**    * 垂直翻转    */function flipV(){       $this->_flip_y++;}/**    * 设置剪切类型    *    * @param (类型)     (参数名) (描述)    */function setCutType($type){       $this->cut_type = (int)$type;}/**    * 设置图片剪切    *    * @param integer     $width 矩形剪切    */function setRectangleCut($width, $height){       $this->fill_w = (int)$width;       $this->fill_h = (int)$height;}/**    * 设置源图剪切起始坐标点    *    * @param (类型)     (参数名) (描述)    */function setSrcCutPosition($x, $y){       $this->src_x   = (int)$x;       $this->src_y   = (int)$y;}/**    * 创建图片,主函数    * @param integer $a     当缺少第二个参数时,此参数将用作百分比,    *                             否则作为宽度值    * @param integer $b     图片缩放后的高度    */function createImg($a, $b=null){       $num = func_num_args();       if(1 == $num)       {         $r = (int)$a;         if($r < 1)         {            die("图片缩放比例不得小于1");         }         $this->img_scale = $r;         $this->_setNewImgSize($r);       }       if(2 == $num)       {         $w = (int)$a;         $h = (int)$b;         if(0 == $w)         {            die("目标宽度不能为0");         }         if(0 == $h)         {            die("目标高度不能为0");         }         $this->_setNewImgSize($w, $h);       }       if($this->_flip_x%2!=0)       {         $this->_flipH($this->h_src);       }       if($this->_flip_y%2!=0)       {         $this->_flipV($this->h_src);       }       $this->_createMask();       $this->_output();       // 释放       if(imagedestroy($this->h_src) && imagedestroy($this->h_dst))       {         Return true;       }       else       {         Return false;       }}/**    * 生成水印,调用了生成水印文字和水印图片两个方法    */function _createMask(){       if($this->mask_word)       {         // 获取字体信息         $this->_setFontInfo();         if($this->_isFull())         {            die("水印文字过大");         }         else         {            $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);            $white = ImageColorAllocate($this->h_dst,255,255,255);            imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色            $this->_drawBorder();            imagecopyresampled( $this->h_dst, $this->h_src,                                 $this->start_x, $this->start_y,                                 $this->src_x, $this->src_y,                                 $this->fill_w, $this->fill_h,                                 $this->copy_w, $this->copy_h);            $this->_createMaskWord($this->h_dst);         }       }       if($this->mask_img)       {         $this->_loadMaskImg();//加载时,取得宽高         if($this->_isFull())         {            // 将水印生成在原图上再拷            $this->_createMaskImg($this->h_src);            $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);            $white = ImageColorAllocate($this->h_dst,255,255,255);            imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色            $this->_drawBorder();            imagecopyresampled( $this->h_dst, $this->h_src,                                 $this->start_x, $this->start_y,                                 $this->src_x, $this->src_y,                                 $this->fill_w, $this->start_y,                                 $this->copy_w, $this->copy_h);         }         else         {            // 创建新图并拷贝            $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);            $white = ImageColorAllocate($this->h_dst,255,255,255);            imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色            $this->_drawBorder();            imagecopyresampled( $this->h_dst, $this->h_src,                                 $this->start_x, $this->start_y,                                 $this->src_x, $this->src_y,                                 $this->fill_w, $this->fill_h,                                 $this->copy_w, $this->copy_h);            $this->_createMaskImg($this->h_dst);         }       }       if(empty($this->mask_word) && empty($this->mask_img))       {         $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);         $white = ImageColorAllocate($this->h_dst,255,255,255);         imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色         $this->_drawBorder();         imagecopyresampled( $this->h_dst, $this->h_src,                     $this->start_x, $this->start_y,                     $this->src_x, $this->src_y,                     $this->fill_w, $this->fill_h,                     $this->copy_w, $this->copy_h);       }}/**    * 画边框    */function _drawBorder(){       if(!empty($this->img_border_size))       {         $c = $this->_parseColor($this->img_border_color);         $color = ImageColorAllocate($this->h_src,$c[0], $c[1], $c[2]);         imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$color);// 填充背景色       }}
Copy after login

  

Related labels:
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template