php给图片加文字
在图片上加文字是论坛,博客,新闻网站上最喜欢用的功能,防止盗图。这里看看代码是如何实现的。 首先还是upload_image.php这个文件,注意这里的caption文本框中输入的内容最终会写到图片上面 ? php // 修改图片效果 $db = mysql_connect ('localhost','root
在图片上加文字是论坛,博客,新闻网站上最喜欢用的功能,防止盗图。这里看看代码是如何实现的。
首先还是upload_image.php这个文件,注意这里的caption文本框中输入的内容最终会写到图片上面
<span>php </span><span>//</span><span>修改图片效果</span> <span>$db</span> = <span>mysql_connect</span>('localhost','root','Ctrip07185419') or <span>die</span>('can not connect to database'<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>$dir</span> = 'D:\Serious\phpdev\test\images'<span>; </span><span>//</span><span>设置环境变量 //putenv('GDFONTPATH='.'C:\Windows\Fonts');</span> <span>$font</span> = "C:\Windows\Fonts\arial.ttf"<span>; </span><span>//</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>$_POST</span>['submit'] == 'Upload'<span>) { </span><span>if</span>(<span>$_FILES</span>['uploadfile']['error'] !=<span> UPLOAD_ERR_OK) { </span><span>switch</span>(<span>$_FILES</span>['uploadfile']['error'<span>]) { </span><span>case</span> UPLOAD_ERR_INI_SIZE: <span>die</span>('The uploaded file exceeds the upload_max_filesize directive'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_FORM_SIZE: <span>die</span>('The upload file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_PARTIAL: <span>die</span>('The uploaded file was only partially uploaded'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_NO_FILE: <span>die</span>('No file was uploaded'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_NO_TMP_DIR: <span>die</span>('The server is missing a temporary folder'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_CANT_WRITE: <span>die</span>('The server fail to write the uploaded file to the disk'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_EXTENSION: <span>die</span>('The upload stopped by extension'<span>); </span><span>break</span><span>; } } </span><span>$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>list</span>(<span>$width</span>,<span>$height</span>,<span>$type</span>,<span>$attr</span>) = <span>getimagesize</span>(<span>$_FILES</span>['uploadfile']['tmp_name'<span>]); </span><span>$error</span> = 'The file you upload is not a supported filetype'<span>; </span><span>switch</span>(<span>$type</span><span>) { </span><span>case</span> IMAGETYPE_GIF: <span>$image</span> = imagecreatefromgif(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>(<span>$error</span><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>(<span>$error</span><span>); </span><span>break</span><span>; </span><span>case</span> IMAGETYPE_PNG: <span>$image</span> = imagecreatefrompng(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>(<span>$error</span><span>); </span><span>break</span><span>; </span><span>default</span>: <span>break</span><span>; } </span><span>$query</span> = 'insert into images(image_caption,image_username,image_date) values("'.<span>$image_caption</span>.'" , "'.<span>$image_username</span>.'","'.<span>$image_date</span>.'")'<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>$last_id</span> = <span>mysql_insert_id</span><span>(); </span><span>//</span><span> $imagename = $last_id.'.jpg'; // imagejpeg($image,$dir.'/'.$imagename); // imagedestroy($image);</span> <span>$image_id</span> = <span>$last_id</span><span>; imagejpeg(</span><span>$image</span> , <span>$dir</span>.'/'.<span>$image_id</span>.'.jpg'<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>$db</span><span>)); </span><span>extract</span>(<span>mysql_fetch_assoc</span>(<span>$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>.'.jpg'<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>$_POST</span>['id'].'.jpg'<span>)) { </span><span>$image</span> = imagecreatefromjpeg(<span>$dir</span>.'/'.<span>$_POST</span>['id'].'.jpg'<span>); } </span><span>else</span><span> { </span><span>die</span>('invalid image specified'<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>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>])) { imagettftext(</span><span>$image</span> , 12 , 0 , 20 , 20 , 0 , <span>$font</span> , <span>$image_caption</span><span>); } imagejpeg(</span><span>$image</span> , <span>$dir</span>.'/'.<span>$_POST</span>['id'].'.jpg' , 100<span>); </span>?> <title>Here is your pic!</title> <h1 id="Your-image-has-been-saved">Your image has been saved!</h1> <img src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F152205020151940.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3731018.html" class="lazy" id alt="php给图片加文字" >.jpg" alt="" /> <span>php } </span><span>else</span><span> { </span>?> <title>Here is your pic!</title> <h1 id="So-how-does-it-feel-to-be-famous">So how does it feel to be famous?</h1> <p>Here is the picture you just uploaded to your servers:</p> <!--<img src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F152205020151940.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3731018.html" class="lazy" alt="" style="max-width:90%" />--> <span>php </span><span>if</span>(<span>$_POST</span>['submit'] == 'Upload'<span>) { </span><span>$imagename</span> = 'images/'.<span>$image_id</span>.'.jpg'<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>?> <img src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F152205020151940.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3731018.html" class="lazy" style="max-width:90%" alt="">
Image save as: | $image_id?> |
Height: | echo $height;?> |
Widht: | echo $width;?> |
Upload date: | echo $image_date;?> |
You may apply a special effect to your image from the list of option below. Note:saving an image with any of the filters applied can be undone
php } ?>注意这里有个问题,选择字体的时要加上绝对路径并且带上后缀.tff,否则的话是看不到图片的,下面的代码是image_effect.php
<span>php </span><span>//</span><span>修改图片效果</span> <span>$db</span> = <span>mysql_connect</span>('localhost','root','Ctrip07185419') or <span>die</span>('can not connect to database'<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>$dir</span> = 'D:\Serious\phpdev\test\images'<span>; </span><span>//</span><span>设置环境变量 //putenv('GDFONTPATH='.'C:\Windows\Fonts');</span> <span>$font</span> = "C:\Windows\Fonts\arial.ttf"<span>; </span><span>//</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>$_POST</span>['submit'] == 'Upload'<span>) { </span><span>if</span>(<span>$_FILES</span>['uploadfile']['error'] !=<span> UPLOAD_ERR_OK) { </span><span>switch</span>(<span>$_FILES</span>['uploadfile']['error'<span>]) { </span><span>case</span> UPLOAD_ERR_INI_SIZE: <span>die</span>('The uploaded file exceeds the upload_max_filesize directive'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_FORM_SIZE: <span>die</span>('The upload file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_PARTIAL: <span>die</span>('The uploaded file was only partially uploaded'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_NO_FILE: <span>die</span>('No file was uploaded'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_NO_TMP_DIR: <span>die</span>('The server is missing a temporary folder'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_CANT_WRITE: <span>die</span>('The server fail to write the uploaded file to the disk'<span>); </span><span>break</span><span>; </span><span>case</span> UPLOAD_ERR_EXTENSION: <span>die</span>('The upload stopped by extension'<span>); </span><span>break</span><span>; } } </span><span>$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>list</span>(<span>$width</span>,<span>$height</span>,<span>$type</span>,<span>$attr</span>) = <span>getimagesize</span>(<span>$_FILES</span>['uploadfile']['tmp_name'<span>]); </span><span>$error</span> = 'The file you upload is not a supported filetype'<span>; </span><span>switch</span>(<span>$type</span><span>) { </span><span>case</span> IMAGETYPE_GIF: <span>$image</span> = imagecreatefromgif(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>(<span>$error</span><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>(<span>$error</span><span>); </span><span>break</span><span>; </span><span>case</span> IMAGETYPE_PNG: <span>$image</span> = imagecreatefrompng(<span>$_FILES</span>['uploadfile']['tmp_name']) or <span>die</span>(<span>$error</span><span>); </span><span>break</span><span>; </span><span>default</span>: <span>break</span><span>; } </span><span>$query</span> = 'insert into images(image_caption,image_username,image_date) values("'.<span>$image_caption</span>.'" , "'.<span>$image_username</span>.'","'.<span>$image_date</span>.'")'<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>$last_id</span> = <span>mysql_insert_id</span><span>(); </span><span>//</span><span> $imagename = $last_id.'.jpg'; // imagejpeg($image,$dir.'/'.$imagename); // imagedestroy($image);</span> <span>$image_id</span> = <span>$last_id</span><span>; imagejpeg(</span><span>$image</span> , <span>$dir</span>.'/'.<span>$image_id</span>.'.jpg'<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>$db</span><span>)); </span><span>extract</span>(<span>mysql_fetch_assoc</span>(<span>$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>.'.jpg'<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>$_POST</span>['id'].'.jpg'<span>)) { </span><span>$image</span> = imagecreatefromjpeg(<span>$dir</span>.'/'.<span>$_POST</span>['id'].'.jpg'<span>); } </span><span>else</span><span> { </span><span>die</span>('invalid image specified'<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>if</span>(<span>isset</span>(<span>$_POST</span>['emb_caption'<span>])) { imagettftext(</span><span>$image</span> , 12 , 0 , 20 , 20 , 0 , <span>$font</span> , <span>$image_caption</span><span>); } imagejpeg(</span><span>$image</span> , <span>$dir</span>.'/'.<span>$_POST</span>['id'].'.jpg' , 100<span>); </span>?> <title>Here is your pic!</title> <h1 id="Your-image-has-been-saved">Your image has been saved!</h1> <img src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F152205020151940.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3731018.html" class="lazy" id alt="php给图片加文字" >.jpg" alt="" /> <span>php } </span><span>else</span><span> { </span>?> <title>Here is your pic!</title> <h1 id="So-how-does-it-feel-to-be-famous">So how does it feel to be famous?</h1> <p>Here is the picture you just uploaded to your servers:</p> <!--<img src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F152205020151940.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3731018.html" class="lazy" alt="" style="max-width:90%" />--> <span>php </span><span>if</span>(<span>$_POST</span>['submit'] == 'Upload'<span>) { </span><span>$imagename</span> = 'images/'.<span>$image_id</span>.'.jpg'<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>?> <img src="/static/imghw/default1.png" data-src="/inc/test.jsp?url=http%3A%2F%2Fimages.cnitblog.com%2Fi%2F72678%2F201405%2F152205020151940.png&refer=http%3A%2F%2Fwww.cnblogs.com%2Ftylerdonet%2Fp%2F3731018.html" class="lazy" style="max-width:90%" alt="">
Image save as: | $image_id?> |
Height: | echo $height;?> |
Widht: | echo $width;?> |
Upload date: | echo $image_date;?> |
You may apply a special effect to your image from the list of option below. Note:saving an image with any of the filters applied can be undone
php } ?>这里如果我们写成下面这样
<span>putenv</span>('GDFONTPATH='.'C:\Windows\Fonts'<span>); </span><span>$font</span> = "arial";
是看不到效果的,这里顺便提一下,火狐是最佳的开发工具,怎么讲呢,看看下面的对比吧。
火狐的提示是这样的:
图片没有截完整提示是:The image “http://localhost:81/test/image_effect.php?id=31&e=-1&capt=you+are+big+bitch” cannot be displayed because it contains errors.
谷歌浏览器的显示如下:
一个未能正确显示的图片,什么信息都没有。
再来看看大IE的,如下:
也能看到错误信息,但是一大堆乱码啊!
所以说开发人员好帮手还是火狐。

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