为了试试图片处理函数的效果，就写了这个小Demo,里面的函数都是单独的，可以根据自己的情况提取，和修改参数。
因为偷懒吧，没有给封装成个类。需要的将就着看下吧。
功能包括
1.图片添加文字 2.图片缩放 3.图片裁剪 4.添加图片水印 5.图片旋转 6.水平翻转 7.垂直翻转
这里不再贴样例图片了
样例地址：http://xhua521.cn/DemoFolder/ImageHandle/index.php
1.ImgHandle.php文件
<?php $flag = $_GET['flag']; switch ($flag) { case 1: image("headImg.jpg","JPG11111"); //给图片加添字符串 break; case 2: thumb("headImg.jpg",50,50); //图片缩放 break; case 3: cut("headImg.jpg",50,50,230,130); //图片剪切 break; case 4: wetermark("headImg.jpg","shuiyin.png"); //添加水印文字 break; case 5: rotate("headImg.jpg",90); //旋转一定角度 break; case 6: trun_x("headImg.jpg"); //沿X轴水平翻转 break; case 7: trun_y("headImg.jpg"); //沿Y轴水平翻转 break; default: thumb("headImg.jpg",50,50); //图片缩放 break; } /** * 为图片添加文字 * string $filename 图片的路径 * string $string 像图片中添加的字符串 */ function image($filename,$string){ list($width,$height,$type) = getimagesize($filename); $types = array(1=>"gif",2=>"jpeg",3=>"png"); $createfrom = "imagecreatefrom".$types[$type]; $image = $createfrom($filename); $x = ($width-imagefontwidth(5)*strlen($string))/2; $y = ($height-imagefontheight(5))/2; $textColor = imagecolorallocate($image,255,0,0); imageString($image,5,$x,$y,$string,$textColor); header("Content-type:image/$types[$type]"); $output = "image".$types[$type]; $output($image); imagedestroy($image); } // image("headImg.jpg","JPG11111"); //给图片加添字符串 /** * 修改图片缩放 * string $filename 图片的路径 * int $width 缩放后的宽度 * int $height 缩放后的高度 */ function thumb($filename,$width=100,$height=100){ list($width_orig,$height_orig,$type) = getimagesize($filename); $types = array(1=>"gif",2=>"jpeg",3=>"png"); if($width && ($width_orig < $height_orig)){ $width = ($height/$height_orig)*$width_orig; }else { $height = ($width/$width_orig)*$height_orig; } $image_p = imagecreatetruecolor($width,$height); $image = imagecreatefromjpeg($filename); imagecopyresampled($image_p,$image,0,0,0,0,$width,$height,$width_orig,$height_orig); header("Content-type:image/$types[$type]"); imagejpeg($image_p); imagedestroy($image_p); imagedestroy($image); } // thumb("headImg.jpg",50,50); //图片缩放 /** * 裁剪图片 * string $filename 图片的路径 * int $x 起始点的x位置 * int $y 起始点的y位置 * int $width 缩放后的宽度 * int $height 缩放后的高度 */ function cut($filename,$x,$y,$width,$height){ list(,,$type) = getimagesize($filename); $types = array(1=>"gif",2=>"jpeg",3=>"png"); $createfrom = "imagecreatefrom".$types[$type]; $image = $createfrom($filename); $cutimg = imagecreatetruecolor($width,$height); imagecopyresampled($cutimg,$image,0,0,$x,$y,$width,$height,$width,$height); header("Content-type:image/$types[$type]"); $output = "image".$types[$type]; $output($cutimg); imagedestroy($cutimg); imagedestroy($image); } // cut("headImg.jpg",50,50,230,130); //图片剪切 /** * 为图片添加文字 * string $filename 背景图片的路径 * string $water 水印图片路径 */ function wetermark($filename,$water){ list($b_w,$b_h,$type) = getimagesize($filename); list($w_w,$w_h) = getimagesize($water); $posX = mt_rand(0,($b_w - $w_w)); $posY = mt_rand(0,($b_h - $w_h)); $types = array(1=>"gif",2=>"jpeg",3=>"png"); $createfrom = "imagecreatefrom".$types[$type]; $back = $createfrom($filename); $water = imagecreatefrompng($water); imagecopy($back,$water,$posX,$posY,0,0,$w_w,$w_h); header("Content-type:image/jpeg"); $output = "image".$types[$type]; $output($back); imagedestroy($image); imagedestroy($back); } // wetermark("headImg.jpg","shuiyin.png"); //添加水印文字 /** * 为图片添加文字 * string $filename 背景图片的路径 * int $degrees 旋转角度 */ function rotate($filename,$degrees){ list(,,$type) = getimagesize($filename); $types = array(1=>"gif",2=>"jpeg",3=>"png"); $createfrom = "imagecreatefrom".$types[$type]; $source = $createfrom($filename); $rotate = imagerotate($source,$degrees,0); header("Content-type:image/jpeg"); $output = "image".$types[$type]; $output($rotate); imagedestroy($rotate); } // rotate("headImg.jpg",90); //旋转一定角度 /** * 将图片沿Y轴翻转 * string $filename 背景图片的路径 */ function trun_y($filename){ list($width,$height,$type) = getimagesize($filename); //获取宽高也可以使用imagesx()、imagesy() $types = array(1=>"gif",2=>"jpeg",3=>"png"); $createfrom = "imagecreatefrom".$types[$type]; $back = $createfrom($filename); $new = imagecreatetruecolor($width,$height); for ($i=0; $i < $width; $i++) { imagecopy($new,$back,$width-$i-1,0,$i,0,1,$height); } header("Content-type:image/jpeg"); $output = "image".$types[$type]; $output($new); imagedestroy($new); } // trun_y("headImg.jpg"); //沿Y轴水平翻转 /** * 将图片沿X轴翻转 * string $filename 背景图片的路径 */ function trun_x($filename){ list($width,$height,$type) = getimagesize($filename); //获取宽高也可以使用imagesx()、imagesy() $types = array(1=>"gif",2=>"jpeg",3=>"png"); $createfrom = "imagecreatefrom".$types[$type]; $back = $createfrom($filename); $new = imagecreatetruecolor($width,$height); for ($i=0; $i < $height; $i++) { imagecopy($new,$back,0,$height-$i-1,0,$i,$width,1); } header("Content-type:image/jpeg"); $output = "image".$types[$type]; $output($new); imagedestroy($new); } // trun_x("headImg.jpg"); //沿X轴垂直翻转 ?>2.index.php文件
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>图片处理结果</title> </head> <style media="screen"> .div1{ display: inline-block; border: 1px solid #000; } </style> <body> <a href="../index.html">返回Demo列表</a> <br/> <dl class="dlist"> <dt><h2>原图:</h2></dt> <dd><img src="./headImg.jpg" alt=""></dd> <hr/> <div class="div1"> <dt><h2>加添字符串:</h2></dt> <dd><img src="./ImgHandle.php?flag=1" alt=""></dd> </div> <div class="div1"> <dt><h2>图片缩放:</h2></dt> <dd><img src="./ImgHandle.php?flag=2" alt=""></dd> </div> <div class="div1"> <dt><h2>图片剪切:</h2></dt> <dd><img src="./ImgHandle.php?flag=3" alt=""></dd> </div> <div class="div1"> <dt><h2>添加水印图文:</h2></dt> <dd><img src="./ImgHandle.php?flag=4" alt=""></dd> </div> <div class="div1"> <dt><h2>旋转一定角度:</h2></dt> <dd><img src="./ImgHandle.php?flag=5" alt=""></dd> </div> <div class="div1"> <dt><h2>沿X轴水平翻转:</h2></dt> <dd><img src="./ImgHandle.php?flag=6" alt=""></dd> </div> <div class="div1"> <dt><h2>沿Y轴水平翻转:</h2></dt> <dd><img src="./ImgHandle.php?flag=7" alt=""></dd> </div> </dl> </body> </html> 如果代码中有什么不对的地方可以向我提出来~！