<?php 

header("Content-type: text/html; charset=utf-8");

 $filename="./images/zaixiankefu.jpg";

 function thumn($background,$width/*要缩放的宽度*/,$newfile) { //等比例缩放图片

 list($s_w, $s_h)=getimagesize($background);//获取原图片高度、宽度

 $height = ($width / $s_w)* $s_h;

 $new=imagecreatetruecolor($width, $height);//创建图片

 $img=imagecreatefrompng($background);//加载图片

 imagecopyresampled($new, $img, 0, 0, 0, 0, $width, $height, $s_w, $s_h);//裁剪图片

 $newt=imagecolorallocate($new,0,0,0);

 imagecolortransparent($new,$newt);

 imagepng($new, $newfile);//创建新图片

 imagedestroy($new);//销毁图像资源

 imagedestroy($img);

 }

//thumn($filename,50, "./images/shuiyin_chuli.png");

 function cut($background, $cut_x, $cut_y, $cut_width, $cut_height, $location){//裁剪图片

     list($s_w, $s_h)=getimagesize($background);

     if($cut_height > $s_h){

         $cut_height = $s_h;//判断若裁剪尺寸大于原尺寸，保持原尺寸

     }else{//判断偏移量，裁剪图片正中心

         $cut_y = ($s_h-$cut_height)/2;

     }

     if($cut_width > $s_w){//判断若裁剪尺寸大于原尺寸，保持原尺寸

         $cut_width = $s_w;

     }else{//判断偏移量，裁剪图片正中心

         $cut_x = ($s_w - $cut_width)/2;

     }

     $back=imagecreatefromjpeg($background);

     $new=imagecreatetruecolor($cut_width, $cut_height);

     imagecopyresampled($new, $back, 0, 0, $cut_x, $cut_y, $cut_width, $cut_height,$cut_width,$cut_height);

     imagejpeg($new, $location);

     imagedestroy($new);

     imagedestroy($back);

 }

 //cut($filename,0,0,50,50, "./images/zaixiankefu_chuli.jpg");

 function mark_text($background, $text, $x, $y,$newfile){

     $back=imagecreatefromjpeg($background);

     $color=imagecolorallocate($back, 0, 255, 0); //为一幅图像分配颜色,这里设置文字水印的颜色

     imagettftext($back, 20, 0, $x, $y, $color, 'font/arial.ttf', $text);

     imagejpeg($back,$newfile);

     imagedestroy($back);

 }

 //mark_text($filename, "PHP", 150, 250,"./images/zaixiankefu_chuli.jpg");

 function mark_pic($background, $waterpic, $x, $y,$newfile){//加图片水印，根据图片大小调整水印大小

     list($s_w, $s_h)=getimagesize($waterpic);

     list($i_w, $i_h)=getimagesize($background);

     $width = $i_w * 0.3;

     $height = ($width / $s_w)* $s_h;

     $new=imagecreatetruecolor($width, $height);//创建图片

     $water=imagecreatefrompng($waterpic);

     imagecopyresampled($new, $water,0,0, 0, 0,$width,$height, $s_w, $s_h);//裁剪图片

     $newt=imagecolorallocate($new,0,0,0);

     imagecolortransparent($new,$newt);

     imagepng($new,'./images/shuiyin_chuli.png');//输出经过比例缩小的水印

     imagedestroy($water);

     $back=imagecreatefromjpeg($background);

     $shuiyin = './images/shuiyin_chuli.png';//设置真实水印的大小

     $shuiyin_ture =imagecreatefrompng($shuiyin);

     $x = $i_w * 0.65;

     $y = $i_h * 0.7;

     imagecopy($back,$shuiyin_ture,$x,$y,0,0,$width,$height);

     imagejpeg($back,$newfile);

     imagedestroy($back);

 }

//mark_pic($filename, "./images/shuiyin.png",0 ,0 ,"./images/zaixiankefu_chuli.jpg");

?>

<p>处理前：<img src='<?php echo $filename; ?>' /></p>

<p>处理后：<img src='/images/zaixiankefu_chuli.jpg';' /></p>