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844天前<?php |
/** |
* desription 判断是否gif动画 |
* @param sting $image_file图片路径 |
* @return boolean t 是 f 否 |
*/ |
function check_gifcartoon($image_file){ |
$fp = fopen($image_file,'rb'); |
$image_head = fread($fp,1024); |
fclose($fp); |
return preg_match("/".chr(0x21).chr(0xff).chr(0x0b).'NETSCAPE2.0'."/",$image_head)?false:true; |
} |
/** |
* desription 压缩图片 |
* @param sting $imgsrc 图片路径 |
* @param string $imgdst 压缩后保存路径 |
*/ |
function compressed_image($imgsrc,$imgdst){ |
list($width,$height,$type)=getimagesize($imgsrc); |
$new_width = ($width>600?600:$width)*0.9; |
$new_height =($height>600?600:$height)*0.9; |
switch($type){ |
case 1: |
$giftype=check_gifcartoon($imgsrc); |
if($giftype){ |
header('Content-Type:image/gif'); |
$image_wp=imagecreatetruecolor($new_width, $new_height); |
$image = imagecreatefromgif($imgsrc); |
imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); |
//75代表的是质量、压缩图片容量大小 |
imagejpeg($image_wp, $imgdst,75); |
imagedestroy($image_wp); |
} |
break; |
case 2: |
header('Content-Type:image/jpeg'); |
$image_wp=imagecreatetruecolor($new_width, $new_height); |
$image = imagecreatefromjpeg($imgsrc); |
imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); |
//75代表的是质量、压缩图片容量大小 |
imagejpeg($image_wp, $imgdst,75); |
imagedestroy($image_wp); |
break; |
case 3: |
header('Content-Type:image/png'); |
$image_wp=imagecreatetruecolor($new_width, $new_height); |
$image = imagecreatefrompng($imgsrc); |
imagecopyresampled($image_wp, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); |
//75代表的是质量、压缩图片容量大小 |
imagejpeg($image_wp, $imgdst,75); |
imagedestroy($image_wp); |
break; |
} |
} |
by: 发表于：2017-10-16 17:23:21 顶(0) | 踩(0) 回复
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