复制代码 代码如下:

<?php

$filename = './D243375_0.png';

$filename = realpath($filename);

if (!file_exists($filename)) {

die("图片不存在~!");

}

$size = getimagesize ($filename);

$file_extension = strtolower(substr(strrchr($filename,"."),1));

if("image/png" != $size['mime'] || $file_extension != "png"){

die("这不是一张完整的png图片");

}

$img = @imagecreatefrompng ($filename);

if($img){

ob_start("output_handler");

imagepng($img);

ob_end_flush();

}else{

die("不能正确的创建png图形,请检查png图形是否完好~");

}

function output_handler($img) {

header('Content-type: image/png');

header('Content-Length:'.strlen($img));

return $img;

}

?>