<?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; } ?>