php代码：
<?php
function GrabImage($url, $filename = "") {
if ($url == "")
return false;
if ($filename == "") {
$ext = strrchr ( $url, "." );
if ($ext != ".gif" && $ext != ".jpg" && $ext != ".png" && $ext != ".bmp")
return false;
$filename = date ( "dMYHis" ) . $ext;
}
ob_start ();
readfile ( $url );
$img = ob_get_contents ();
ob_end_clean ();
$fp2 = @fopen ( $filename, "a" );
fwrite ( $fp2, $img );
fclose ( $fp2 );
return $filename;
}
?>
<html>
<head>
<title>图片下载</title>
</head>
<body>
<form method="POST" action="index.php">
图片URL: <input type="text" name="url" size="80" /> <input type="submit"
name="submit" value="提交" /><br />
<?php
if ($_POST ['submit'] != NULL) {
$img = GrabImage ( $_POST ['url'] );
if ($img)
echo '<pre class="brush:php;toolbar:false"><img src="' . $img . '">';
else
echo "下载失败。";
}
?>