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php 采集远程网页图片并保存到本地

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2016-06-08 17:27:541374browse
<script>ec(2);</script>

ob_start : 打开输出缓冲

readfile : 读入一个文件并写入到输出缓冲
返回从文件中读入的字节数。如果出错返回 FALSE 并且除非是以 @readfile() 形式调用,否则会显示错误信息。

ob_end_clean() : Clean (erase) the output buffer and turn off output buffering(清除输出缓冲)


//URL是远程的完整图片地址,不能为空, $filename 是另存为的图片名字
//默认把图片放在以此脚本相同的目录里
function GrabImage($url, $filename=""){
//$url 为空则返回 false;
if($url == ""){return false;}
$ext = strrchr($url, ".");//得到图片的扩展名
if($ext != ".gif" && $ext != ".jpg" && $ext != ".bmp"){echo "格式不支持!";return false;}
if($filename == ""){$filename = time()."$ext";}//以时间戳另起名
//开始捕捉
ob_start();
readfile($url);
$img = ob_get_contents();
ob_end_clean();
$size = strlen($img);
$fp2 = fopen($filename , "a");
fwrite($fp2, $img);
fclose($fp2);
return $filename;
}
//测试
GrabImage("http://www.111cn.net教程/banner/banner.gif", "as.gif");
?>

 

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