PHP远程下载文件

HttpDownload :: save2dir ($url,  $ localname,  $ forcibly );  
  
$forcibly (逼迫模式) 
如果有重名文件 则自动改名 [  待续  ]

 

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<?php

 

final class HttpDownload {

 

public static $filesize;

public static $Downloadstatus = FALSE;

 

private static function getfilesize($url) {

$headers = get_headers($url, 1);

if($headers[0] == 'HTTP/1.1 200 OK') {

if(isset($headers['Content-Length'])) {

return self::$filesize = (int)$headers['Content-Length'];

}

}

return self::$filesize = (int)0;

}

 

public static function save2dir($url, $localname, $forcibly = TRUE) {

$filesize = self::getfilesize($url);

if(is_resource(@fopen($url, 'r'))) {

set_time_limit(0);

if($forcibly) {

if(file_exists($localname)) unlink($localname);

}

copy($url, $localname);

return self::$Downloadstatus = (bool)true;

}

return self::$Downloadstatus = (bool)false;

}

 

 

}

 

HttpDownload::save2dir('http://www.baidu.com/index.html', 'baidu.html');

if(HttpDownload::$Downloadstatus) {

echo 'success';

}else{

echo 'failed';

}