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PHP获取远程文件内容

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<?php
/** 
    获取远程文件内容 
    @param $url 文件http地址 
*/ 
function fopen_url($url) 
{ 
    if (function_exists('file_get_contents')) { 
        $file_content = @file_get_contents($url); 
    } elseif (ini_get('allow_url_fopen') && ($file = @fopen($url, 'rb'))){ 
        $i = ; 
        while (!feof($file) && $i++ < 1000) { 
            $file_content .= strtolower(fread($file, 4096)); 
        } 
        fclose($file); 
    } elseif (function_exists('curl_init')) { 
        $curl_handle = curl_init(); 
        curl_setopt($curl_handle, CURLOPT_URL, $url); 
        curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT,2); 
        curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER,1); 
        curl_setopt($curl_handle, CURLOPT_FAILONERROR,1); 
        curl_setopt($curl_handle, CURLOPT_USERAGENT, 'Trackback Spam Check'); 
        $file_content = curl_exec($curl_handle); 
        curl_close($curl_handle); 
    } else { 
        $file_content = ''; 
    } 
    return $file_content; 
}
?>

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