摘要： $uri = 'http://localhost/ToyTest/X17-45990_1.dmg';echo remote_filesize($uri);function remote_filesize($uri,$user='',$pw=''){ ob_start(); $ch = curl_init($uri); curl_setopt($ch,CURLOPT_HEADER, 1); curl_setopt($ch,CURLOPT_NOBODY, 1); if (!empty($user)&& !empty($pw)){ $h 阅读全文