PHP下載文件的函數(shù)實例代碼_

1、PHP下載文件的函數(shù)實例代碼_ 本文通過實例代碼給大家介紹php下載文件的函數(shù)相關(guān)學(xué)問，介紹的特別詳解，具有參考借鑒價值，感愛好的伴侶一起學(xué)習(xí)吧 通過函數(shù)完成下載文件的PHP功能代碼 function download($url, $filename) / 獲得文件大小, 防止超過2G的文件, 用sprintf來讀 $filesize = sprintf ( %u, filesize ( $url ) ); if (! $filesize) return; header ( Content-type:application/octet-streamn ); /application/octet

2、-stream header ( Content-type:unknown/unknown; ); header ( Content-disposition: attachment; filename= . $filename . ); header ( Content-transfer-encoding: binary ); if ($range = getenv ( HTTP_RANGE ) / 當(dāng)有偏移量的時候，采納206的斷點續(xù)傳頭 $range = explode ( =, $range ); $range = $range 1; header ( HTTP/1.1 206 Part

3、ial Content ); header ( Date: . gmdate ( D, d M Y H:i:s ) . GMT ); header ( Last-Modified: . gmdate ( D, d M Y H:i:s, filemtime ( $url ) ) . GMT ); header ( Accept-Ranges: bytes ); header ( Content-Length: . ($filesize - $range) ); header ( Content-Range: bytes . $range . ($filesize - 1) . / . $file

4、size ); header ( Connection: close . nn ); else header ( Content-Length: . $filesize . nn ); $range = 0; loadFile ( $url ); function loadFile($filename, $retbytes = true) $buffer = ; $cnt = 0; $handle = fopen ( $filename, rb ); if ($handle = false) return false; while ( ! feof ( $handle ) ) $buffer = fread ( $handle, 1024 * 1024 ); echo $buffer; ob_flush (); flush (); if ($retbytes) $cnt += strlen ( $buffer ); $status = fclose ( $handle ); if ($retbytes $status) return $cnt; / return num. bytes delivered like readfile() does. return $status; 輸入2個參數(shù)即