本文实例讲述了PHP实现HTTP断点续传的方法。分享给大家供大家参考。具体实现方法如下:
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<?php
/**
* PHP-HTTP断点续传实现
* @param string $path: 文件所在路径
* @param string $file: 文件名
* @return void
*/
function download( $path , $file ) {
$real = $path . '/' . $file ;
if (! file_exists ( $real )) {
return false;
}
$size = filesize ( $real );
$size2 = $size -1;
$range = 0;
if (isset( $_SERVER [ 'HTTP_RANGE' ])) {
header( 'HTTP /1.1 206 Partial Content' );
$range = str_replace ( '=' , '-' , $_SERVER [ 'HTTP_RANGE' ]);
$range = explode ( '-' , $range );
$range = trim( $range [1]);
header( 'Content-Length:' . $size );
header( 'Content-Range: bytes ' . $range . '-' . $size2 . '/' . $size );
} else {
header( 'Content-Length:' . $size );
header( 'Content-Range: bytes 0-' . $size2 . '/' . $size );
}
header( 'Accenpt-Ranges: bytes' );
header( 'application/octet-stream' );
header( "Cache-control: public" );
header( "Pragma: public" );
//解决在IE中下载时中文乱码问题
$ua = $_SERVER [ 'HTTP_USER_AGENT' ];
if (preg_match( '/MSIE/' , $ua )) {
$ie_filename = str_replace ( '+' , '%20' ,urlencode( $file ));
header( 'Content-Dispositon:attachment; filename=' . $ie_filename );
} else {
header( 'Content-Dispositon:attachment; filename=' . $file );
}
$fp = fopen ( $real , 'rb+' );
fseek ( $fp , $range );
while (! feof ( $fp )) {
set_time_limit(0);
print ( fread ( $fp ,1024));
flush ();
ob_flush();
}
fclose( $fp );
}
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希望本文所述对大家的php程序设计有所帮助。