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Homephp教程php手册fpassthru -输出所有剩余的数据文件指针

fpassthru -输出所有剩余的数据文件指针  

fpassthru
( PHP 4中, PHP 5中)

fpassthru -输出所有剩余的数据文件指针

描述
国际fpassthru (资源$处理)
读取EOF分析的特定文件指针从当前的位置和结果写入到输出缓冲区。

您可能需要请倒带( )重置文件指针的开头的文件如果您已经写入数据文件。

如果您只想转储文件内容的输出缓冲区,而不首先修改或寻求特定抵消,您可能会想要使用readfile ( ) ,从而节省您fopen ( )函数的调用。

参数

把柄
文件指针必须有效,必须指向一个文件成功打开fopen ( )或者fsockopen ( ) (和尚未关闭fclose ( ) ) 。


返回值
如果出现错误, fpassthru ( )返回FALSE 。否则, fpassthru ( )返回的字符数读取处理和通过输出。

实例

例如# 1使用fpassthru ( )与二进制文件

// open the file in a binary mode
$name = './img/ok.png';
$fp = fopen($name, 'rb');

// send the right headers
header("Content-Type: image/png");
header("Content-Length: " . filesize($name));

// dump the picture and stop the script
fpassthru($fp);
exit;

?>


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