php教程

SplFileObject::rewind

(PHP 5 >= 5.1.0, PHP 7)

SplFileObject::rewindRewind the file to the first line

说明

public SplFileObject::rewind ( void ) : void

Rewinds the file back to the first line.

参数

此函数没有参数。

返回值

没有返回值。

错误/异常

Throws a RuntimeException if cannot be rewound.

范例

Example #1 SplFileObject::rewind() example

<?php
$file 
= new SplFileObject("misc.txt");

// Loop over whole file
foreach ($file as $line) { }

// Rewind to first line
$file->rewind();

// Output first line
echo $file->current();
?>

参见

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