SplFileObject::rewind

(PHP 5 >= 5.1.0)

SplFileObject::rewind — Rewind the file to the first line

说明

public void SplFileObject::rewind ( 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

SplFileObject::current() - Retrieve current line of file
SplFileObject::key() - Get line number
SplFileObject::seek() - Seek to specified line
SplFileObject::next() - Read next line
SplFileObject::valid() - Not at EOF