SplFileObject::rewind()

(PHP 5 >= 5.1.0, PHP 7)

Rewind the file to the first line

说明

publicSplFileObject::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

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