Misc.
PHP Manual

sleep

(PHP 4, PHP 5)

sleep — Delay execution

说明

int sleep ( int $seconds )

Delays the program execution for the given number of seconds .

参数

seconds

Halt time in seconds.

返回值

Returns zero on success, or FALSE on errors.

错误/异常

If the specified number of seconds is negative, this function will generate a E_WARNING.

范例

Example#1 sleep() example

<?php

// current time
echo date('h:i:s') . "\n";

// sleep for 10 seconds
sleep(10);

// wake up !
echo date('h:i:s') . "\n";

?>

This example will output (after 10 seconds)

05:31:23
05:31:33

参见

usleep(), set_time_limit()


Misc.
PHP Manual