PHP5中文手册·Delay execution -- 追寻梦想＞编程乐园＞PHP 编程

int sleep ( int $seconds )

Delays the program execution for the given number of seconds .

Returns zero on success, or FALSE on errors.

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

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


	PHP5中文手册 show_source sys_getloadavg 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() show_source sys_getloadavg Misc. PHP Manual