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
