php sleep



si l'appel est interrompu par un signal, la fonction sleep() retournera une valeur différente de zéro. sous windows, la valeur sera toujours de (la valeur de la constante wait_io_completion de l'api windows). sous les autres plateformes, la valeur retournée sera le nombre de secondes restantes à la fonction 

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the idea of sleep and usleep is that by letting the cpu run a few idle cycles so the other programs can have some cycles run of their own. what results in better response times and lower overall systemload. so if you have to wait for something, go to sleep for a few seconds instead of occupying the cpu while doing absolute  return value: returns on success, or false on error. this function returns a nonzero value if the call was interrupted by a signal. on windows, this value will always be , which is the value of the wait_io_completion constant within the windows api. on other platforms, the return value will be the number of 

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example. delay execution of the current script for seconds ( microseconds):. <?php echo date('h:i:s') . " "; sleep for seconds usleep(); start again echo date('h:i:s'); ?> run example »  this is your only pratical alternative: usleep delay execution in microseconds. so to sleep for two miliseconds: usleep( );. to sleep for a quater of a second: usleep( );. note that sleep() works with integers, sleep(.) would execute as sleep() meaning this function would finish immediatly. $i = ; while( $i 

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i've got the cheapest php hosting package i could find for my last project and it does not behave like this. i would not pay for a service which did. indeed, i'm stumped to even know how i could configure a server to replicate this behaviour. regardless of why it behaves this way, adding a sleep in the  one place where it finds use is to create a delay. lets say you've built a crawler that uses curl file_get_contents to get remote pages. now you don't want to bombard the remote server with too many requests in short time. so you introduce a delay between consecutive requests. sleep takes the argument in 

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flush your buffer (update): <? $response = $_post[response]; echo "
".$response; ob_end_flush(); flush(); if (strpos($response,'no') !== false) { sleep(); echo "
"; echo 'why not?'; } ?> references: php.net/manual/en/function.obflush.php, php.net/flush. si l'appel est interrompu par un signal, la fonction sleep() retournera une valeur différente de zéro. sous windows, la valeur sera toujours de (la valeur de la constante wait_io_completion de l'api windows). sous les autres plateformes, la valeur retournée sera le nombre de secondes restantes à la fonction 

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void sleep ( int seconds). void usleep ( int micro_seconds). when you want to pause execution in your script, there are two ways you can implement the code. some people (thankfully very few) choose the first option and write code like this: time()) { do nothing } echo "done.\n"; ?>.

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