Question

PHP Wait timer?

Asked by: JuniorBee

I have a page in PHP that accesses an XMLRPC Server.  However, sometimes it does not display the response from the server, and sometimes it does...but it ALWAYS ALWAYS reaches the server because I see the data pass on the other end.  And the data is passed TWICE for some reason too!!

How can I make the page wait for a few seconds, then proceed?  Is there a comman in PHP to make the page wait or a timer?

Thanks

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Asked On
2006-03-05 at 16:01:12ID21761569
Tags

php

,

wait

Topic

PHP Scripting Language

Participating Experts
5
Points
500
Comments
5

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Answers

 

by: ZylochPosted on 2006-03-05 at 16:09:18ID: 16110223

Hi JuniorBee,

You can try:

sleep(NUMBER_OF_SECONDS);

or

usleep(NUMBER_OF_MS);

Regards,
Ted

 

by: askanthonysPosted on 2006-03-05 at 16:14:08ID: 16110250

while using sleep you may also need to adjust the 30 second run time limit so that it isn't exceeded while sleeping

set_time_limit(number of seconds to limit the runtime of the current file to);

 

by: NubKnacker2kPosted on 2006-03-05 at 22:56:45ID: 16112167

I'm not sure how you have implemented the model but an easy way is to just poll the call, check if it's returning any output and keep looping(or sleeping with sleep()) till it does. To prevent your script from timing out make sure you send some data to the browser and then flush it. The basic code would be:

echo "Waiting for response from server .... <br />";
flush();

Remmeber to flush so that the data is sent forcibly to the browser.

 

by: TeRReFPosted on 2006-03-06 at 00:42:33ID: 16112503

NubKnacker2k's idea is a good one. I just want to add that in many cases, just using flush(); is not enough. You'll need to add ob_flush(); as well... So:

echo "Waiting for response from server .... <br />";
ob_flush();
flush();

 

by: fiboPosted on 2006-03-06 at 03:48:44ID: 16113394

alternatively, if you are launching the query from a web page you could use a JavaScript wait and loop: thus, you would not have the problem of maximum run times for php scripts
<?php
...
$wait_delay= 10000; //milliseconds... some tuning neeeded!
$comd="<script language='JavaScript' type='text/javascript'>window.setTimeout('location.href=";
$comd .= '"' .$_SERVER['PHP_SELF'].'"'. ",100+$wait_delay);</script>\n");
$comd .= "<noscript>\n";
echo $comd;
...

20120131-EE-VQP-002

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