how to call a function in PHP after 10 seconds of the page load (Not using HTML)

Question

Is there any way to call a function for every 10 seconds of 10 seconds after the page load in PHP. (Not using HTML.)

Thanks in Advance.

FEro

Answer 1

if you mean after the page has loaded you will need to use javascript/ajax/jquery to do so.

Answer 2

You can create a Javascript timer that calls the function every ten seconds.

Tutorial here

(10 seconds is 10000 milliseconds)

Answer 3

PHP is a server side scripting language. If you need to check if something has loaded already in the client side, you will need a client-side scripting language like JavaScript.

You might need to use jQuery for your purpose to simplify things. jQuery is a

fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery is designed to change the way that you write JavaScript.

First, download jQuery. In the head tag of your HTML, add this:

<script type="text/javascript" src="jquery.js"></script>          
<script type="text/javascript">

// Check if the page has loaded completely                                         
$(document).ready( function() { 
    setTimeout( function() { 
        $('#some_id').load('index.php'); 
    }, 10000); 
}); 
</script>

In the body of your HTML, add this:

<div id="some_id"></div>

Edited to remove bug

Answer 4

There's no way you can do it with PHP, except maybe using some crontab / loop with sleep() and file_get_contents(). Or use javascript/ajax as previously mentioned.

Answer 5

Not really, no. 10 seconds after your page loaded is (at least) 10 seconds after your PHP script finished, i.e. it is no longer running (apart from tricks that try keeping the connection open, which I don't think will work for a time as long as 10 seconds)!

Therefore, you either need to schedule a cron job on the server side to fire in 10 seconds, or you need a callback from the website, using AJAX.

Answer 6

Php is a servide scripting language, and can't detect if the page is loaded or not. so you have to use client side script javascript.

Answer 7

The closest think I can think of is :

Once your script has finish to execute, it saves an entry in a databases with the time. Then, a daemon (cron style) execute every second each instruction in the databases that is older than 10 seconds.

Answer 8

This code works. Edited from randell's answer.

$(document).ready(function() { setTimeout(function() { $('#some_id').load('index.php'); }, 10000); });

Thanks to randell

Answer 9

If I interpret your question as "My page takes a long time to generate, now can I call a PHP function every 10 seconds while it generates" then there are several ways you can approach this...

Time your loop, do something after 10 seconds of work...

$nexttick=time()+10;
$active=true;

while ($active)
{
    if (time()>=$nexttick)
    {
        my_tick_function();
        $nexttick=time()+10;
    }

    //now do some useful processing
    $active=do_some_work();
}

It's possible to use a technique like this to implement a progress meter for long running operations, by having your "tick" function output some javascript to update the HTML representing a progress meter.

Using pcntl_alarm...

Alternatively, if you have the Process Control support enabled in your build of PHP, you might be able to use pcntl_alarm to call a signal handler after a certain amount of time has elapsed.

Using ticks...

You can use the declare construct along with register_tick_function to have the PHP engine call your function every x 'ticks'. From the manual:

A tick is an event that occurs for every N low-level tickable statements executed by the parser within the declare block. The value for N is specified using ticks=N within the declare blocks's directive section.

Answer 10

If you really must do it within the same PHP script, the cleanest way would be a fork.

Or if that's not possible, here's a really bad hackish way of doing it:

<?php
ignore_user_abort(1);

page_output_stuff();
// ...

flush();
sleep(10);
do_something_after_script();
?>

If you're doing this to output stuff to the user after a delay, the above can be made to work but it's a really ugly way of doing it. Just use AJAX instead.

Answer 11

This seems weird idea but maybe it's what you are looking for if you want to do it in PHP without touching HTML/JS:

<?php
your_website_here();

flush(); //this sends the output to the client. You may also need ob_flush();
sleep(10); //wait 10 seconds

your_func_here();
?>

The above is preety OK in theory, but in practice it will result in VERY memory consuming app. So be warned.

And please don't downvote me, this is only a theoretical dispute.