Dear Here is your Problem Sol.
Set the number of seconds a script is allowed to run. If this is reached, the script returns a fatal error. The default limit is 30 seconds or, if it exists, the max_execution_time value defined in the php.ini.
When called, set_time_limit() restarts the timeout counter from zero. In other words, if the timeout is the default 30 seconds, and 25 seconds into script execution a call such as set_time_limit(20) is made, the script will run for a total of 45 seconds before timing out.
(Below is the script may be its help you dear)
<?php
set_time_limit(2);
?>
to the beginning of the script. Unfortunately, even two seconds of run time produced enough output to overload the memory available to my browser.
So, I wrote a short routine which would limit the execution time, and also limit the amount of output returned. I added this to the beginning of my script and it worked perfectly:
<?php
set_time_limit(2);
ob_start(); // buffer output
function shutdown () {
// print only first 2000 characters of output
$out = ob_get_clean();
print substr($out, 0, 2000);
}
register_shutdown_function('shutdown');
?>
If you use Apache you can change maximum execution time by .htaccess with this line
php_value max_execution_time 200
You can do set_time_limit(0); so that the script will run forever - however this is not recommended and your web server might catch you out with an imposed HTTP timeout (usually around 5 minutes).
You should check your web server's guides for more information about HTTP timeouts.
(Here some other script which helps you).
When using the set_time_limit() function, the browser will stop after about 30 seconds if it does not get new data. To prevent this, you can send every 10 seconds a little snippet of data (like a single character) to the browser. The code below is tested with both Internet Explorer and Firefox, so it will stay online all the time.
You should also create a file called chatdata.txt which contains the last thing said on a chatbox. Please note that you can also replace this function with a MySQL or other database function...
<?php
set_time_limit(900);
// Start output buffering
ob_start();
$message = "First test message";
$oldmessage = "bla";
// Keep on repeating this to prevent PHP from stopping the script
while (true)
{
$timeoutcounter = 0;
while ($message == $oldmessage)
{
// If 10 seconds elapsed, send a dot (or any other character)
if ($timeoutcounter == 10)
{
echo ".";
flush();
ob_flush();
$timeoutcounter = 0;
}
// Timeout executing
sleep(1);
// Check for a new message
$message = file_get_contents("chatdata.txt");
$timeoutcounter++;
}
// Keep the old message in mind
$oldmessage = $message;
// And send the message to the user
echo "<script>window.alert(\"" . $message . "\");</script>";
// Now, clear the output buffer
flush();
ob_flush();
}
?>
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