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Sleep() In The Background


how much the sleep() which is set to no limit can consume the system resource. Could it cause to hang the server? I tried the following and couldnot see the server got busy. Although the browser seemed to be so, if I access to a different page, it responded very quick as usual. It's not a big deal, is it? sleep.php PHP Code:

<?php
set_time_limit(0);
sleep(0);
?>

fork_sleep.php

PHP Code:

<?php
$str = "php -f sleep.php";
exec("$str > /dev/null &");
?>




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Related Forum Messages:
PHP Sleep()
I've been sitting for quite a while now, reading the sleep() manual and tried to turn the code upside down and inside out but nothing helps... I want the current page to wait a few seconds before it is directed to another ( after a successfull registration ). So i thought the best way to do that is to use sleep().

However, this does work to a certain point ... the current page waits for 5 seconds, but the text I want to show the user in the meantime doesn't show? Why? Without the sleep() and the header() it shows without any problem. Code:

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Sleep()
I tried to make a script which would print a line of text at 1 line per second or whatever time i put. So i went ahead and tried this. PHP Code:

echo "Passwords match.";
        sleep(1);
    echo "Passwords match.";
        sleep(1);
    echo "Passwords match.";
        sleep(1);
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PHP Messaging And Sleep
I would like to get my php script to send a message to a user for example to notify that a DB update or insert has been successful or not. After that the script will be redirected to the home page.

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Fsocketopen & Sleep
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Sleep And Max_Execution_Time
I have the following code:

$i=0;
while($i++<15) {
   mail("rantsh@hotmail.com",date("d m Y H:i:s"),"This is email # $i ");
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Now, I know my server has a 30 second max_execution_time setting... nonetheless, this code runs successfully!!!. Now, this is actually better for me (for the application I need to run)... Yet I'm concerned of why it's being allowed to run for 15 minutes if max_execution_time is set to 30. Code:

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Would I Use Sleep To Delay
I am making a site for a friend, but with his PHP it always renders too quick and I would like it to wait a bit for the rest of the page to load,

otherwise its a bunch of annoying gaps and whacked alignment as the CSS and images load and it all just looks annoying as it loads. And it takes away from the order of of information outputted as it goes through the PHP when your focused on the tripped out layout.

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Sleep Function
I'm playing about with delaying results of a PHP program. I want to print some results then wait for a few seconds and print some more. I have found the php sleep function however have a small problem.

<?php
echo ("The time in 3 seconds from page loading:
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sleep(3);
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?>

The above script is meant to print the top line, wait 3 seconds and print the bottom line. Infact, it starts, waits 3 seconds and prints all at once.

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Sleep For 10 Seconds Help
I am trying to run it will load an iframe for every entry found in my DB, I am trying to make it sleep for 10 seconds between each iframe with: PHP Code:

sleep(10);

PHP Code:

$train = "<table width=800 bgcolor=F0F0F0 aling=center><tr><td colspan=4>&nbsp;&nbsp;&nbsp;$pages<br></td></tr>";
$i=0;
while ($addall = mysql_fetch_assoc($res))
{
    if ($i/2 == ceil($i/2)) $train .= "<tr>";
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$train .= "<td width=120 valign=top><BR><iframe src="potspace.php?u=$addall[intId]" width="400"></iframe>";
}
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Session Timeout, Use Of Sleep Ect...
I have a custom script that uses sessions to track UID's. The only problem I have with the script is that the session times out in 1440 (min?) which I believe is 24 min. I was thinking that I could use php's sleep to hold off from doing a refresh until minute 20.

Unfortunately, I have also read that using sleep can leave a server open to a DoS attack.
I do not have access to the php.ini file to be able to change the timeout variable for the session. What is the best way to keep a session open without changing the .ini variable. Is sleep a good way do go about it, and if so, are there significant security risks in using sleep()?

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Sleep() Affects The Variables?
could it be that the sleep() function affects my variables? When I set a very long delay time (1-3 hours) in my CronJob PHP4 script (of couse with a big set_time_limit) some of my variables go lost! But there's no problem with short times in the sleep-function (1-5 min).

set_time_limit(86400);
for($x=1;$x<5;$x++) {
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sleep(7200);}

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Need To Flush Before Sleep But I'm Blank.
I'm new to php and am converting a bunch of asp pages to php.

Current problem :

I am using a Submit button on a form to POST ( send the database variables )
to a php page that will send a personalised e-mail to each client.

On the php page,
I am looping through a database,
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After the mail has been sent, I need to wait for 4 seconds before continuing
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I am using this code after the mail has been sent :

echo "Mail Sent to : " . $row['CliName'];
ob_flush();
flush();
sleep(4);

Problem is, that nothing appears after I click on the Submit button on the
first page's form ( the first page just remains on the screen ). Once the
database has been looped, the entire (correct) output appears on my screen -
but I need to see some sort of progress as it works it's way through the
database.



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Sleep Function Or Any Thing Like?
i wanna make search page when you submit the search form it will direct you to search page but before the search starts i wanna make it waiting how can i make this.

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Sleep(900) ? Delayed Query... ?
Trying to set a marker in a MySQL table on our Primary host (WAMP stack) indicating whether or not there is current User Activity -- ON THAT SERVER -- as a signal to remote Secondary -- tablet pc based servers to skip scheduled database synchronization with the Primary. Code:

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Sleep(), Exec() And MySQL
How to create dynamically generated table .....

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Sleep() And Browser Load.
is there a way to get around the browser continually acting like they are loading when using sleep()? It says the page is still loading but it really isn't because we are causing a delay for some data on purpose with php.

So it is for an intentional reason that we cause it. Many of us like using sleep(). Anyway to do it without the browsers showing the page is still loading? There must be a way, so many programmers for intense programming use sleep(), I can't imagine they have to deal with the browsers loading prompts whenever they do.

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Staggering Execution With Sleep()
For my site, currently in development, I will be hosting some latest RSS picks from friend websites. To start with there will only be a couple, but eventually I hope to be sourcing from up to 50 partner blogs.

Obviously, i dont want to make a request on every page load, so I would instead cache data from the past half hour/hour.

I will be using CRON to schedule an update every so often, but having a single script making 50 requests one after the other then processing and storing the data may be taxing, especially if the outside server is slow.

I thought about using sleep() to leave gaps between each request so that a sudden hogging of resources doesnt happen every hour.

What are your views on this method? Is it feasable (and possibly even a good idea), or should I just get it all to execute in one go?

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Processlist Sleep Command
a couple times i have notice the command sleep, with times like 200 or even 1700, what might be the cause of this? anyone know?


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I want to use the Sleep() function in a script that may run multiple times, but i dont want hte system to crash or be overloaded with scripts in memory. When the script enters a sleep mode, what happens to the script? is it resident in memory? if so could i experience the system bogging down if there were 100+ scripts resident in memory or are they just sitting there doing nothing until they run again?

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I'm running a community website where I send out weekly newsletters to all of my clients. However, I'm sure my hosting provider wouldn't be so happy if I just FOR LOOP and send it all out at once.

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i am trying to insert a sleep command in my loop every 100 rows, the below works for every 2 but if i try to sleep every 100 rows it will not work.

if($i % 2) {
sleep(5);
}

does not work

[php]
if($i % 100) {
sleep(5);
}
[/php

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The script I'm writing needs to wait a random amount of time (1-300s)
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while(condition) {
do something
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sleep(rand(1,300));
}

Problem is, a browser times out if it doesn't get an answer within
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Putty Processlist Command Sleep
I'm using php with mysql. I am connecting through putty and I run the command for processlist. Lately I am seeing many threads with the command "sleep" in them. My site and the database are running smoothly, but I am seeing up to 200-300 threads like this with the command "sleep". Can anyone tell me what may be causing this and how do I resolve it? Or is it normal to see this when your site grows to a certain size?

Code: ......

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Require_once And Fatal Errors... Automatic Sleep And Try Again Anyone?
I have a PHP page which loads OK 80% of the time. However
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Fatal error: Failed opening required 'DB.php'

This really bugs me, especially since the only reason
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would like to add code so that instead of displaying
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then retry, and repeat until the file can be opened.

It seems strange to me that server load would prevent
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I can improve the situation?

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In Background
Here's my situation. I'm creating a website (basically a store) and in the admin section users will want to download zip files of images or products added in the last 7 days, last 2 weeks and the last month.

I have scripted a cron to run every 24 hours to zip all the images and this process takes over 1 minute (there's over 6,000 images!!) and the size of this is 250MB. This has now taken me to my quota on my webspace of 500MB (including all the individual images)

I have decided the only way to do this is dynamically create the zip when the user requests it. As PHP times out after 30 seconds it needs to do it's stuff in the background and display a message saying something like' We'll email you with the zip file in 5 minutes or so'.

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Run In The Background?
I have a script on my website that takes a long time to run, and it's slowing down my pages. Theres nothing I can do about the wait time on the file.

Is there a way to use include or fopen or anything along those lines, to have it execute my file in the background; without having the file that's executing it waiting for it to finish its thing? Or to have the expected output redirected to another file (as mentioned in http://ca3.php.net/manual/en/function.exec.php)?

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Running Background Job...
Is it possible to get a php3 script to check what day it is, and then do some stuff, If it’s let’s say Monday?
This without you doing anything. Like a background - or cronjob…
I guess you would use perl or something to do this, but that is not an option I have.

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Background Processing
What is the technique you use for background processing? Like when user submit a task, the user could then wait for the result by email or through a result page.

I'm wondering how would they do that?

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Background Color
I am totally baffled by what is happening in my code. I have a section
of code (shown below with two comment lines inserted). They are
essentially identical text boxes (names and variables different). Yet,
the first comes up with a white background and the second comes up with
a yellow/gold background....

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Run Process In Background
I want to run process from my php script in background.
I try different functions from functions list but all of them whaiting for
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Background Processes
I'd like to know how to send an external process to the background, so that I can run multiple instances of the same process at one time. Any tips, links.. etc?

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Php Running In The Background?
In order to run a php script - do I need to access it via a browser? Is there a way to write a php script and let it run from the shell in the background?

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Running Php In The Background
I am trying to run a php executable (GTK) from a browser... now exec() does the job, but the browser hangs waiting for the .exe I have just called to finish, I assume so it can 'report back' to exec(),

any ideas how I can get around this ? - I have tried backticks,passthru,system,exec - all with the same results, i.e. they all expect a returned value and sit around waiting for it. This is a windows app so /dev/null wont help & it is not a CGI with output I can dump anyway.

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Run A Php In The Background Using Http
i have a script (script1) which needs to call another script (script2).
It should not wait for the answer, so script2 should run in the background.

I really need to call the php script using:
http://urlof myscript/script2.php

I don't want to use it as a cgi and use CLI.

I did a test with fsockopen and curl and a timeout of 10 seconds and call
http://urlof myscript/script1.php from my browser:
Script1 stops after 10 seconds => OK
Script2 has been called by script1 and continue to run in the background
=>OK
After 60 seconds Script2 is killed by php!! => KO :(

The script is working fine if i call http://urlof myscript/script2.php from
my browser. It needs around 120 seconds to finish.

Why is it stopping after 60 seconds when I use fsockopen and call it from
script1?

Here is the script in SCRIPT1:
$fp = fsockopen("$host", 80, $errno, $errstr, 30);
stream_set_timeout($fp,10);
if (!$fp) {
echo "$errstr ($errno)<br />
";
} else {
$out = "GET $path HTTP/1.1
";
$out .= "Host: $host
";
$out .= "Connection: Close

";

fwrite($fp, $out);
$status = socket_get_status($fp);

while (!feof($fp) && !$status['timed_out']) {
echo fgets($fp, 128);
$status = socket_get_status($fp);
}
fclose($fp);
}

I have added this in SCRIPT2:
ignore_user_abort(FALSE); // becareful, FALSE really means it should ignore
user abort !!!
set_time_limit (120);
ini_set("max_input_time",120);
ini_set("max_execution_time",120);

Do you have any idea?

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I am using php_move_file to upload some files to the server. I want to
be able to support large files. But the Apache settings is that after
90 sec. the connections resets. This becomes a problem with large
files (slow links). Is there anyway to write a script that would
refresh in the background....

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A Way To Get Current Background?
I have several websites running on a global script. Some pages, the backgrounds black, other, white. Sometimes people have the taste of posting black font on a black background, or white font on a white background.

What I wanted is to know if theres a way to 'check' the current background color? Because I can then add in the script to 'change' any incorrect colors before posting. I'm not sure if theres a way for PHP to tap into CSS and check, but it would be alot easier to change the global script since its *Checking* for the background color rather then me do it per site and change it manually.

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Background Redirection
I need to create a redirection from a php page to another, without having a web browser opened.

Imagine that you make a php starting via command line or cron job, then your php is running in background and no web browser is open on it. How can this php (from the background, with no web browser opened) call (trigger) another php? please note that I'm not talking about include.

I need that the background php gives control to ANOTHER php url . per what I tested the php 'header' command does not work and obviously also any javascript redirection cannot work because there is no web browser opened. so, finally, how can that php running in background call another php url?

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Using SWF Files As Background
Im not sure if it posilbe, but im trying to get a SWF file as the background of my page, but the swf file is dynamically named.  Its like a gallery and when a user clicks on the lick to that file, it displays the image /swf.  but i want the file to appear as the background. code:

echo "<body background = '".$POST['file_name']."'>";

ii have 3 files so far.  file1, 2, 3 .swf.  and i can easily view each one as a seperate file, and they work once i embed them as images. is this my php code, or do i have to look at my browser to display the swf as BG..?

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Background Running
I have a php script. It basically fetches data from MySql DB, processes it, and updates the results back in the Database. There are some 18k rows in the DB. The processing involves querying some remote servers.

What is the MOST efficient method to run the script in background ?

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Random Background In PHP
Not sure if this can be done in PHP but I'm looking at giving users an option to choose a background image from a list ie when they click on a url it changes. If you click on the links to change of scene on the left hand column, you'll hopefully see what I mean.

Can this be done in PHP? I've tried googling it, searching on various forums but can't seem to find anything..

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Background Tasks
I'm using some weather rss feeds in a web site. The feeds are updated once every hour and cached in a local file. My problem is that every time the weather report is updating I get a long wait (not that long.. 2 or 3 secs) before the page is displayed.

This happens becauses the teplate engine that parses the page is waiting for the weather section to be parsed and cached. Is there a ay I can start the weather parsing as a background thread and return immediatly to the template engine to continue to parse the page? And if so How?

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Background Image
i created a calendar in php. i have this calendar displayed on another php page (index.php).

i added a background image to the calendar. it displays fine on the calendar alone but it won't display as a background image when i display it on index.php.

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Run PHP-Script In Background
I am using php 5.0.4 under IIS 6 under Windows Server 2003 and want to
run a php-script as a separate process. This schript dies not have any
output. I tried several variants without success:

exec("c/php5/php.exe path/to/script parameters &") will run the schript
but will wait until the schript finished processing.

exec("c/php5/php.exe path/to/script parameters > null &") gives me the
error message "The specified CGI application exceeded the allowed time
for processing. The server has deleted the process."

Dealing with other variants of php cli procesors like php-win.exe gave
the same result. Also trying to use the start command did not help. My
head is burned out, what else could run my script under this
environment?

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Transparent Background
i'll try to explain myself the best i can, here is the problem:

i have a html page and inside this i want to put an iframe that contains a php page. That's ok, i can do it and it works, but the problem is that i can't make that php document to have transparent background.

it turns white. Is it because of the iframe? the php document has transparent background, but when i see it inside the iframe it doesn't work.

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I am designing with flash and am sending variables on the end of a url to a php document which also contains a swf - I want to tell the php file what color to make the background in the html section I have:-

<body bgcolor="<?php echo $bgcol">>

I've tried moving the quote marks around but nothing seems to work - I also use php in the title and that is working fine - is it because it is inside a tag or something or do I have the wrong syntax?

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Repeating My Background
i have a problem with repeating my background yet not haveing 2 images show. what is wrong in this code:

<style type="text/css">
<!--
html {
background-image: #FFFFFF url(http://www.runnerselite.com/images/linedown.jpg);
background-repeat: repeat-y;
background-position:0px 155px;}

body,td,th {
font-family: Verdana, Arial, Helvetica, sans-serif;
}
body {
background-image: transparent url(http://www.runnerselite.com/images/line.jpg);
background-repeat: repeat-y;
background-position:15px 0px;


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Execution In The Background
I want a php script to be executed in the background when the admin presses a button in an application which is running on a Linux environment. This page execution will take a long time(Maybe 16 hours).

There I want the window in which the administrator presses the button to display logs of the background executing script after this script has been started. How do you go about acheiving this?

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Table Background
I know this is a php forum but since i hang out here more than anywhere else i was hopping you guys could help me out. i just started this site today but i am trying to get this background picture in the table on the right to keep from repeating:

http://box1.no-ip.info/rpm

like i said i just started today so its nothing impressive at all. also the entire content will be driven by a cms engine im working on so what you see in that link is just hard coded for now.

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Background POST
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$_POST In Background
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I have a site I want to post some variables to that returns xml which I parse and use in my script but i'm not sure if its possible to send the POST variables behind the scenes so it stays on my site.

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Task On A Background
I have a script that inputs/updates db from submitted form. I just added another code that sends email messages to a number of users that may be affected by the posted information. I put this script right before in run a db query and it's basically a loop that matches appropriate accounts and sends an email. Depending on how many accounts are affected it may take a little while before the pages returns back to the original one with the form. I was thinking that perhaps I could take the email script and put it into a separate page and trigger it at the same time.

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Alternating Background
<?php
$i=0;
while ($i < $num) {

$name=mysql_result($result,$i,"name");
$type=mysql_result($result,$i,"type");
$creator=mysql_result($result,$i,"creator");
$added=mysql_result($result,$i,"added");
$description=mysql_result($result,$i,"description");
$id=mysql_result($result,$i,"id");

?>
<tr>
<td>2<font face="Arial, Helvetica, sans-serif"><? echo "$id"; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><? echo "$name"; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><? echo "$type"; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><? echo "$creator"; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><? echo "$added"; ?></font></td>
<td><font face="Arial, Helvetica, sans-serif"><? echo "$description"; ?></font></td>

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