PHP - Sleep Or Usleep Calls Make Script Sleep For Ever

Well PHP manual says that the script execution will be delayed by $x seconds if you write a codes like this:

Code: [Select]
$x = 5; //5 secs
sleep($x);

Now I have this script in which I write the four lines to the screen one by one, each should be delayed by 5 secs after the last line is output to the screen. It does not work out at all...

Code: [Select]
echo "Update setting 1:";
sleep(5);
echo "Success! <br>Updating setting 2";
sleep(5);
echo "Success! <br>Updating setting 3";
sleep(5);
echo "Success! <br>Updating setting 4";

Instead, the entire script execution is delayed by 15 secs, with all four lines output at the same time. Why is this happening? Is there a way to fix it? Please help...

I want the login script to echo out a statement, and then after 5 seconds (if the user hasn't clicked the link manually) I want it to redirect with the header redirect. I'm using the sleep function for the delay of the redirect. Here's the concerned portion of the login script:

// check to see if the INPUT DATA matches the DATABASE COLUMNS!

if ($nickname == $dbuser_name && sha1($password) == $dbuser_password) {

// set a session after login

$_SESSION['user_name'] = $dbuser_name;

$_SESSION['user_id'] = $dbuser_id;

echo "<center>You're logged in! 

<a href='01.php'>Click here</a> to go to the main page.</center>";

sleep(5); // seconds to wait

header ('Location: 01.php');

// password incorrect error message

} else {

echo "<center>Incorrect password!</center>";

}


But the echo statement never gets printed out, any idea why it gets swallowed by the sleep function?

Hi All,

I'm new to PHP and I'm probably making a fundamental mistake somewhere, however, enough time wasted, I thought you might be able to shed some light on my problem.

I basically have a php script running with nginx and fast_cgi. The whole script is just a large switch statement that does some matching against the request strings and returns a template rendered by Tenjin. It all works fine and it's quite performant based on a simple curl-loader test.
The simple performance figures are taken from curl-loader and show 400 CAPS (Call Attempts Per Second).
The test is 200 clients requesting the same url for 100 cycles.

The problem arises when I introduce a "sleep" into the php code for 150 milliseconds, which is my basic idea of introducing latency to the system. The performance for the same test of 200 clients * 100 cycles produces 55 CAPS which is a huge drop in performance based on 150 millisecond delay. The sleep method used is "usleep" and I've also tried "time_nanosleep".

I know there's not a huge amount of info there but based on performance figures above, is there something fundamental/trivial I'm missing or doing??? Are there any known issues with the sleep methods???

I've tried setting 'set_time_limit(0)' before the sleep call but that didn't help. Any advice you can offer is greatly appreciated..

I'm using a program to connect to a website. This program has one bug in it, if it receives data more then 500 bytes it crashes.
So on my website I've been using "usleep(100000);" which helps break up the data. Is there any other functions that can split up sending data without any type of delay?

Also would a really highspeed internet put the data together with that current usleep, because with my speed it splits it up just fine.

Hi all,

I post a strange behavior that could be reproduced (at least on apache2+php5).
I don't know if I am doing wrong but let me explain what I try to achieve.

I need to send chunks of binary data (let's say 30) and analyze the average Kbit/s at the end :

I sum each chunk output time, each chunk size, and perform my Kbit/s calculation at the end.

Code: [Select]
<?php

// build my binary chunk
$var= '';
$o=9000;
while($o--)
{
$var.= "testtest";
}

// get the size, prepare the memory.
$size = strlen($var);
$tt_sent = 0;
$tt_time = 0;

// I send my chunk 30 times
for ($i = 0; $i < 30; $i++)
{
// start time
$t = microtime(true);
echo $var."\n";
ob_flush();
flush();
$e = microtime(true);
// end time
// the difference should reprenent what it takes to the server to 
// transmit chunk to client right ?

// add this chuck bench to the total
$tt_time += round($e-$t,4);
$tt_sent += $size;
}

// total result
echo "\n total: ".(($tt_sent*8)/($tt_time)/1024)."\n";

?>

In this example above, it works so far ( on localhost, it oscillate from 7000 to 10000 Kbit/s through different tests).

Now, let's say I want to shape the transmission, because I know that the client will have enough of a chunk of data to process for a second.

I decide to use usleep(1000000), to mark a pause between chunk transmission.

Code: [Select]
<?php

// build my binary chunk
$var= '';
$o=9000;
while($o--)
{
$var.= "testtest";
}

// get the size, prepare the memory.
$size = strlen($var);
$tt_sent = 0;
$tt_time = 0;

// I send my chunk 30 times
for ($i = 0; $i < 30; $i++)
{
// start time
$t = microtime(true);
echo $var."\n";
ob_flush();
flush();
$e = microtime(true);
// end time
// the difference should reprenent what it takes to the server to 
// transmit chunk to client right ?

// add this chuck bench to the total
$tt_time += round($e-$t,4);
$tt_sent += $size;

usleep(1000000);
}

// total result
echo "\n total: ".(($tt_sent*8)/($tt_time)/1024)."\n";

?>

I am doing something wrong ? Does the buffer output is not synchronous ?

Thanks a Lot


Nunja

Okay so my news script is set to view only 10 pieces of news. But I want it so that it starts a new page once I have more than 10 pieces of news.

Code: [Select]
<?php
require("functions.php");
include("dbconnect.php");

session_start();

head1();
body1();
new_temp();
sotw();
navbar();
     
$start = 0;
$display = 10;
$query = "SELECT * FROM news ORDER BY id DESC LIMIT $start, $display";
$result = mysql_query( $query );

if ($result) {
    while( $row = @mysql_fetch_array( $result, MYSQL_ASSOC ) ) {
        news_box( $row['news'], $row['title'], $row['user'], $row['date'], $row['id'] );
    }
    mysql_free_result($result);
} else {
    news_box( 'Could not retrieve news entries!', 'Error', 'Error', 'Error');
}
                   
footer();

mysql_close($link);
?>
I tried a few things but they failed....miserably.

Hello, I need help in making my script loop indefinitely. Any ideas?

haw can I make a commit script , when I click on button the commit inserted in the table and browsed immediately without refresh the page , like Facebook commits  ? 

I read the tutorial, "Handling XML Data" and created this script from it. Excellent tutorial by the way

Here is my script:
Code: [Select]
<?php
// load SimpleXML
$fx = new SimpleXMLElement('http://www.boj.org.jm/uploads/fxrates.xml', null, true);

echo '<table><tr class="fx_header"><th class="fx_date">';
echo $fx->US[0]->DATE;
echo '</th><th class="fx_buy">Buy</th><th class="fx_sell">Sell</th></tr><tr class="fx_us"><td class="fx_legend">USD (&#38;#36;)</td><td class="fx_buy_sell">&#38;#36;';
echo $fx->US[0]->BUY;
echo '</td><td class="fx_buy_sell">&#38;#36;';
echo $fx->US[0]->SELL;
echo '</td></tr><tr class="fx_cad"><td class="fx_legend">CAD (&#38;#36;)</td><td class="fx_buy_sell">&#38;#36;';
echo $fx->CAD[0]->BUY;
echo '</td><td class="fx_buy_sell">&#38;#36;';
echo $fx->CAD[0]->SELL;
echo '</td></tr><tr class="fx_gbp"><td class="fx_legend">GBP (&#38;#163;)</td><td class="fx_buy_sell">&#38;#36;';
echo $fx->GBP[0]->BUY;
echo '</td><td class="fx_buy_sell">&#38;#36;';
echo $fx->GBP[0]->SELL;
echo '</td></tr></table>';
?>

This is the XML file that the script is reading from: http://www.boj.org.jm/uploads/fxrates.xml

This is the result page (which is just the way it should look): http://projects.wstudiographics.com/ewl/boj/fxrates.php

It works very well, but it take a bit of time to return the result. I think it's because of how the XML file data was set up. The thing is that I have no control over the xml data. I am only allowed to read it. I only need the first or rather latest instance of the data.

Any help on this will be greatly appreciated. Thanks in advanced.

Winchester (WStudio)

Hi guys, It's my first post here, not looking to leech, I'm simply here to learn and develop my skills and any contributes will be greatly appreciated!

Anyways I have made a simple login script, however I would like to make it more secure. However before that, can you please explain to me as to why it is not secure in the first place? A basic explanation so I can understand would be great.   

Then after that, could you please give help as to how I would make this login code more secure?

Thank you very much

Code: [Select]
<?php
   $rowsfound=false;
    if (isset($_GET['frmStudentId']))
    {
           // functions to make performQuery() work correctly
           require_once("dbfunctions.inc.php");
           $query = "SELECT dbStudentId, dbStudentName " .
           " FROM student " .
           " WHERE dbStudentId = '".$_GET['frmStudentId']."'" .
           " AND dbPassword = '".$_GET['frmPassword']."'";
           $result = performQuery($query);
           if(count($result) > 0)
           {
           $rowsfound=true; // allow login
           }
           }
// code continues by generating appropriate response ...

Seems to be a basic question, but I couldn't find an answer nor figure it out on my own.

Basically I have a script that takes out specific data out of the database, the script works on its own, now I just need a way to make the user execute it with a link or a button.

Example:
Category: [Smileys] - [Category2] - [Category3] - etc.

As soon as the user clicks on [Smileys] all data in the database which contains the word smileys in the category field gets selected and outputted as a list.

Again the script works, I just need to be able to execute it with a button.

If I understood it correctly I have to run the script by adding a
if (isset($_POST['Smileys'])) {
in front of the script.

But how do I build the connection with the text link?

Is there a good way to batch API calls?
I'm building a service that requires  n^2 api calls for each city I add.  Naturally, this is getting a bit clunky (6 cities is 36 separate calls).  I lieu of finding a better webservice that can consolidate this into one API call, is there a good way to batch these so I don't get fatal errors when one of these fails?

Ideally, I'd be able to loop the calls until results are returned for each.

Thanks

Hi,
Is it possible to return information on a cURL call. for example i want to kind of make my own API for my website cn i make a cURL call to my server and return data back to the client or is cURL just to send data.

if cURL is just to send data what is another method to send a request and receive data back on the call?

Thanks
Mike

Happy New Year, folks!

I am having an issue that's been dragging my life for quite some time. I am creating a website for my church maranatha.tv

The site's Menu and Content are pulled from a MySQL database I created. As far as this goes, everything is fine; content is pulled from my database with no issues.

My problem is as follow:
I am including an online bible, which is a third party script I downloaded. This scripts comes with its own database, which I have installed for use in my web server. I used Include() to include the index.php file of the online bible script, from its folder. I just don't know if this the right way to do it.

Of course, this script has its own folder and a set of files which makes up the entire bible script. I use an if condition so that when the user clicks on the menu button BIBLE, the script's index.php file is included instead of text from my database. This way of adding the third party script is rendering some unwanted results such as layout distortion (which I don't care at this point), broken links (main issue), and links (although broken) are sent to new pages, instead of staying within my site's CONTENT page template.

I need to find a way to make my script more modular so everything renders as intended. Here's my content function:
Code: [Select]
function content(){

// DETERMINE which page ID to USE in our query below ********************

if (!isset($_GET['jesusid'])) {

$pageid = '1';

} else {
$pageid = preg_replace('#[^0-9]#i', '', $_GET['jesusid']);} // filter everything but numbers for security)
//preg_replace($pattern, $replacement, $string);//preg_replace() Function structure

// Query the body section for the proper page
$query = mysql_query ("SELECT body_text,title,linklabel, author FROM content WHERE id = '$pageid' LIMIT 1 ") or die (mysql_error()); 

while ($row = mysql_fetch_array($query)) {

echo ucwords($row['title']).' por ';

echo '<b>'.$row['author']. '</b><br>';
        echo ucwords($row['body_text']);

//Add Bible Script
if (ucwords($row['title'])=='Biblia') //use row title -- UPPERCASED word
   {
     include ('bible/__WINDOWS/search.php');
   }

 }
}

?>
Just click on the BIBLE button, and then on any link within that page and you will see what I mean. I am still learning PHP and I don't have any background integrating third party scripts to an existing PHP website. I hope someone can help me.

Thanks in advance for your assistance.

Apparently, this is bad.  Wish someone would have told me.

Sadly, it is too simple.

I had
Code: [Select]
<?
$company=mysql_query("select this and that")
while($company=mysql_fetch_array($company)) {
   a bit of output;
   $properties=mysql_query("Select this and that from properties where company_id=$company['id']")
   while(properties=mysql_fetch_array()) {
        what I want to output
    }
}
I seem to be missing some understanding of what the heck to do now.

Please, please any suggestions.  I suck at object orientation, and arrays of arrays of arrays confuse the crap out of me.  Am I missing something simple.

Am I over-reacting?  I have 15 companies, and about 100 properties total.