while ($i <= 100)

[soma56]

I'm new to PHP and for example purposes I've included this simple code:

 

$i = 1;
while ($i <= 10) {
    echo $i++; 
}

 

My question is simple. As my code is a little more complex it seems to load until the loop is true before "echoing" anything. Is there a function that allows me to "echo" each case as it's being created? My code seems to take "a while" to load and then echoes back everything at once.

[sspoke]

while loops run while everything is true  unless you do

 

while(!something) {
...
}

 

then you will keep looping falses until something is actually turns into true.. then it will stop!

[trq]

The web doesn't really work like that. Your response is generally built and then sent.

 

You can muck around with output buffering but its pretty unreliable at best.

[soma56]

Thank you for both of your responses. I will re-code to see if I can get the results I'm looking for.

[micah1701]

the point thorpe was touching on is  "Sever-side" verse "Client-side" scripts.  PHP runs on the server and the entire script is executed before its data is sent to the client-side, aka your browser.  If you want to have things happen on your browser's screen after the page has loaded from the server, you need to use a client-side script just as javascript.

[Daniel0]

It is possible doing something like it, assuming your web server is not setup to always buffer the output and that your browser doesn't try to load the entire thing first.

 

<?php
header('Content-type: text/plain');

$i = 1;
while ($i <= 100) {
        echo $i++ . PHP_EOL;
        flush();
        ob_flush();
        usleep(500000);
}

 

Live example: http://files.degeberg.com/flush.php

 

This works for me in Firefox 3.6.3, but not in Chrome 6.0.422.0 dev.

[Mchl]

On the other hand, if you run your code from the first post using command line, you will see output appearing as you were expecting it.

[soma56]

@Daniel0 Thank You:) You made my day. It worked flawlessly. Being new to PHP I really appreciate everyones insight.

 

Thanks Everyone.