% of script run?

cbrknight

I have a script that takes a while to run. Is there a way to create something that will tell what percent of the script has run... kind of like the way a flash preloader tells how much of a movie has loaded?

I was thinking about counting the iterations of the loop

$num_records = 50;
$cnt = 0;
while ($i <=$num_records){
$percent = (($i / 100)*100 );
$i++
}
echo("$percent% <br>");

There are two problems with this.

I need it to round to the nearest 10th's place... ie 1% - 100%
I need to have the output only change the number not repeatedly print out:

1%
2%
3% etc..

will this work? can someone tell me where i am going wrong with my logic?

bodzan

...and from what I know it is interpreted first and only then shown...

What you need is a way to stop compiling the script and then to show the value that is current but I don't think you can do that with PHP...

It's simply not built that way... The way it's built will show the final value of the variable...

Weedpacket

One sneaky method relies on Javascript being turned on on the client.

Before getting to the slow patch...
Write enough of the page to have somewhere to put the percentage count.
Have <div id="progress">0%</div> somewhere in that page (this will be your progress display, funnily enough).
Temporarily insert an exit; immediately before the slow patch, and check that the progress display is properly rendered. In particular, make sure the <div> tag is there.
Remove the exit;
To update the percentage display, echo a bit of Javascript.
```
<script>document.getElementById['progress'].innerHTML=<?php echo $percent?>%</script>
```
Every time the client receives one of those it should rewrite the HTML content of that <div> tag. If there's enough of a gap between successive lines of script, the previous content should sit around long enough for the user to see, before it gets updated.

sfullman

<div id="status">starting..</div>

for($i=1;$i<=100;$i++){
    sleep(5);
    ?><script>
document.getElementById('status').innerHTML="<?php echo $i . '%'?>";
    </script><?php
}

work with that, also your percentage calc should look like this (excuse the extra code which doesn't pertain):

if(($x=floor( ( $_i_ / $rows )*100)) > $percent){
	$percent=$x;
	//get estimated time remaining
	if(time()>$startTime && $readStatus>0){
		$delta=time()-$startTime;
		$timeRemaining = round(($delta * (100-$readStatus)) / $readStatus);
		$estTimeRemaining = time_english($timeRemaining) . " remaining";
	}
	//update status on page - you could write the javascript here
	echo "<script>u($readStatus, '$estTimeRemaining');</script>";
	//write update to .readstatus file
	$fp[readstatus]=fopen($file.'.readstatus','w');
	fwrite($fp[readstatus],"$readStatus percent of $rows running $startTime to ".time());
	fclose($fp[readstatus]);

	//update .status file also
	$statusFileString=implode('',file($file.'.status'));
	if(!preg_match('/<inprocess[^>]+>/i',$statusFileString,$sfs)){
		//the status file should be present at this point
		exit('Status file not present at time of start row processing, line '.__LINE__);
	}
	$currentInprocess=$sfs[0];
	$newInprocess=xml_modify_tags($currentInprocess,'status',STAT_INPROCESS);
	$newInprocess=xml_modify_tags($newInprocess,'posttime',time());
	$newInprocess=xml_modify_tags($newInprocess,'currentrow',$i);
	$statusFileString = str_replace($currentInprocess,$newInprocess,$statusFileString);
	//write again
	$fp[status]=fopen($file.'.status','w');
	fwrite($fp[status],$statusFileString,strlen($statusFileString));
	fclose($fp[status]);
}

sfullman

one thing if found out, weed, is that you must enclose each new write to the innerHTML is a separate pair of <script></script> containers. IE at least only interprets the line after the </script> comes trhough.

Sam

jpr

But dont we still have the problem of waiting for the server to finish before anyhing is output to the client? Is there a way to flush the output to the client on command?

<html>
<body>
<div id="status">starting..</div>
<?php
for($i=1;$i<=100;$i++){
	sleep(1);
	?>

<script>
  document.getElementById('status').innerHTML="<?php echo $i . '%'?>";
</script>
<?php
}
?>
</body>
</html>

Weedpacket

You mean something like [man]flush[/man]?🙂

sfullman

I never needed to use flush(), it just works. the server starts putting out code for me immediately.

However, if your code is inside a table, the BROWSER waits for the </table> tag before it renders anything, and I've had cases like what you describe jpr. I'm on a LAMP system.

Sam

cbrknight

I have been trying for a week now to get this working. can someone look at the attached code and see what I am doing wrong? Also if it cant be done with this code please let me know.

Thanks...

cbrknight

anyone have a clue about making this work? If it is impossible please feel free to say so. I would rather know than keep monkeying around with it..

jpr

I have it working. Just followed the code exactly.

cbrknight

JPR did you get it working with my code?

I followed the code you listed and it didnt work with my code.

Weedpacket

You realise that jpr's code doesn't actually do anything except serve as an illustration of the process? The sleep() statement should be replaced by whatever code you're wanting to carry out inside the loop. Also, jpr showed a complete working example, which requires an entire HTML document from <html> to </html>; something that has to be taken into account if this code is to appear within something larger, with the HTML being supplied by something else (as I assume from the absence of such tags in any of the other cases).

cbrknight

Ok... i figured out what part of my problem was... This code doesn't work in Firefox... works fine in IE... which is fine. that is what it will be run in...

I have another question now. I want the loop to continue running until the script has completed... but this code

for ($i=1; $i<=100; $i++) stops at 100 iterations. I even tried 20000 and it still wasnt enough...

how do I get it to run for as long as the code is running... ie... code reaches EOF?