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skiflyer

skiflyer

Programmer
Sep 24, 2002
2,213
US
Ok, this is most likely a javascript question, but in the interest of not cross-posting, and also going to the place most likely to provide a solution...

I have a page which takes some time to load. It's taking the time because of a rather annoying shell_exec call... I want to say, Be patient, page is coming.

I figured a javascript popup of some sort would be best, but printing it to the page is just as fine by me.

Is there a good way to do this in either PHP or Javascript?

Echo/print is inneffective here.

-Rob
 
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If you are like me and handier with a GIF animation than JavaScript, create a GIF animation that says 'One moment please...'. You can animate a progress bar. The last frame of the animation should be blank so by the time the page loads, the animated GIF seems to be gone.
 
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This would imply I knew how long the page took to load, and that's exactly my problem, between a myriad of factors the page takes between 1 second and 20.

-Rob
 
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in the interest of good web design - a warning should be displayed for the user before the shell_exec call. if it is the first page on the site, then it should be simple to write a bit of html that tells the user to be patient, if it is not the default page, a note by the link the that the user clicks that activates the shell_exec would be good.

why is echo/print innefective? curious...

 
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Print/echo is ineffective because the output was being delayed until after the shell_exec finished anyway.

The page has frames, so the solution I went with was, before leaving for the page which calls shell_exec I make one frame a please wait message, then when the shell_exec page finishes it returns the frame to normal.

And sleipnir, this is back with my questionable shell_exec call, I doubt anyone would complain that it loaded at 20%, but that it stuck on 99% over and over would be problematic.

-Rob
 
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echo 300 spaces and your buffers will clear. --BB
 
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I have a program that generates PDF's, the process can take upto 30 minutes. I use this code:

function PDFGen($Creator = "", $Author = "", $Title = "", $FileName = "") {
global $isDone, $PDFs;
$this->_Obj = pdf_new();
if ($FileName == "") {
if (!pdf_open_file($this->_Obj, "")) {
die("Error creating PDF");
}
} else {
if (!pdf_open_file($this->_Obj, realpath("./cache/".$FileName))) {
die("Error creating PDF");
}
echo &quot;<HTML><BODY>Creating report, please wait...</BODY></HTML>&quot;;
echo str_repeat(&quot; &quot;, 300);
flush();
}
ob_start();
...SNIP...
}

function ShowPDF($force = false) {
$this->ClosePage();
pdf_close($this->_Obj);
$PDFs = &quot;&quot;;
$errs = ob_get_contents();
ob_end_clean();
if (!$this->_Debug) {
if (strlen(trim($errs)) > 0 && !$force) {
echo &quot;There has been an unexpected error<br>&quot;;
echo &quot;<hr>&quot;.$errs;
} elseif ($this->_FileName == &quot;&quot;) {
$buf = pdf_get_buffer($this->_Obj);
header(&quot;Content-Type: application/pdf&quot;);
header(&quot;Content-Length: &quot;.strlen($buf));
header(&quot;Content-Disposition: inline; filename=PDF.PDF&quot;);
echo $buf;
} else {
echo &quot;<script>location.href = './cache/&quot;.$this->_FileName.&quot;';</script>&quot;;
}
}
}
--BB
 
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Just a note from your first post, a Javascript popup would probably be a bad idea because processing is stopped until they click OK, and then they're left looking at a blank screen still.
 
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BB101,

Intriguing... for my own edification is 300 a scientifically determined number or was it done by trial and error?

-Rob

 
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300 was a number recommended to me by somewhere else when I was experiencing the same problem as mentioned above! --BB
 
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