WorkTheWeb Forums > [GD] Troubles

sa

Apr 22 2005, 03:35 PM

Hi all,

i'm not able to explain the behaviour of browsers internet explorer and
mozilla firefox with that script:

<table width="680" height="400" align="center" border=1><tr><td>
<table border="0">
<?
for($j=0;$j<30;$j++)
{
echo "<tr align="top">";
for($i=0;$i<60;$i++)
{
echo "<td><img src="gen_row.php?x2=0&y2=0&x1=0&y1=0"></img></td>";
}
echo "</tr>";
}
?>

gen_row.php file draw lines

$x2 = $_GET["x2"];
$y2 = $_GET["y2"];
$x1 = $_GET["x1"];
$y1 = $_GET["y1"];
header("Content-type: image/png");
$im = @imagecreate(10, 10)
or die("Cannot Initialize new GD image stream");
$background = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);
imageline($im, $x2, $y2, $x1, $y1, $black);
imagepng($im);
imagedestroy($im);
?>

With internet explorer time to time it works, other time browser get mad and
neither find the file.
With firefox it seems to work but time to time it don't create all columns
and rows cause script terminate before the end.

Any help is apprecciated.

Salvatore

Oli Filth

Apr 22 2005, 03:42 PM

sa wrote:

QUOTE

Hi all,

i'm not able to explain the behaviour of browsers internet explorer and
mozilla firefox with that script:

<table width="680" height="400" align="center" border=1><tr><td
<table border="0"
<?
for($j=0;$j<30;$j++)
{
echo "<tr align="top">";
for($i=0;$i<60;$i++)
{
echo "<td><img src="gen_row.php?x2=0&y2=0&x1=0&y1=0"></img></td>";
}
echo "</tr>";
}
?

30 x 60 = 900. I dunno if this is the cause, but 900 simultaneous
requests on a server is quite a serious load. Not to mention the
rendering pressure this puts on the browser, and the fact that your HTML
will be over 55K!

What are you trying to achieve with this script?

--
Oli

Kimmo Laine

Apr 22 2005, 03:43 PM

"sa" <[Email Removed]> kirjoitti
viestiss:xJ9ae.79229$[Email Removed]...

QUOTE

Hi all,

i'm not able to explain the behaviour of browsers internet explorer and
mozilla firefox with that script:

<table width="680" height="400" align="center" border=1><tr><td
<table border="0"
<?
for($j=0;$j<30;$j++)
{
echo "<tr align="top">";
for($i=0;$i<60;$i++)
{
echo "<td><img src="gen_row.php?x2=0&y2=0&x1=0&y1=0"></img></td>";
}
echo "</tr>";
}
?

gen_row.php file draw lines

$x2 = $_GET["x2"];
$y2 = $_GET["y2"];
$x1 = $_GET["x1"];
$y1 = $_GET["y1"];
header("Content-type: image/png");
$im = @imagecreate(10, 10)
or die("Cannot Initialize new GD image stream");
$background = imagecolorallocate($im, 255, 255, 255);
$black = imagecolorallocate($im, 0, 0, 0);
imageline($im, $x2, $y2, $x1, $y1, $black);
imagepng($im);
imagedestroy($im);
?

With internet explorer time to time it works, other time browser get mad
and
neither find the file.
With firefox it seems to work but time to time it don't create all columns
and rows cause script terminate before the end.

Any help is apprecciated.

Don't know if this helps anything, but there's no closing tag </img> for
img.

--
"I am pro death penalty. That way people learn
their lesson for the next time." -- Britney Spears

[Email Removed]

sa

Apr 22 2005, 03:52 PM

QUOTE

30 x 60 = 900. I dunno if this is the cause, but 900 simultaneous
requests on a server is quite a serious load. Not to mention the
rendering pressure this puts on the browser, and the fact that your HTML
will be over 55K!

Ok, i must try reducing the numbers of rows/colums..lets try.

QUOTE

What are you trying to achieve with this script?

Its a graph...every td can contain, "-" "/" - "".

sa

Apr 22 2005, 03:52 PM

QUOTE

Don't know if this helps anything, but there's no closing tag </img> for
img.

I already tried closing </img> but its the same. I think could be something
what Oli Filth was saying..
i need to try.

Thank you all.

Oli Filth

Apr 22 2005, 03:53 PM

sa wrote:

QUOTE

30 x 60 = 900. I dunno if this is the cause, but 900 simultaneous
requests on a server is quite a serious load. Not to mention the
rendering pressure this puts on the browser, and the fact that your HTML
will be over 55K!

Ok, i must try reducing the numbers of rows/colums..lets try.

What are you trying to achieve with this script?

Its a graph...every td can contain, "-" "/" - "".

Can't you just generate the graph as a single image rather than 900
separate images?

--
Oli

sa

Apr 22 2005, 03:57 PM

QUOTE

Can't you just generate the graph as a single image rather than 900
separate images?

Thank you for the hint!
I'll try this way ->

Flav

Jun 12 2005, 07:00 AM

I am running a cms demo site, mainly though not limited to PHP-Nuke and
it's forks.

What I am trying to do, though not having much luck is have my demo
sites totally erased every 2 hours and have it rebuilt via a cronjob.

What it need to do is:
Delete the dir
recreate the dir and extract a gzip file
delete a mysql database
re-import a sql file and rebuild the database

I want to have this all automated via a cronjob.

If anyone could help me I would be greatly appreciated, and all credits
will be given and advertised on our site.

Paul
Nuke Choice
http://www.nuke-choice.com

Flav

Jun 12 2005, 07:04 AM

Flav wrote:

QUOTE

I am running a cms demo site, mainly though not limited to PHP-Nuke and
it's forks.

What I am trying to do, though not having much luck is have my demo
sites totally erased every 2 hours and have it rebuilt via a cronjob.

What it need to do is:
Delete the dir
recreate the dir and extract a gzip file
delete a mysql database
re-import a sql file and rebuild the database

I want to have this all automated via a cronjob.

If anyone could help me I would be greatly appreciated, and all credits
will be given and advertised on our site.

Paul
Nuke Choice
http://www.nuke-choice.com

Sorry, wrong spot.
Don't know what happened there