100KB image that takes up 2mb of memory uses up all 8mb of memory - help!

[comp.lang.php]

I have an image that's only 100K in size, and I am working with 8mb of
memory. If I do this:

[PHP]
print_r(ceil((i nt)ini_get('mem ory_limit') * 10 *
filesize(actual _path("$locatio nPath/$this->fileName")) / 1000000) .
'M'); // PRINTS OUT "2M" for 2mb
]/PHP]

The image itself requires far less than the maximum amount of memory
required.

However, the moment I do this:

[PHP]
$imagestring =
@file_get_conte nts(actual_path (realpath("$loc ationPath/" .
$this->{$section . '_name'})));
[/PHP]

It locks up and forces a download of "index.php" (which indicates to me
that the memory allotment of 8mb has been used up).

How in the world can a 100KB image that uses only 2mb of 8mb use up 8mb
of memory on file_get_conten ts() alone? I'm completely confused!

Thanx
Phil

[Andy Hassall]

On 25 Sep 2006 13:41:02 -0700, "comp.lang. php" <ph************ **@gmail.com>
wrote:

>I have an image that's only 100K in size, and I am working with 8mb of
memory. If I do this:

[PHP]
print_r(ceil(( int)ini_get('me mory_limit') * 10 *
filesize(actua l_path("$locati onPath/$this->fileName")) / 1000000) .
'M'); // PRINTS OUT "2M" for 2mb
]/PHP]

Maybe I'm having a dense moment, but what does this value even mean?
memory_limit times 10 times size of file then divided by a million?

Is the output actually "2M" ? If you have a 100,000 byte file, doesn't that
mean your memory_limit is set to "2" ? (presumably "2M", turning into "2" after
the cast to int).

>The image itself requires far less than the maximum amount of memory
required.

However, the moment I do this:

[PHP]
$imagestring =
@file_get_cont ents(actual_pat h(realpath("$lo cationPath/" .
$this->{$section . '_name'})));
[/PHP]

It locks up and forces a download of "index.php" (which indicates to me
that the memory allotment of 8mb has been used up).

That seems like a guess... what error messages do you get? If you can't see
them, change the content-type of the output back to text.

>How in the world can a 100KB image that uses only 2mb of 8mb use up 8mb
of memory on file_get_conten ts() alone? I'm completely confused!

Why would a 100KB image use 2MB? Where did 8MB come from? I'm also confused...

The usual pitfall is that a 100KB image can easily decompress to several
megabytes, and that GD uses even more memory than you might expect.

--
Andy Hassall :: an**@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool

[comp.lang.php]

Andy Hassall wrote:

On 25 Sep 2006 13:41:02 -0700, "comp.lang. php" <ph************ **@gmail.com>
wrote:

I have an image that's only 100K in size, and I am working with 8mb of
memory. If I do this:

[PHP]
print_r(ceil((i nt)ini_get('mem ory_limit') * 10 *
filesize(actual _path("$locatio nPath/$this->fileName")) / 1000000) .
'M'); // PRINTS OUT "2M" for 2mb
]/PHP]

Maybe I'm having a dense moment, but what does this value even mean?
memory_limit times 10 times size of file then divided by a million?

Is the output actually "2M" ? If you have a 100,000 byte file, doesn't that
mean your memory_limit is set to "2" ? (presumably "2M", turning into "2" after
the cast to int).

Ok I'll make it super simple because I have to explain it so that I
understand. I want to increase memory because "8M" is 8mb which for
some images is not enough memory to run imagecreatefrom jpeg, or
imagecreatefrom gif or imagecreatefrom png.. so I am going to increase it
from 8MB to something like "130mb" or "130M" if need be for very large
images. It works every time, even if it's an eventual bad idea.

However, this image is 87KB in size and if I use the same formula to
"increase memory", instead I "decrease memory instead"

The image itself requires far less than the maximum amount of memory
required.

However, the moment I do this:

[PHP]
$imagestring =
@file_get_conte nts(actual_path (realpath("$loc ationPath/" .
$this->{$section . '_name'})));
[/PHP]

It locks up and forces a download of "index.php" (which indicates to me
that the memory allotment of 8mb has been used up).

That seems like a guess... what error messages do you get? If you can't see
them, change the content-type of the output back to text.

I see no errors not even in the PHP error log, absolutely nothing is
logged. Tried changing content-type to text/plain, to no avail, still
force-downloads index.php

>

How in the world can a 100KB image that uses only 2mb of 8mb use up 8mb
of memory on file_get_conten ts() alone? I'm completely confused!

Why would a 100KB image use 2MB? Where did 8MB come from? I'm also confused...

Sorry but I have no idea whatsoever. Can someone else elaborate?

>
The usual pitfall is that a 100KB image can easily decompress to several
megabytes, and that GD uses even more memory than you might expect.

--
Andy Hassall :: an**@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool

[Simon Stewart]

Andy

What size is the image you are loading in megaPIXELS?
This is often the limiting factor in PHP GD processing, not the original
size in Kb or the final size in Kb.
When I ran into this I found that PHP stopped abruptly with an error
message.

-- Simon
"comp.lang. php" <ph************ **@gmail.comwro te in message
news:11******** *************@e 3g2000cwe.googl egroups.com...

>
Andy Hassall wrote:

>On 25 Sep 2006 13:41:02 -0700, "comp.lang. php"
<ph*********** ***@gmail.com>
wrote:

>I have an image that's only 100K in size, and I am working with 8mb of
memory. If I do this:

[PHP]
print_r(ceil(( int)ini_get('me mory_limit') * 10 *
filesize(actua l_path("$locati onPath/$this->fileName")) / 1000000) .
'M'); // PRINTS OUT "2M" for 2mb
]/PHP]

Maybe I'm having a dense moment, but what does this value even mean?
memory_limit times 10 times size of file then divided by a million?

Is the output actually "2M" ? If you have a 100,000 byte file, doesn't
that
mean your memory_limit is set to "2" ? (presumably "2M", turning into "2"
after
the cast to int).

Ok I'll make it super simple because I have to explain it so that I
understand. I want to increase memory because "8M" is 8mb which for
some images is not enough memory to run imagecreatefrom jpeg, or
imagecreatefrom gif or imagecreatefrom png.. so I am going to increase it
from 8MB to something like "130mb" or "130M" if need be for very large
images. It works every time, even if it's an eventual bad idea.

However, this image is 87KB in size and if I use the same formula to
"increase memory", instead I "decrease memory instead"

>The image itself requires far less than the maximum amount of memory
required.

However, the moment I do this:

[PHP]
$imagestring =
@file_get_cont ents(actual_pat h(realpath("$lo cationPath/" .
$this->{$section . '_name'})));
[/PHP]

It locks up and forces a download of "index.php" (which indicates to me
that the memory allotment of 8mb has been used up).

That seems like a guess... what error messages do you get? If you can't
see
them, change the content-type of the output back to text.

I see no errors not even in the PHP error log, absolutely nothing is
logged. Tried changing content-type to text/plain, to no avail, still
force-downloads index.php

>>

>How in the world can a 100KB image that uses only 2mb of 8mb use up 8mb
of memory on file_get_conten ts() alone? I'm completely confused!

Why would a 100KB image use 2MB? Where did 8MB come from? I'm also
confused...

Sorry but I have no idea whatsoever. Can someone else elaborate?

>>
The usual pitfall is that a 100KB image can easily decompress to several
megabytes, and that GD uses even more memory than you might expect.

--
Andy Hassall :: an**@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool

[comp.lang.php]

Simon Stewart wrote:

Andy

What size is the image you are loading in megaPIXELS?
This is often the limiting factor in PHP GD processing, not the original
size in Kb or the final size in Kb.
When I ran into this I found that PHP stopped abruptly with an error
message.

The GIF image is Size: 332 x 287 px = 95284 sq px which is less than
0.1 sq mpx

in other words, a tiny image

Phil

-- Simon
"comp.lang. php" <ph************ **@gmail.comwro te in message
news:11******** *************@e 3g2000cwe.googl egroups.com...

Andy Hassall wrote:

On 25 Sep 2006 13:41:02 -0700, "comp.lang. php"
<ph************ **@gmail.com>
wrote:

I have an image that's only 100K in size, and I am working with 8mb of
memory. If I do this:

[PHP]
print_r(ceil((i nt)ini_get('mem ory_limit') * 10 *
filesize(actual _path("$locatio nPath/$this->fileName")) / 1000000) .
'M'); // PRINTS OUT "2M" for 2mb
]/PHP]

Maybe I'm having a dense moment, but what does this value even mean?
memory_limit times 10 times size of file then divided by a million?

Is the output actually "2M" ? If you have a 100,000 byte file, doesn't
that
mean your memory_limit is set to "2" ? (presumably "2M", turning into "2"
after
the cast to int).

Ok I'll make it super simple because I have to explain it so that I
understand. I want to increase memory because "8M" is 8mb which for
some images is not enough memory to run imagecreatefrom jpeg, or
imagecreatefrom gif or imagecreatefrom png.. so I am going to increase it
from 8MB to something like "130mb" or "130M" if need be for very large
images. It works every time, even if it's an eventual bad idea.

However, this image is 87KB in size and if I use the same formula to
"increase memory", instead I "decrease memory instead"

The image itself requires far less than the maximum amount of memory
required.

However, the moment I do this:

[PHP]
$imagestring =
@file_get_conte nts(actual_path (realpath("$loc ationPath/" .
$this->{$section . '_name'})));
[/PHP]

It locks up and forces a download of "index.php" (which indicates to me
that the memory allotment of 8mb has been used up).

That seems like a guess... what error messages do you get? If you can't
see
them, change the content-type of the output back to text.

I see no errors not even in the PHP error log, absolutely nothing is
logged. Tried changing content-type to text/plain, to no avail, still
force-downloads index.php

>
How in the world can a 100KB image that uses only 2mb of 8mb use up 8mb
of memory on file_get_conten ts() alone? I'm completely confused!

Why would a 100KB image use 2MB? Where did 8MB come from? I'm also
confused...

Sorry but I have no idea whatsoever. Can someone else elaborate?

>
The usual pitfall is that a 100KB image can easily decompress to several
megabytes, and that GD uses even more memory than you might expect.

--
Andy Hassall :: an**@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool

[Simon Stewart]

Phil

yes that's far in pixels smaller than when I had problems
the 8Mb memory_limit you have for PHP is low. Hosting companies often
allocate 16 or 32Mb.
have you tried doing memory_get_usag e calls before the problem code? Could
the program or environment be short on memory anyway?

Simon.

"comp.lang. php" <ph************ **@gmail.comwro te in message
news:11******** *************@e 3g2000cwe.googl egroups.com...

>
Simon Stewart wrote:

>Andy

What size is the image you are loading in megaPIXELS?
This is often the limiting factor in PHP GD processing, not the original
size in Kb or the final size in Kb.
When I ran into this I found that PHP stopped abruptly with an error
message.

The GIF image is Size: 332 x 287 px = 95284 sq px which is less than
0.1 sq mpx

in other words, a tiny image

Phil

>-- Simon
"comp.lang.php " <ph************ **@gmail.comwro te in message
news:11******* **************@ e3g2000cwe.goog legroups.com...

>
Andy Hassall wrote:
On 25 Sep 2006 13:41:02 -0700, "comp.lang. php"
<ph*********** ***@gmail.com>
wrote:

I have an image that's only 100K in size, and I am working with 8mb
of
memory. If I do this:

[PHP]
print_r(ceil(( int)ini_get('me mory_limit') * 10 *
filesize(actua l_path("$locati onPath/$this->fileName")) / 1000000) .
'M'); // PRINTS OUT "2M" for 2mb
]/PHP]

Maybe I'm having a dense moment, but what does this value even mean?
memory_limit times 10 times size of file then divided by a million?

Is the output actually "2M" ? If you have a 100,000 byte file,
doesn't
that
mean your memory_limit is set to "2" ? (presumably "2M", turning into
"2"
after
the cast to int).
Ok I'll make it super simple because I have to explain it so that I
understand. I want to increase memory because "8M" is 8mb which for
some images is not enough memory to run imagecreatefrom jpeg, or
imagecreatefrom gif or imagecreatefrom png.. so I am going to increase it
from 8MB to something like "130mb" or "130M" if need be for very large
images. It works every time, even if it's an eventual bad idea.

However, this image is 87KB in size and if I use the same formula to
"increase memory", instead I "decrease memory instead"

The image itself requires far less than the maximum amount of memory
required.

However, the moment I do this:

[PHP]
$imagestring =
@file_get_cont ents(actual_pat h(realpath("$lo cationPath/" .
$this->{$section . '_name'})));
[/PHP]

It locks up and forces a download of "index.php" (which indicates to
me
that the memory allotment of 8mb has been used up).

That seems like a guess... what error messages do you get? If you
can't
see
them, change the content-type of the output back to text.

I see no errors not even in the PHP error log, absolutely nothing is
logged. Tried changing content-type to text/plain, to no avail, still
force-downloads index.php
How in the world can a 100KB image that uses only 2mb of 8mb use up
8mb
of memory on file_get_conten ts() alone? I'm completely confused!

Why would a 100KB image use 2MB? Where did 8MB come from? I'm also
confused...

Sorry but I have no idea whatsoever. Can someone else elaborate?

The usual pitfall is that a 100KB image can easily decompress to
several
megabytes, and that GD uses even more memory than you might expect.

--
Andy Hassall :: an**@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis
tool

[comp.lang.php]

Simon Stewart wrote:

Phil

yes that's far in pixels smaller than when I had problems
the 8Mb memory_limit you have for PHP is low. Hosting companies often
allocate 16 or 32Mb.
have you tried doing memory_get_usag e calls before the problem code? Could
the program or environment be short on memory anyway?

I was suspecting that most places use more than 8mb default memory;
however, it appears customized as our servers here come "out of the
box" with RHEL 4 which sets the memory_limit within php.ini to 8mb.
It's easy to fix that, of course, but just thought I'd share.

I wrote some code that apparently seems to solve the memory issue:

[PHP]
$mem = memory_get_usag e();
list($width, $height) =
@getimagesize(a ctual_path(real path("$this->locationPath/$this->fileName"))) ;
if ($willIncreaseM emory && (int)ini_get('m emory_limit') * 10 *
@filesize(actua l_path("$this->locationPath/$this->fileName")) $mem) {
@ini_set('memor y_limit', ceil((int)ini_g et('memory_limi t') * 10 *
filesize(actual _path("$this->locationPath/$this->fileName")) / 100000)
.. 'M');
} elseif ($willIncreaseM emory && (int)$width 0 && (int)$height >
0) {
@ini_set('memor y_limit', ceil((int)$widt h * (int)$height * 5 /
10000) . 'M');
}
[/PHP]

Simon.

"comp.lang. php" <ph************ **@gmail.comwro te in message
news:11******** *************@e 3g2000cwe.googl egroups.com...

Simon Stewart wrote:

Andy

What size is the image you are loading in megaPIXELS?
This is often the limiting factor in PHP GD processing, not the original
size in Kb or the final size in Kb.
When I ran into this I found that PHP stopped abruptly with an error
message.

The GIF image is Size: 332 x 287 px = 95284 sq px which is less than
0.1 sq mpx

in other words, a tiny image

Phil

-- Simon
"comp.lang. php" <ph************ **@gmail.comwro te in message
news:11******** *************@e 3g2000cwe.googl egroups.com...

Andy Hassall wrote:
On 25 Sep 2006 13:41:02 -0700, "comp.lang. php"
<ph************ **@gmail.com>
wrote:

I have an image that's only 100K in size, and I am working with 8mb
of
memory. If I do this:

[PHP]
print_r(ceil((i nt)ini_get('mem ory_limit') * 10 *
filesize(actual _path("$locatio nPath/$this->fileName")) / 1000000) .
'M'); // PRINTS OUT "2M" for 2mb
]/PHP]

Maybe I'm having a dense moment, but what does this value even mean?
memory_limit times 10 times size of file then divided by a million?

Is the output actually "2M" ? If you have a 100,000 byte file,
doesn't
that
mean your memory_limit is set to "2" ? (presumably "2M", turning into
"2"
after
the cast to int).


Ok I'll make it super simple because I have to explain it so that I
understand. I want to increase memory because "8M" is 8mb which for
some images is not enough memory to run imagecreatefrom jpeg, or
imagecreatefrom gif or imagecreatefrom png.. so I am going to increase it
from 8MB to something like "130mb" or "130M" if need be for very large
images. It works every time, even if it's an eventual bad idea.

However, this image is 87KB in size and if I use the same formula to
"increase memory", instead I "decrease memory instead"

The image itself requires far less than the maximum amount of memory
required.

However, the moment I do this:

[PHP]
$imagestring =
@file_get_conte nts(actual_path (realpath("$loc ationPath/" .
$this->{$section . '_name'})));
[/PHP]

It locks up and forces a download of "index.php" (which indicates to
me
that the memory allotment of 8mb has been used up).

That seems like a guess... what error messages do you get? If you
can't
see
them, change the content-type of the output back to text.

I see no errors not even in the PHP error log, absolutely nothing is
logged. Tried changing content-type to text/plain, to no avail, still
force-downloads index.php


How in the world can a 100KB image that uses only 2mb of 8mb use up
8mb
of memory on file_get_conten ts() alone? I'm completely confused!

Why would a 100KB image use 2MB? Where did 8MB come from? I'm also
confused...

Sorry but I have no idea whatsoever. Can someone else elaborate?

The usual pitfall is that a 100KB image can easily decompress to
several
megabytes, and that GD uses even more memory than you might expect.

--
Andy Hassall :: an**@andyh.co.u k :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis
tool