imagecreatefromjpeg, calling a .php file

[Areric]

Ok all. I have a series of images stored in a db. Im trying to work on
a script that will let me scale them based on user input. Ive hit a bit
of a roadblock on this line.

$orig =
imagecreatefrom jpeg("DisplayIm age.php?imageId =".$this->mImage->GetImageId() );

Specifically it cant sopen that file.

DisplayImage.ph p is pretty simple, it just displays an image from the
db without writing to a file.

Im thinking the problem is in how im pathing to DisplayImage.ph p.

This file sits one level lower than most things so it should be
.../displayImage, but i tried that and no luck.

Any ideas whats wrong with that line?

[Erwin Moller]

Re: imagecreatefrom jpeg, calling a .php file

Areric wrote:
[color=blue]
> Ok all. I have a series of images stored in a db. Im trying to work on
> a script that will let me scale them based on user input. Ive hit a bit
> of a roadblock on this line.
>
> $orig =
>[/color]
imagecreatefrom jpeg("DisplayIm age.php?imageId =".$this->mImage->GetImageId() );[color=blue]
>
> Specifically it cant sopen that file.
>
> DisplayImage.ph p is pretty simple, it just displays an image from the
> db without writing to a file.
>
> Im thinking the problem is in how im pathing to DisplayImage.ph p.
>
> This file sits one level lower than most things so it should be
> ../displayImage, but i tried that and no luck.
>
> Any ideas whats wrong with that line?[/color]

There is nothing wrong with that line except that it is NOT the path to your
image.

You are confusing:
- the path to your image (nonexistent)
- with a php-script delivering the image.

Here is the difference: The is no such thing as the path to your image. Only
a URI (http) that points to your image.
The difference is that in the URI situation you invoke a script that
produces the image, while imagecreatefrom jpeg WANTS A PATH, as can be read
in the documentation at www.php.net.
NOT a URI, unless:

from http://nl2.php.net/manual/en/functio...tefromjpeg.php
--------------
Tip: You can use a URL as a filename with this function if the fopen
wrappers have been enabled. See fopen() for more details on how to specify
the filename and Appendix M for a list of supported URL protocols.
-----------------

So check that. :-)

And also remember that ../bla.php is NOT a good URI, it is just a part.
If you use URI, make sure they are full/well formed, like:

http://bla.bla.com/myImagescript.php?id=324

If you cannot make it work with fopenwrappers, just safe them from your
script in a directory, named after their ID's or something like that.

Regards,
Erwin Moler

[Areric]

Re: imagecreatefrom jpeg, calling a .php file

Hey thanks Erwin. I actually checked the box and that config option was
already enabled so all i had to do was give it a fully qualified url.

[Chung Leong]

Re: imagecreatefrom jpeg, calling a .php file


Areric wrote:[color=blue]
> Ok all. I have a series of images stored in a db. Im trying to work on
> a script that will let me scale them based on user input. Ive hit a bit
> of a roadblock on this line.
>
> $orig =
> imagecreatefrom jpeg("DisplayIm age.php?imageId =".$this->mImage->GetImageId() );
>
> Specifically it cant sopen that file.
>
> DisplayImage.ph p is pretty simple, it just displays an image from the
> db without writing to a file.
>
> Im thinking the problem is in how im pathing to DisplayImage.ph p.
>
> This file sits one level lower than most things so it should be
> ../displayImage, but i tried that and no luck.
>
> Any ideas whats wrong with that line?[/color]

Why don't you just read from the database directly and use
imagecreatefrom string()?

[Areric]

Re: imagecreatefrom jpeg, calling a .php file

Chung,

Im trying to break up as much as possible. This particular library I
really dont want to be dependant on any specific database
implementation. Im trying to abstract that out so i can reuse this
stuff independanly.

My DisplayImage.ph p script is dependant on the DB but not my
imagemanipulati on script.

Good idea though, im wondering if instead of returning an image object
i could just return the string itself.

[Chung Leong]

Re: imagecreatefrom jpeg, calling a .php file


Areric wrote:[color=blue]
> Chung,
>
> Im trying to break up as much as possible. This particular library I
> really dont want to be dependant on any specific database
> implementation. Im trying to abstract that out so i can reuse this
> stuff independanly.
>
> My DisplayImage.ph p script is dependant on the DB but not my
> imagemanipulati on script.
>
> Good idea though, im wondering if instead of returning an image object
> i could just return the string itself.[/color]

In that case a slicker approach is to define a stream wrapper that
reads from the database. See
http://fi.php.net/stream-wrapper-register/.