See the following link:
http://www.daniweb.com/forums/thread116143.html

And here’s my solution (I uninstalled IM and reinstalled it into my home directory, that’s why the paths are different from what I listed before. But this has nothing to do with what the problem was. I also changed the user from www to www2 - I added the www2 user and made a change in the httpd.conf file - but again this was part of troubleshooting and had nothing to do with the problem):

Code:
putenv(”MAGICK_HOME=” .$_ENV["MAGICK_HOME"]. “/Users/shafique/ImageMagick-6.4.5/”);
exec(’echo $MAGICK_HOME’,$array);
putenv(”PATH=” .$_ENV["PATH"]. “/Users/shafique/ImageMagick-6.4.5/bin”);
exec(’echo $PATH’,$array);
putenv(”DYLD_LIBRARY_PATH=” .$_ENV["DYLD_LIBRARY_PATH"]. “/Users/shafique/ImageMagick-6.4.5/lib”);
exec(’echo $DYLD_LIBRARY_PATH’,$array);
echo “”.print_r($array).”";
exec(’/Users/shafique/ImageMagick-6.4.5/bin/convert /Users/www2/IMG_0041.JPG /Users/www2/41.png 2>&1′, $array);

So the problem was that my environment variables would not stay set they way that I had set them after installing IM; I have to set them each time I run the php code, as above. Note that simply using:

Code:
exec( ‘export $DYLD_LIBRARY_PATH=”/Users/shafique/ImageMagick-6.4.5/lib” ‘,$array);

(as per the IM installation instructions) will NOT work; the environment variable will NOT stay set this way (at least on my Leopard 10.5 MacBook Pro). Note also it necessary that both the input and output files be in a directory that is accessible to all (I did chmod a+rw /Users/www2).

I hope this helps others!

Thanks for the suggestion about the access rights. The PHP user operates as “_www”. Changing permissions recursively on the IM directory to give all users rwx permissions, which I did, should have taken care of any permissions issues. I ran some tests using php script to see what kind of errors were being returned, and here’s what I came up with:

Here’s the testing code:

$array=array();
echo “”;
exec(”/Applications/ImageMagick-6.4.4/bin/convert IMG_0041.JPG 41.png 2>&1″, $array);
echo “”.print_r($array).”";
echo “”;

and here’s the error that the above script generated:

Array
(
[0] => dyld: Library not loaded: /ImageMagick-6.4.4/lib/libMagickCore.1.dylib
[1] => Referenced from: /Applications/ImageMagick-6.4.4/bin/convert
[2] => Reason: image not found
)

What’s odd is that running the following command from the command line in a terminal window:

/Applications/ImageMagick-6.4.4/bin/convert IMG_0041.JPG 41.png 2>&1

works just fine. I’m thinking to focus on the first error:

[0] => dyld: Library not loaded: /ImageMagick-6.4.4/lib/libMagickCore.1.dylib

It seems that as a terminal user the library loads, but as “_www” it does not. Since the permissions are fine, maybe the paths need to be changed for the “_www” Are path settings different for different users? Your thoughts?

First the path was wrong, and the system command gave me a return value of 127. Then I fixed the path to the convert command (/Applications/ImageMagick-6.4.4/bin/convert), and I fixed the paths to the input and output filenames. Here is the code I’m using:

<?php
$resizefile = “/Applications/ImageMagick-6.4.4/bin/convert /Users/shafiquejamal/outsideofwebdir/uploads/IMG_0041.JPG /Users/shafiquejamal/outsideofwebdir/uploads/41.png”;

echo $resizefile;
$last_line = system($resizefile , $retval);

// Printing additional info
echo ‘

Last line of the output: ‘ . $last_line . ‘
Return value: ‘ . $retval;
?>

The return value is 5, when I execute this; it does not convert the file. BUT When I copy and past the resize command exactly (without quotes) into the terminal window, it works just fine - it converts the file. It just doesn’t work from php (i.e. the php script executed from the brower does not do anything). I’m running MAC OS X Leopard 10.5.5 on a MacBook Pro (Intel), and using ImageMagick-6.4.4 I’ve changed permissions on the source and target folders using chmod a+rw {paths}, and checked that everyone can read and write to those directories.

I am still building my image magick functions to handle all kinds of image manipulation from standard resizing and cropping to creating polaroid effects. ImageMagick works great and has handled a 45Mb jpg file without a problem (except for the delay :-)). The only thing that gets me is that I don’t need to run it as a system command, locally or on the host. I also use passthrough so it doesn’t save new files and stuff.

Once I have the code I will try to remember to post it. It is fairly big as it handles a lot of error checking.

Great site, clean simple and straight to the point - you rock!

Cheers,
Jamie.

convert -thumbnail 100×100 img-from img-to

yep, one line.

Anywaz, keep up the good work!.