ImageMagick: convert png fail via PHP and works via bash shell

Question

I've got a very weird bug which I've yet to find a solution. UPDATE see solution below

What I am trying to do is convert a full size picture into a 160x120 thumbnail. It works great with jpg and jpeg files of any size, but not with png.

ImageMagick command:

/opt/local/bin/convert '/WEBSERVER/images/img_0003-192-10.png' -thumbnail x320 -resize '320x<' -resize 50% -gravity center -crop 160x120+0+0 +repage -quality 91 '/WEBSERVER/thumbs/small_img_0003-192-10.png'

PHP function (shortened)

...
$cmd = "/opt/local/bin/convert '/WEBSERVER/images/img_0003-192-10.png' -thumbnail x320 -resize '320x<' -resize 50% -gravity center -crop 160x120+0+0 +repage -quality 91 '/WEBSERVER/thumbs/small_img_0003-192-10.png'";
exec($cmd, $output, $retval);
$errors += $retval;
if ($errors > 0) {
    die(print_r($output));
}

When this function runs $retval equal 1 which means the convert command failed (thumbnail isn't created).

This is where it gets interesting, if I run the exact same command in my shell, it works.

wedbook:~ wedix$ /opt/local/bin/convert '/WEBSERVER/images/img_0003-192-10.png' -thumbnail x320 -resize '320x<' -resize 50% -gravity center -crop 160x120+0+0 +repage -quality 91 '/WEBSERVER/thumbs/small_img_0003-192-10.png'
wedbook:~ wedix$

I've tried using different PHP function such as system, passthru but it didn't work. I thought maybe someone here knew the solution.

I'm using

MAMP 1.7.2
- Apache/2.0.59
- PHP/5.2.6

Thanks!

UPDATE

I updated the following dependencies

libpng from 1.2.35 to 1.2.37
libiconv from 1.12_2 to 1.13_0
ImageMagick 6.5.2-4_1 to 6.5.2-9_0

However, it did not fix my problem.

2nd UPDATE

I finally found something that might help, when the function runs this is what gets printed in the Apache logs:

dyld: Library not loaded: /opt/local/lib/libiconv.2.dylib
  Referenced from: /opt/local/bin/convert
  Reason: Incompatible library version: convert requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0

3rd UPDATE

libiconv.2.dylib is version 8.0.0...

bash-3.2$ otool -L /opt/local/lib/libiconv.2.dylib 
/opt/local/lib/libiconv.2.dylib:
    /opt/local/lib/libiconv.2.dylib (compatibility version 8.0.0, current version 8.0.0)
    /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.4)

4th UPDATE

Problem was related to MAMP, see solution below

Phil M. · Accepted Answer · 2009-06-20 09:11:11Z

7

Solved it!

It turns out the environement variable DYLD_LIBRARY_PATH wasn't set properly.

Mac OS X Leopard comes with libiconv 7.0.0 but convert requires 8.0.0 (see 2nd UPDATE above)

bash-3.2$ otool -L /usr/lib/libiconv.2.dylib 
/usr/lib/libiconv.2.dylib:
    /usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0)
    /usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.1)

ImageMagick and all dependencies was installed with MacPorts under /opt/local. This requires to manually add the path /opt/local/lib to DYLD_LIBRARY_PATH.

If I add the path /opt/local/lib to DYLD_LIBRARY_PATH in the Mac OS X Leopard apachectl envvars file /usr/sbin/envvars it doesn't work. Why? It's because I don't use apache from Mac OS X Leopard, I use MAMP.

MAMP has its own apachectl script and it's own envvars file.

I added the path /opt/local/lib to DYLD_LIBRARY_PATH in the MAMP apachectl envvars file /Applications/MAMP/Library/bin/envvars

DYLD_LIBRARY_PATH="/opt/local/lib:/Applications/MAMP/Library/lib:$DYLD_LIBRARY_PATH"

Now my PNG thumbnails are being generated and no errors are generated in the apache error log!

I hope this will help someone and next time I'll remember to check every logs files before asking for help!

Phil

answered Jun 20, 2009 at 9:11

Phil M.

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5 Comments

defines Over a year ago

Was going to suggest this was a Leopard-specific issue after reading about the COMMAND_MODE issue. Nice work :)

mga Over a year ago

man this is not working for me and I am pulling my hair here... any other instruction not mentioned here you might have done?

mga Over a year ago

hi... I could make a "hello world" like exec("convert logo: logo.gif") and it works fine... however, a more complex convert will work in shell but not in exec():

/opt/local/bin/convert -size 758x185 /Applications/MAMP/htdocs/recetas/img/photo/old.tmp -crop 470x185+142+0!   -quality 100 +profile "*" /Applications/MAMP/htdocs/recetas/img/photo/new.jpg

... I am creating logo.gif in the same dir as old.tmp so it is not a matter of paths (besides, the thing works if I copy/paste the command in bash or sh. The error in apache (no php errors) is sh: command_here: No such file or directory

mga Over a year ago

for the record: seems the escapeshellarg() function does something with the paths causing ImageMagick not to work. I had never used that before but saw it as a recommendation in php.net so went ahead with that and have just wasted threee whole days debugging this freaking thing... oh well

slik Over a year ago

Hey you rock! This helped me out. I installed imagick using homebrew and with the new version of OSX (Lion), X11 is already installed. I had a problem where i included /usr/local/lib but I still could not use png format. So I had to include /usr/X11/lib. Now it works!

Rob · Accepted Answer · 2010-01-09 02:35:43Z

5

My path was /opt/local/bin, but even adding that to DYLD_LIBRARY_PATH didn't work. Finally when I changed just plain ole PATH, it worked via PHP.

;Did not work...

;DYLD_LIBRARY_PATH="/opt/local/bin:/Applications/MAMP/Library/lib:$DYLD_LIBRARY_PATH"

;export DYLD_LIBRARY_PATH

; This works!

export PATH="$PATH:/opt/local/bin"

answered Jan 9, 2010 at 2:35

Rob

2 Comments

Stiropor Over a year ago

Thank you, thank you, thank you! This helped me solve the problem :)

Matt Stein Over a year ago

Thanks! I know that these "thank you" comments are discouraged, but this ended a long, confusing battle for me.

jjclarkson · Accepted Answer · 2015-07-07 17:21:16Z

1

Make sure the user running the php code has the same permissions on the files and directories.

edited Jul 7, 2015 at 17:21

answered Jun 19, 2009 at 19:57

jjclarkson

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1 Comment

Phil M. Over a year ago

Yes, both images and thumbs folder are also world-writable.

tylerl · Accepted Answer · 2009-06-20 08:55:00Z

0

These should be obvious, but make sure you check things like PHP safe mode, open_basedir, and whether exec has been disabled.

answered Jun 20, 2009 at 8:55

tylerl

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1 Comment

Phil M. Over a year ago

They aren't disable, I was able to generate thumbnails from JPG and JPEG files but not from PNG files. See solution below

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