Executing shell command in php doesn't work

Question

I'm trying to execute a shell script to convert some images from .png to .tif using the command convert.

I have written a short shell script:

#! /bin/bash
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/1.png /Applications/MAMP/htdocs/test/1.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/2.png /Applications/MAMP/htdocs/test/2.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/3.png /Applications/MAMP/htdocs/test/3.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/4.png /Applications/MAMP/htdocs/test/4.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/5.png /Applications/MAMP/htdocs/test/5.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/6.png /Applications/MAMP/htdocs/test/6.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/7.png /Applications/MAMP/htdocs/test/7.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/8.png /Applications/MAMP/htdocs/test/8.tif
convert -adaptive-resize 150% /Applications/MAMP/htdocs/test/9.png /Applications/MAMP/htdocs/test/9.

If I run this script from the terminal it works as expected.

Instead if I launch this from whithin a php page it doesn't.

I'm using this code:

exec("bash /Applications/MAMP/htdocs/test/convertpngtif.sh");

How can I solve this?

When you launch it from within a php page, do you get any error messages? — TecBrat
– TecBrat, Commented Nov 12, 2013 at 11:07
The user PHP runs as probably doesn't have permissions to access that script. — vascowhite
– vascowhite, Commented Nov 12, 2013 at 11:07
Try this : shell_exec("bash/Applications/MAMP/htdocs/test/convertpngtif.sh"); — Rohit
– Rohit, Commented Nov 12, 2013 at 11:09
@vascowhite I'm sure that's the problem, how can I solve this? — Giorgio
– Giorgio, Commented Nov 12, 2013 at 11:11

vascowhite · Accepted Answer · 2013-11-12 11:29:27Z

1

This is a permissions problem. You need to allow the user that PHP runs as to have access to the sh file.

PHP usually runs as www-data, that being the case you can open a terminal and run something like:-

chown www-data:www-data /Applications/MAMP/htdocs/test/convertpngtif.sh

I don't know how your system is set up, so you may have to sudo that command.

You will have to make sure that www-data also has access to the files accessed by the bash script in a similar way, so just the following command may work:-

chown -R www-data:www-data /Applications/MAMP/htdocs/test/

edited Nov 12, 2013 at 11:29

answered Nov 12, 2013 at 11:15

vascowhite

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2 Comments

Giorgio Over a year ago

chown: www-data: Invalid argument

vascowhite Over a year ago

Ah, sorry I thought you were on Linux. Didn't spot the OSX tag, what a duffer! Can't help any further, sorry. Although it looks as if the syntax is the same ss64.com/osx/chown.html

Giorgio · Accepted Answer · 2013-11-12 14:05:21Z

0

Solution: use full path in the shell script.

answered Nov 12, 2013 at 14:05

Giorgio

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