php exec not working via browser

Asked Aug 01 '16 at 20:50

Active Aug 01 '16 at 21:17

Viewed 4,800 times

Server : Ubantu 16 Php version : 7

i have php 7 installed on ubantu 16 .i have also installed imagemagick.

now my php file say index.php with code below

echo exec("whoami");
echo exec("/usr/bin/convert '/var/www/html/slc.png' '/var/www/html/slc.ppm'");

now when i run it in browser say example.com/index.php , it show output

www-data

But convert command does not gets executed.

but when i run it via cli new ppm file is created

php index.php

can you please tell me how to fix this issue

edited Aug 01 '16 at 21:17

asked Aug 01 '16 at 20:50

pcoder

2

Permissions issue, almost certainly. Turn error reporting on or check the server logs. – ceejayoz Aug 01 '16 at 20:53
i have added ini_set('display_errors',1);error_reporting(E_ALL); no error – pcoder Aug 01 '16 at 20:55
Is that all that you have in your script? If not, make a stripped down copy that serves only at demonstrating the issue and show it completely here. – Julie Pelletier Aug 01 '16 at 21:06
yeah it has just one line code to convert png to ppm , strange it works via php cli – pcoder Aug 01 '16 at 21:08
For your EGO's sake, do not use the word `strange` (or its derivatives) as it will only make you look bad. – Julie Pelletier Aug 01 '16 at 21:37
If you just put ` – Julie Pelletier Aug 01 '16 at 21:38
hey solved issue , created test folder with 777 permission and changed my code echo exec("/usr/bin/convert '/var/www/html/slc.png' '/var/www/html/test/slc.ppm'"); – pcoder Aug 01 '16 at 21:45
1

OMG NO - please learn how permissions work, how code injection occurs and implement a minimal set of permissions. – symcbean Aug 02 '16 at 07:58
hey bro can you tell what i should do – pcoder Aug 02 '16 at 18:11

0 Answers0