从PHP shell_exec启动时，Bash脚本具有不同的行为

Question

script.sh

cd ~/scripts
acname=$(cat acname.txt)
days=$(cat days.txt)
nbmessages=`ls -l message_*.txt | wc -l`
today=`date +%Y%m%d`
#
echo $acname >> ./log.txt
echo $days >> ./log.txt
echo $nbmessages >> ./log.txt
echo $today >> ./log.txt

if I run script.sh in a shell prompt, log.txt shows:

alex8
4
5
20140124

which is correct

If I run script.sh using shell_exec function in PHP, log.txt shows:

log.txt: 


0
20140124

Therefore getting the content of a file doesn't work, nor counting the files with a specific pattern (got 0 when it should be 5), while the date command still works. Any idea ? Many thanks in advance !

Answer 1

~/scripts goes to the scripts subdir of YOUR home dir. This may be a different place than the home dir of the web server process running php.

In general using full paths can help alleviate issues like this, but you will still have to contend with ensuring the web server process has the rights to the files in question.