Trying to run command line jq from php

Question

I have been trying to run this PHP script. There is no output whatsoever and I cannot seem to understand the reason.

<?php

echo "Example DOI Query <be>";

$doi = someDOIvalue;

echo 'DOI: '.$doi.'<br>';

$query = 'curl -LH "Accept: application/json" http://doi.org/';

$cmd = $query.$doi." | jq '.title'";

echo $cmd;

$title = shell_exec($cmd);

echo 'Title:<br>'.$title;

?>

However, when I try to use the same command on my LINUX command line (as below), it works perfectly fine.

curl -LH "Accept: application/json" http://doi.org/10.1016/someDOIvalue | jq '.title'

Any idea what I'm doing wrong?

I would check your webserver logs, PHP probably doesn't have permission to run an exec or something like that. Is this CentOS? — Petro
– Petro, Commented Apr 9, 2022 at 15:30
Also try calling jq from its absolute path like /usr/bin/jq. — pmf
– pmf, Commented Apr 9, 2022 at 15:34
@Nigel thanks! It worked. Turns out I need to give full path names for both jq and curl — ohMMM
– ohMMM, Commented Apr 9, 2022 at 17:15

Ahmed Hassan · Accepted Answer · 2022-04-09 15:41:34Z

-2

there are a lot of reasons for this issue try to check

the group and the permission also use the full path of the command

I hope it's help full

answered Apr 9, 2022 at 15:41

Ahmed Hassan

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