Set environment variable from outside bash

I'm trying to set a bash environment variable using PHP (from command line) with no success.

$buff=array();
$buff[]="VARTESTKEY=VARTESTVALUE";
$buff[]="export VARTESTKEY";
file_put_contents('script.sh', implode("\n",$buff));
system('source script.sh');

I've even tried using a script to output the key value which gets evaled:

$buff=array();
$buff[]="echo VARTESTKEY=VARTESTVALUE";
file_put_contents('script.sh', implode("\n",$buff));
system('eval "$(bash script.sh)"');

But still nothing.

Any ideas? I don't mind using any开发者_如何学Go other tool (perl, python, c, etc.) as long as it can do its job by being called from the PHP system function.

---

Do you need this environment variables before running another bash script?

You can just use putenv("KEY=VAL");

Es:

<?php
putenv("ASD=LOL");
system("echo \$ASD");
?>

Edit:

<?php 
echo "VARTESTKEY=VARTESTVALUE";
?>

launch it as:

$ eval `php script.php` && echo $VARTESTKEY