Answer by Benny for Call and run php script from shell script

The problem in your code is the line:

. "${CONFIG}${i}/test.php"  

Remove the .

Here is another example:

$ ls -l

-rwxrwxr-x 1 bg bg 67 Oct 20 09:42 index.php
-rwxrwxr-x 1 bg bg 68 Oct 20 09:43 test.sh

index.php

<?php
    shell_exec('echo Hello > /tmp/hello.txt');
?>

test.sh

#!/bin/bash
/usr/bin/php index.php