Return value of the 'return_var' if exec function is successful in PHP?
<p>I need some basic information regarding the return values when the <code>exec()</code> function is successfully executed. Especially what should be the value of the 'return_var' when <code>exec</code> is successful and at the same time what would be in the output array as well and vice-versa.</p>

<p>In my case I am getting a value of <code>return_var = -6</code>.</p>

<p>Does it have any proper meaning?</p>

<p>Thanks</p>
