PHP Handling error from a returned array

Question

at the moment I do something like this

exec($command, $retval);

The response is normally an array, which has either the value success or failure. At the moment, I am doing something like the following

if($retval[0] === 'success') {
    //do something else
} else {
   //handle the error
}

I have noticed though that sometimes, I see an error in the console which states

Undefined offset: 0 in

I presume that sometimes something is happening and an array is not returned. It is executing a Python script.

Is there any way I can handle if the offset is 0? I would have presumed this would have been handled in the else clause, but apparently not.

Thanks

if(isset($retval[0]) && $retval[0] === 'success') { do what ever you want } — Basheer Kharoti
– Basheer Kharoti, Commented Nov 20, 2015 at 13:44

swidmann · Accepted Answer · 2015-11-20 13:51:51Z

2

You could handle the case using an isset() like so, as @Basheer Ahmed also pointed out above in a comment :

if( isset( $retval[0] ) && $retval[0] === 'success' ) {
    //do something else
} else {
   //handle the error
}

swidmann

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answered Nov 20, 2015 at 13:46

Calimero

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