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Home/ Questions/Q 9129135
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Editorial Team
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Editorial Team
Asked: June 17, 20262026-06-17T07:40:37+00:00 2026-06-17T07:40:37+00:00

The following error i have received is Warning: array_key_exists() expects parameter 2 to be

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The following error i have received is

Warning: array_key_exists() expects parameter 2 to be array, 
null given in /home/*****/public_html/class/alerts.php on line 14

On line 14 in class/alerts.php i see the following line

if(!array_key_exists('flash_messages', $_SESSION)) $_SESSION['flash_messages'] = array();

I’m using the problem is inside $_SESSION but i’m not sure

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  1. Editorial Team
    Editorial Team
    2026-06-17T07:40:38+00:00Added an answer on June 17, 2026 at 7:40 am

    This error is suggesting that $_SESSION is null. This could be caused by not calling session_start() or perhaps the browser not accepting cookies.

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