Why does my code crashes WordPress?

WP: 5.0.2
PHP: recently updated 5.6 > 7.2

My code suddenly creates problems. When I save the page wordpress crashes und I get a text only page with zero style elements – like you open a text page in your browser.

One the frontend the page renders – but the side panel is missing.

I found the backend troublemaker, but I wonder why.

Bad code:

<?php
if(isset($_POST['imodel'])){ $mod = $_POST['imodel']; } ELSE {$mod = 'iPhone Xs'; $linkinsert ='iphone-xs';}
if(isset($_POST['imemory'])){ $mem = $_POST['imemory']; } ELSE {$mem = '64';}

if(isset($_POST['curr_option'])){$curr_option = $_POST['curr_option']; } ELSE {$curr_option = 'USD';}

Changed and working in backend:

<?php
if(!empty($_POST['imodel']) || !empty($_POST['imemory'])){
    $mod = 'iPhone Xs'; $linkinsert ='iphone-xs'; $mem = '64';
}

if(isset($_POST['curr_option'])){$curr_option = $_POST['curr_option']; } ELSE {$curr_option = 'USD';}

However, in the frontend the side-panel still disappears on reload.

Need to add that the bad code did run in PHP 5.6 (or previous WP version) without problem.

• This topic was modified 6 years, 1 month ago by yellofish.

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