E_WARNING for invalid container read array-access

<slide>
<title>E_WARNING for invalid container read array-access</title>

E_WARNING for invalid container read array-access — David Walker
https://wiki.php.net/rfc/notice-for-non-valid-array-container — https://github.com/php/php-src/pull/4386

<example result="0">
&lt;?php
xdebug_disable(); error_reporting(-1);

$var = false;
$var[1][2][3][4][5];

$var = array(123);
$var[0][1];
 
$a = [null];
$c = null;
$b = ($a[0][0] + $c[0]);
</example>

<div effect="fade-in">
<example class="error">
Notice:  Trying to access array offset on value of type bool in example.php on line 6
Notice:  Trying to access array offset on value of type null in example.php on line 6
Notice:  Trying to access array offset on value of type null in example.php on line 6
Notice:  Trying to access array offset on value of type null in example.php on line 6
Notice:  Trying to access array offset on value of type null in example.php on line 6

Notice:  Trying to access array offset on value of type int in example.php on line 9

Notice:  Trying to access array offset on value of type null in example.php on line 13
Notice:  Trying to access array offset on value of type null in example.php on line 13
</example>
</div>

</slide>