1.2.826. No Max On Empty Array¶
Using max() or min() on an empty array leads to a valueError exception.
Until PHP 8, max() and min() returned null in case of empty array. This might be confusing with actual values, as an array can contain null. null has a specific behavior when comparing with other values, and should be avoided with max() and sorts.
Until PHP 8.0, a call on an empty array returns null <https://www.php.net/`null>`_, and a warning.
<?php
// Throws a value error
$a = max([]);
$array = [];
if (empty($array)) {
$a = null;
} else {
$a = max($array);
}
var_dump(min([-1, null])); // NULL
var_dump(max([-1, null])); // -1
var_dump(max([1, null])); // 1
?>
1.2.826.2. Connex PHP features¶
1.2.826.2.1. Suggestions¶
Check the content of the array before giving it to max() or min()
1.2.826.2.2. Specs¶
Short name |
Structures/NoMaxOnEmptyArray |
Rulesets |
|
Exakat since |
2.5.2 |
PHP Version |
With PHP 8.0 and more recent |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Changed Behavior |
PHP 8.0 |
Precision |
High |
Available in |