1.2.1463. array_merge() And Variadic¶
Always check value in variadic before using it with array_merge() and array_merge_recursive().
Before PHP 7.4, array_merge() and array_merge_recursive() would complain when no argument was provided. As such, using the spread operator … on an empty array() would yield no argument, and an error.
<?php
$b = array_merge(...$x);
?>
1.2.1463.1. Suggestions¶
Add a check to the spread variable to ensure it is not empty
Append an empty array to to the spread variable to ensure it is not empty
1.2.1463.2. Specs¶
Short name |
Structures/ArrayMergeAndVariadic |
Rulesets |
|
Exakat since |
1.9.2 |
PHP Version |
With PHP 7.4 and older |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Precision |
Very high |
Features |
variadic |
Available in |