1.2.1418. Variable Parameter Ambiguity In Arrow Function¶
Avoid using a parameter that is also the name of a local variable.
Arrow functions import automatically the variables from the local context in their body. Yet, a variable name may also be used as the name of a parameter. In that case, PHP use the parameter, and omits the value of the local variable.
<?php
// $b is a parameter, $a is a local variable
$a = 1;
fn($b) => $a + $b;
// $a is a local variable, but also a parameter.
// PHP uses the parameter, and omits the local variable
fn($a) => $a + 1;
?>
1.2.1418.1. Suggestions¶
Use parameter names that are distinct from the local variables names.
1.2.1418.2. Specs¶
Short name |
Functions/VariableParameterAmbiguityInArrowFunction |
Rulesets |
|
Exakat since |
2.6.6 |
PHP Version |
All |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Precision |
Very high |
Features |
arrow-function |
Available in |