1.2.471. Foreach Needs Reference Array¶
When using foreach with a reference as value, the source must be a referenced array, which is a variable (or array or property or static property).
When the array is the result of an expression, the array is not kept in memory after the foreach loop, and any change made with & are lost.
This will do nothing This will have an actual effect
<?php
foreach(array(1,2,3) as &$value) {
$value *= 2;
}
?>
1.2.471.1. Suggestions¶
Use a referenced array when applying modifications inside a foreach loop
1.2.471.2. Specs¶
Short name |
Structures/ForeachNeedReferencedSource |
Rulesets |
|
Exakat since |
0.8.4 |
PHP Version |
All |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Precision |
Very high |
Features |
foreach, reference |
Available in |