Code Inspection: 'foreach' variable overwrites already defined variable
Reports the keys and values in foreach
loops that are assigned a non-primitive value before the foreach
loop and are accessed after it. Such usages may unwillingly overwrite an already defined value and cause latent bugs.
In the following example, the $value
variable is initially assigned the result of calling foo()
. When iterating over the myArr
array, the value of the current element is assigned to and overwrites $value
on each iteration. To avoid potential bugs, a new $val
variable is used inside the foreach
loop.
$value = foo();
foreach ($myArr as $key => $value) {}
echo $value;
$value = foo();
foreach ($myArr as $key => $val) {}
echo $value;
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Last modified: 16 May 2022