What are the potential pitfalls of using the PHP foreach loop in the context of iterating through arrays?

One potential pitfall of using the PHP foreach loop is that it does not maintain a reference to the array element being iterated over. This means that any modifications made to the current element within the loop will not affect the original array. To solve this issue, you can use the reference operator "&" when defining the loop variable to create a reference to the array element. 

$colors = ['red', 'green', 'blue'];

foreach ($colors as &$color) {
    $color = strtoupper($color);
}

print_r($colors);

Keywords

foreach loop PHP arrays iteration pitfalls

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