What are some potential pitfalls to be aware of when combining and iterating through multiple arrays in PHP?

One potential pitfall when combining and iterating through multiple arrays in PHP is ensuring that the arrays are of equal length. If the arrays have different lengths, it can lead to unexpected behavior or errors when trying to access elements that do not exist in one of the arrays. To solve this issue, you can use the `count()` function to check the length of each array before combining and iterating through them. 

$array1 = [1, 2, 3];
$array2 = ['a', 'b', 'c'];

if (count($array1) === count($array2)) {
    $combinedArray = array_combine($array1, $array2);

    foreach ($combinedArray as $key => $value) {
        echo $key . ' => ' . $value . PHP_EOL;
    }
} else {
    echo 'Arrays are not of equal length';
}

Keywords

array_merge array_combine foreach array_intersect array_keys

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