What potential pitfalls should be considered when using array_combine() in PHP?

When using array_combine() in PHP, it's important to consider that the function expects both input arrays to have the same number of elements. If the arrays have different lengths, it will result in a warning and potentially unexpected behavior. To avoid this pitfall, you should ensure that both arrays are of equal length before using array_combine(). 

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

if(count($array1) == count($array2)){
    $combinedArray = array_combine($array1, $array2);
    print_r($combinedArray);
} else {
    echo "Arrays must have the same number of elements.";
}

Keywords

array_combine PHP associative arrays key mismatch error handling

Related Questions