How can unsupported operand types error be avoided when working with arrays in PHP?

When working with arrays in PHP, the unsupported operand types error can occur when trying to perform operations like addition or subtraction on arrays that are not supported. To avoid this error, make sure to check the data types of the arrays before performing any operations on them. You can use functions like is_array() to verify the data type before proceeding with the operation. 

$array1 = [1, 2, 3];
$array2 = [4, 5, 6];

if (is_array($array1) && is_array($array2)) {
    $result = array_map(function ($a, $b) { return $a + $b; }, $array1, $array2);
    print_r($result);
} else {
    echo "Unsupported operand types";
}

Keywords

PHP arrays unsupported operand types error type checking

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