Validating the array type

The function is_array() returns true if a variable is an array.

$integer = 1337;
$array = [1337, 42];

is_array($integer); // false
is_array($array); // true

You can type hint the array type in a function to enforce a parameter type; passing anything else will result in a fatal error.

function foo (array $array) { /* $array is an array */ }

You can also use the gettype() function.

$integer = 1337;
$array = [1337, 42];

gettype($integer) === 'array'; // false
gettype($array) === 'array'; // true

Found a mistake? Have a question or improvement idea? Let me know.

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