ReflectionParameter::isArray Checks if parameter expects an array &warn.deprecated.function-8-0-0; See the example below for an alternative way to derive this information. &reftitle.description; public boolReflectionParameter::isArray Checks if the parameter expects an array. &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; &true; if an array is expected, &false; otherwise. &reftitle.examples; As of PHP 8.0.0, the following code will report if a type declares arrays, including as part of a union. getType(); if (!$reflectionType) return false; $types = $reflectionType instanceof ReflectionUnionType ? $reflectionType->getTypes() : [$reflectionType]; return in_array('array', array_map(fn(ReflectionNamedType $t) => $t->getName(), $types)); } ?> ]]> &reftitle.seealso; ReflectionParameter::isOptional