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PHP Manual Variable handling Functions boolval debug_zval_dump doubleval empty floatval get_debug_type get_defined_vars get_resource_id get_resource_type gettype intval is_array is_bool is_callable is_countable is_double is_float is_int is_integer is_iterable is_long is_null is_numeric is_object is_real is_resource is_scalar is_string isset print_r serialize settype strval unserialize unset var_dump var_export   is_iterable is_null Variable handling Functions Last updated: Mon, 26 Oct 2026 is_long (PHP 4, PHP 5, PHP 7, PHP 8) is_long — Alias of is_int() Description This function is an alias of: is_int(). is_iterable is_null Variable handling Functions Last updated: Mon, 26 Oct 2026

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