(PHP 7 >= 7.1.0, PHP 8)
is_iterable — Verify that the contents of a variable is an iterable value
Verify that the contents of a variable is accepted by the iterable pseudo-type, i.e. that it is either an array or an object implementing Traversable
valueThe value to check
Returns true if value is iterable, false
otherwise.
示例 #1 is_iterable() examples
<?php
var_dump(is_iterable([1, 2, 3])); // bool(true)
var_dump(is_iterable(new ArrayIterator([1, 2, 3]))); // bool(true)
var_dump(is_iterable((function () { yield 1; })())); // bool(true)
var_dump(is_iterable(1)); // bool(false)
var_dump(is_iterable(new stdClass())); // bool(false)
?>