Php/docs/function.is-iterable
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is_iterable
(PHP 7 >= 7.1.0)
is_iterable — Verify that the contents of a variable is an iterable value
说明
is_iterable
( mixed $var
) : bool
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
参数
var- The value to check
返回值
Returns true if var is iterable, false
otherwise.
范例
Example #1 is_iterable() examples
<?phpvar_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)?>
