# 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 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

    <?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)

    ?>

### 参见

- is_array() - 检测变量是否是数组