PHP 8.1.0 RC 2 available for testing


(PHP 7 >= 7.1.0)

is_iterable Verify that the contents of a variable is an iterable value


is_iterable ( mixed $value ) : 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



The value to check

Valorile întoarse

Returns true if value is iterable, false otherwise.


Example #1 is_iterable() examples


(is_iterable([123]));  // bool(true)
var_dump(is_iterable(new ArrayIterator([123])));  // 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)


A se vedea și

  • is_array() - Determină dacă o variabilă este un array

add a note add a note

User Contributed Notes 3 notes

mopsyd at me dot com
3 years ago
A slight correction to brcontainer's polyfill, which prevents errors on a non-object in a non-blocking way, and also corrects the issue of  the conditional checking "file_exists" instead of the correct "function_exists":

if ( !function_exists(  'is_iterable' ) )

    function is_iterable( $obj )
        return is_array( $obj ) || ( is_object( $obj ) && ( $obj instanceof \Traversable ) );


The original answer would not have resolved correctly, because it was looking for a file instead of a function, and the provided method would error if given a non-iterable non-object value such as false.
brcontainer at yahoo dot com dot br
3 years ago
Polyfill for PHP5.6 and PHP7.0

    if (!file_exists('is_iterable')) {
        function is_iterable($obj)
            return is_array($obj) || $obj instanceof \Traversable;
To Top