PHP get_declared_interfaces() function usage and example

PHP Class/Object function reference manual

The get_declared_interfaces() function returns an array containing all declared interfaces

Syntax

get_declared_interfaces ( void );

Definition and usage

This function retrieves declared interfaces.

Parameter

Return value

　This function returns an array containing the names of all declared interfaces in the current script.

Online examples

The following is the usage of this function-

<?php
　　　print_r(get_declared_interfaces());
?>

It will produce the following results-

Array
(
　　　　[0] => Traversable
　　　　[1] => IteratorAggregate
　　　　[2] => Iterator
　　　　[3] => ArrayAccess
　　　　[4] => Serializable
　　　　[5] => Throwable
　　　　[6] => DateTimeInterface
　　　　[7] => Reflector
　　　　[8] => RecursiveIterator
　　　　[9] => OuterIterator
　　　　[10] => Countable
　　　　[11] => SeekableIterator
　　　　[12] => SplObserver
　　　　[13] => SplSubject
　　　　[14] => SessionHandlerInterface
　　　　[15] => SessionIdInterface
　　　　[16] => SessionUpdateTimestampHandlerInterface
　　　　[17] => JsonSerializable
)

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