PHP SplObjectStorage contains() Function

The SplObjectStorage::contains() function is an inbuilt function in PHP which is used to check the storage object contains a specified object or not.

Syntax:

bool SplObjectStorage::contains( $value )

Parameters: This function accepts a single parameter $value which specifies the storage object which is going to check.

Return Value: This function returns true if storage object contains specified object otherwise return false.

Below programs illustrate the SplObjectStorage::contains() function in PHP:

Program 1:

<?php
$gfg1 = new StdClass;
$gfg2 = new StdClass;

// Declare Empty SplObjectStorage
$str = new SplObjectStorage();

$str[$gfg1] = "GeeksforGeeks";

// Print result
var_dump($str->contains($gfg1));
var_dump($str->contains($gfg2));

?>

Output:

bool(true)
bool(false)

Program 2:

<?php
$gfg1 = new StdClass;
$gfg2 = new StdClass;

// Declare Empty SplObjectStorage
$str = new SplObjectStorage();

$str[$gfg1] = "GeeksforGeeks";

// Print result
var_dump($str->contains($gfg1));
var_dump($str->contains($gfg2));

// detach and print result
$str->detach($gfg1);
var_dump($str->contains($gfg1));

?>

Output:

bool(true)
bool(false)
bool(false)

Reference: https://www.php.net/manual/en/splobjectstorage.contains.php