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PHP SplObjectStorage contains function ()

Syntax:
bool SplObjectStorage::contains ($value)
Parameters: This function takes one parameter $valuewhich specifies the storage object to be checked.Return value:This function returns true if the storage object contains the specified object, otherwise returns false.The following programs illustrate the function SplObjectStorage::contains()in PHP:Program 1: $gfg1 = new StdClass; $gfg2 = new StdClass;  
// Declare empty SplObjectStorage $str = new SplObjectStorage(); $str [ $gfg1 ] = " GeeksforGeeks " ;  
// Print the result var_dump ( $str -> contains ( $gfg1 )); var_dump ( $str -> contains ( $gfg2 ));  
?>
Exit:
bool (true ) bool (false)
Program 2: $gfg1 = new StdClass; $gfg2 = new StdClass;  
// Declare empty SplObjectStorage $str = new SplObjectStorage(); $str [ $gfg1 ] = " GeeksforGeeks " ;  
// Print the result var_dump ( $str -> contains ( $gfg1 )); var_dump ( $str -> contains ( $gfg2 ));  
// detach and print the result $str -> detach ( $gfg1 ); var_dump ( $str -> contains ( $gfg1 ));  
?>
Exit:
bool (true ) bool (false) bool (false)
Link: https : //www.php.net/manual/en/splobjectstorage.contains.php

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