ArrayObject offsetExists() Function in PHP Last Updated : 26 Mar, 2019 Summarize Comments Improve Suggest changes Share Like Article Like Report The offsetExists() function of the ArrayObject class in PHP is used to whether a given offset or index is present in the ArrayObject or not. If it is present then the function returns a boolean True value otherwise it returns False. Syntax: bool offsetExists($index) Parameters: This function accepts a single parameter $index which is the index which is to be checked if it is present in the ArrayObject. Return Value: This function returns a boolean value True or False based on whether the index is present in the ArrayObject or not. Below programs illustrate the above function: Program 1: php <?php // PHP program to illustrate the // offsetExists() function $arr = array("geeks100", "geeks99", "geeks1", "geeks02"); // Create array object $arrObject = new ArrayObject($arr); // Print the ArrayObject print_r($arrObject); // Check if the Key 1 is present if($arrObject->offsetExists(1)) echo "\nThe key 1 is present!"; else echo "\nThe key 1 is not present!"; // Check if the Key 20 is present if($arrObject->offsetExists(20)) echo "\nThe key 20 is present!"; else echo "\nThe key 20 is not present!"; ?> Output: ArrayObject Object ( [storage:ArrayObject:private] => Array ( [0] => geeks100 [1] => geeks99 [2] => geeks1 [3] => geeks02 ) ) The key 1 is present! The key 20 is not present! Program 2: php <?php // PHP program to illustrate the // offsetExists() function $arr = array("Welcome"=>"1", "to" => "2", "GfG" => "3"); // Create array object $arrObject = new ArrayObject($arr); // Print the ArrayObject print_r($arrObject); // Check if the Key "Welcome" is present if($arrObject->offsetExists("Welcome")) echo "\nThe key Welcome is present!"; else echo "\nThe key Welcome is not present!"; // Check if the Key GfG is present if($arrObject->offsetExists("GfG")) echo "\nThe key GfG is present!"; else echo "\nThe key GfG is not present!"; ?> Output: ArrayObject Object ( [storage:ArrayObject:private] => Array ( [Welcome] => 1 [to] => 2 [GfG] => 3 ) ) The key Welcome is present! The key GfG is present! Reference: http://php.net/manual/en/arrayobject.offsetexists.php Comment More infoAdvertise with us Next Article PHP | ArrayObject getFlags() Function G gopaldave Follow Improve Article Tags : Web Technologies PHP PHP-function PHP-ArrayObject Similar Reads ArrayObject offsetGet() Function in PHP The offsetGet() function of the ArrayObject class in PHP is used to get the value present at a specific index at the ArrayObject. Syntax: mixed offsetGet($index) Parameters: This function accepts a single parameter $index for which corresponding value will be returned. Return Value: This function re 1 min read ArrayObject offsetSet() Function in PHP The offsetSet() function of the ArrayObject class in PHP is used to update the value present at a specific index in the ArrayObject. Syntax: void offsetSet($index, $val) Parameters: This function accepts two parameters $index and $val. This function updates the value present at the index, $index wit 1 min read ArrayObject offsetUnset() Function in PHP The offsetUnset() function of the ArrayObject class in PHP is used to unset the value preset at a specific index. In other words, it is used to remove a value present at a specific index in the ArrayObject. Syntax: void offsetUnset($index) Parameters: This function accepts a single parameter $index 2 min read PHP | ArrayIterator offsetExists() Function The ArrayIterator::offsetExists() function is an inbuilt function in PHP which is used to check the existence of offset at the given index. Syntax: bool ArrayIterator::offsetExists( mixed $index ) Parameters: This function accepts single parameter $index which holds the index value to check the exis 2 min read PHP | ArrayObject getFlags() Function The ArrayObject::getFlags() function is an inbuilt function in PHP which is used to get the behavior of flags of the ArrayObject. Syntax: int ArrayObject::getFlags( void ) Parameters: This function does not accept any parameters. Return Value: This function returns the behavior flags of the ArrayObj 2 min read PHP | ArrayIterator offsetSet() Function The ArrayIterator::offsetSet() function is an inbuilt function in PHP which is used to set the value for an offset. Syntax: void ArrayIterator::offsetSet( mixed $index, mixed $newval ) Parameters: This function accepts two parameters as mentioned above and described below: $index: This parameter hol 2 min read Like