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 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!" ;
?> |
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 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!" ;
?> |
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