The Ds\Map::count() function is an inbuilt function in PHP which is used to count the number of elements present in the Map. It also referred to the size of the Map.
Syntax:
int public Ds\Map::count()
Parameters: This function does not accept any parameter.
Return value: This function returns the number of elements present in the Map.
Below programs illustrate the Ds\Map::count() function in PHP:
Program 1:
<?php // PHP program to illustrate the count() // function of Ds\map // Creating a Map $map = new \Ds\Map([
"1" => "Geeks" ,
"2" => "for" ,
"3" => "Geeks"
]); // Display the map elements print_r( $map );
echo "Number of elements present in map: " ;
print_r( $map -> count ());
?> |
Output:
Ds\Map Object ( [0] => Ds\Pair Object ( [key] => 1 [value] => Geeks ) [1] => Ds\Pair Object ( [key] => 2 [value] => for ) [2] => Ds\Pair Object ( [key] => 3 [value] => Geeks ) ) Number of elements present in map: 3
Program 2:
<?php // PHP program to illustrate the count() // function of Ds\map // Creating a Map $map = new \Ds\Map([ "1" => "10" ,
"2" => "20" , "3" => 30, "4" => 40]);
// Print map elements print_r( $map );
echo "Number of elements present in map: " ;
print_r( $map -> count ());
echo "\n" ;
// Creating another Map $map = new \Ds\Map([1 => "Welcome" ,
2 => "to" , 3 => "GeeksforGeeks" ]);
// Print map elements print_r( $map );
echo "Number of elements present in map: " ;
print_r( $map -> count ());
?> |
Output:
Ds\Map Object ( [0] => Ds\Pair Object ( [key] => 1 [value] => 10 ) [1] => Ds\Pair Object ( [key] => 2 [value] => 20 ) [2] => Ds\Pair Object ( [key] => 3 [value] => 30 ) [3] => Ds\Pair Object ( [key] => 4 [value] => 40 ) ) Number of elements present in map: 4 Ds\Map Object ( [0] => Ds\Pair Object ( [key] => 1 [value] => Welcome ) [1] => Ds\Pair Object ( [key] => 2 [value] => to ) [2] => Ds\Pair Object ( [key] => 3 [value] => GeeksforGeeks ) ) Number of elements present in map: 3
Reference: https://www.php.net/manual/en/ds-map.count.php