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PHP | Ds\Map hasKey() Function

  • Last Updated : 20 Aug, 2019

The Ds\Map::hasKey() function in PHP is used to check whether a given Key is present in the Map object or not. It accepts the key to be checked as a parameter and return True if the key is present in the Map otherwise it returns False.

Syntax:

bool public Ds\Map::hasKey ( mixed $key )

Parameter: It accepts a Key to be checked as a parameter. The key is of the mixed type that is it can be a string or an integer or any other type of value.

Return value: This function returns a boolean value True or False based on whether the given key is present in the Map or not.

Below program illustrate the Ds\Map::hasKey() function of Ds\Map:



Program 1:




<?php
// PHP program to illustrate the hasKey()
// function of Ds\map
  
// Creating a Map
$map = new \Ds\Map(["1" => 5, 
            "2" => 10, "3" => 15]);
  
// check if the key "1" is present in the Map
var_dump($map->hasKey("1"));
  
?>

Output:

bool(true)

Program 2:




<?php
// PHP program to illustrate the hasKey()
// function of Ds\map
  
// Creating a Map
$map = new \Ds\Map(["Geeks" => "1"
            "for" => "2", "Geeks" => "3"]);
  
// Check if the key "Geeks" is 
// present in the Map
var_dump($map->hasKey("Geeks"));
  
?>

Output:

bool(true)

Reference: http://php.net/manual/en/ds-map.clear.php

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