PHP | Ds\Set first() Function
Last Updated :
21 Jan, 2021
Improve
The Ds\Set::first() function is an inbuilt function in PHP which returns the first element of the Set.
Syntax:
void public Ds\Set::first( void )
Parameter: This function does not accept any parameter.
Return value: This function returns the first value of the Set.
Below programs illustrate the Ds\Set::first() function in PHP:
Program 1:
<?php
// PHP program to illustrate the
// Ds\set::first() function
// Create a set instance
$set = new \Ds\Set();
// Adding elements to Set
$set->add("Welcome");
$set->add("to");
$set->add("GfG");
// Print the first element from set
print_r($set->first());
?>
Output:
Welcome
Program 2:
<?php
// PHP program to illustrate the
// Ds\set::first() function
// Create a set instance
$set = new \Ds\Set();
// Adding elements to Set
$set->add("10");
$set->add("20");
$set->add("30");
// Print the first element from set
print_r($set->first());
?>
Output:
10
Reference: http://php.net/manual/en/ds-set.first.php
