PHP | Ds\Set first() Function

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 accepts 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:

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<?php
  
// PHP program to illustarte the 
// 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());
  
?>

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Output:

Welcome

Program 2:

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<?php
  
// PHP program to illustarte the 
// 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());
  
?>

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Output:

10

Reference: http://php.net/manual/en/ds-set.first.php



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