PHP | Ds\Vector first() Function

The Ds\Vector::first() function is an inbuilt function in PHP which is used to find the first element in the vector.

Syntax:

mixed public Ds\Vector::first( void )

Parameters: This function does not accept any parameter.



Return Value: This function returns the first element present in the vector.

Below programs illustrate the Ds\Vector::first() function in PHP:

Program 1:

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<?php
  
// Create vector elements
$vector = new \Ds\Vector([1, 2, 3, 4, 5]);
  
  
echo("First element of the vector: ");
  
// Use first() function to find
// the first element
var_dump($vector->first());
  
?>

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Output:

First element of the vector: int(1)

Program 2:

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<?php
  
// Create vector elements
$vector = new \Ds\Vector(["geeks", "for", "geeks"]);
  
  
echo("First element of the vector: ");
  
// Use first() function to find
// the first element
var_dump($vector->first());
  
?>

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Output:

First element of the vector: string(5) "geeks"

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



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