PHP | Ds\Vector unshift() Function
Last Updated :
22 Aug, 2019
The Ds\Vector::unshift() function is an inbuilt function in PHP which is used to adds elements to the front of vector. This function moves all the elements in the vector towards forward and adds the new element to the front.
Syntax:
void public Ds\Vector::unshift( $values )
Parameters: This function accepts single parameter $values which holds the values to be added to the vector.
Return Value: This function does not return any value.
Below programs illustrate the Ds\Vector::unshift() function in PHP:
Program 1:
<?php
$vect = new \Ds\Vector([3, 6, 1, 2, 9, 7]);
echo ( "Original vector:\n" );
print_r( $vect );
echo ( "\nArray elements after inserting new element\n" );
$vect ->unshift(10, 20, 30);
print_r( $vect );
?>
|
Output:
Original vector:
Ds\Vector Object
(
[0] => 3
[1] => 6
[2] => 1
[3] => 2
[4] => 9
[5] => 7
)
Array elements after inserting a new element
Ds\Vector Object
(
[0] => 10
[1] => 20
[2] => 30
[3] => 3
[4] => 6
[5] => 1
[6] => 2
[7] => 9
[8] => 7
)
Program 2:
<?php
$vect = new \Ds\Vector([ "geeks" , "for" , "geeks" ]);
echo ( "Original vector:\n" );
print_r( $vect );
echo ( "\nArray elements after inserting new element\n" );
$vect ->unshift( "PHP articles" );
print_r( $vect );
?>
|
Output:
Original vector:
Ds\Vector Object
(
[0] => geeks
[1] => for
[2] => geeks
)
Array elements after inserting a new element
Ds\Vector Object
(
[0] => PHP articles
[1] => geeks
[2] => for
[3] => geeks
)
Reference: http://php.net/manual/en/ds-vector.unshift.php
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