La función Ds\Sequence::reversed() es una función incorporada en PHP que se utiliza para devolver la copia inversa del elemento de secuencia.
Sintaxis:
Ds\Sequence abstract public Ds\Sequence::reversed ( void )
Parámetros: Esta función no acepta ningún parámetro.
Valor devuelto: esta función devuelve la copia invertida de los elementos de secuencia.
Los siguientes programas ilustran la función Ds\Sequence::reversed() en PHP:
Programa 1:
<?php
// Create new Sequence
$seq = new \Ds\Vector([1, 2, 3, 4, 5]);
// Display the sequence elements
print_r($seq);
echo("After reversing the sequence elements\n");
// Use reversed() function to reverse
// the copy of sequence and display it
print_r($seq->reversed());
?>
Producción:
Ds\Vector Object
(
[0] => 1
[1] => 2
[2] => 3
[3] => 4
[4] => 5
)
After reversing the sequence elements
Ds\Vector Object
(
[0] => 5
[1] => 4
[2] => 3
[3] => 2
[4] => 1
)
Programa 2:
<?php
// Create new Vector
$seq = new \Ds\Vector(["Geeks", "for", "Geeks",
"Computer", "Science", "Portal"]);
// Display the elements
print_r($seq);
echo("Sequence after reversing\n");
// Use reversed() function to reverse
// the element and display it
print_r($seq->reversed());
?>
Producción:
Ds\Vector Object
(
[0] => Geeks
[1] => for
[2] => Geeks
[3] => Computer
[4] => Science
[5] => Portal
)
Sequence after reversing
Ds\Vector Object
(
[0] => Portal
[1] => Science
[2] => Computer
[3] => Geeks
[4] => for
[5] => Geeks
)
Referencia: https://www.php.net/manual/en/ds-sequence.reversed.php