The shuffle Function
The shuffle function shuffles
an array so that its elements are in random
order. The function modifies the array itself:
this means the result of the function does not need
to be assigned anywhere - the changes will occur
to the array itself.
Syntax
shuffle(array &$array): bool
Example
Let's shuffle array elements in random order:
<?php
$arr = [1, 2, 3, 4, 5];
shuffle($arr);
var_dump($arr);
?>
Example . Usage
Let's fill an array with numbers from 1 to 10
so that they are in random order and
do not repeat. To do this, we will generate an array
with numbers from 1 to 10 using
range
and shuffle it using shuffle:
<?php
$arr = range(1, 10);
shuffle($arr);
var_dump($arr);
?>
Example . Usage
Let's create a ul list,
filled with random numbers from 1
to 10:
<?php
$arr = range(1, 10);
shuffle($arr);
echo '<ul>';
foreach ($arr as $elem) {
echo '<li>' . $elem . '</li>';
}
echo '</ul>';
?>
See Also
-
the
str_shufflefunction,
which shuffles string characters in random order -
the
array_randfunction,
which selects random values from an array -
the
mt_randfunction,
which generates random numbers
