How to generate a random array in PHP
By Shristi RaniThis tutorial will teach us how to generate a random array in PHP. This tutorial contains various ways to generate a random array. Hope this tutorial is helpful to you. Let’s get started.
Generate Random Array in PHP
An array is a linear data structure. In this arrangement of elements such that elements are of the same type and memory allocation is contiguous. To generate a random array in PHP we will see two methods.
First, we will generate a random number between 0 to 100 and store it in one variable. Then we will use the shuffle() function in PHP to shuffle the generated random number. Now we will use the array_slice() method in PHP, and finally, generate a random array.
Below is the given syntax to perform our task:
array_slice(array, starting point, length of an array, preserve)
Now let’s look at our code:
<!DOCTYPE html> <html> <body> <?php $random_number_range = range(0, 100); shuffle($random_number_range ); $random_number_array_generated = array_slice($random_number_range ,0,10); print_r($random_number_array_generated); ?> </body> </html>
OUTPUT: Array ( [0] => 53 [1] => 99 [2] => 54 [3] => 52 [4] => 21 [5] => 94 [6] => 11 [7] => 38 [8] => 8 [9] => 97 )
Another way to generate a random array in PHP. Here in this we first declare a variable of a particular size. Then we create a variable for storing an array value in it. We use a for loop to iterate for every element in an array and then we generate a random array value and assign it to each variable.
Syntax:
array_rand(array, number) It basically generate an array for random keys and returns an array.
<!DOCTYPE html>
<html>
<body>
<?php
$numberOfItems = 10;
$numbers = range(0, $numberOfItems-1);
$rands = array();
for ($i=0; $i < $numberOfItems; $i++) {
$ok = false;
while (!$ok) {
$x = array_rand($numbers);
$ok = !in_array($numbers[$x], $rands) && $numbers[$x] != $i;
}
$rands[$i] = $numbers[$x];
unset($numbers[$x]);
}
var_dump($rands);
?>
</body>
</html>
OUTPUT:
array(10) {
[0]=> int(1)
[1]=> int(3)
[2]=> int(8)
[3]=> int(0)
[4]=> int(2)
[5]=> int(4)
[6]=> int(7)
[7]=> int(5)
[8]=> int(9)
[9]=> int(6)
}Hope you liked this video. Happy Learning!!!!!
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