How to Rotate Array Elements to the Left in PHP?

Rotating Array Elements to the Left in PHP

PHP provides a simple and effective way to "rotate" an array, meaning to move the first element to the last and renumber the indices accordingly. This can be achieved using the array_push() and array_shift() functions.

Example:

Suppose we have an array $numbers with the values 1, 2, 3, and 4. To rotate it to the left, we can use the following code:

<code class="php">$numbers = array(1, 2, 3, 4);
array_push($numbers, array_shift($numbers));

print_r($numbers);</code>

Output:

Array
(
    [0] => 2
    [1] => 3
    [2] => 4
    [3] => 1
)

Explanation:

1. The array_shift() function removes the first element from the $numbers array and returns its value. In this case, it removes 1 and returns it.
2. The array_push() function adds the specified value to the end of the $numbers array. In this case, it adds the value returned by array_shift() (which is 1) to the end of the array.
3. The result is that the first element of the array is now 2, followed by 3, 4, and finally 1.

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