array_shift : Only variables should be passed by reference error in php

Hey,

I actually encountered this exact issue a while back, so I can definitely help you out! The "Only variables should be passed by reference" error in PHP is quite common when using the `array_shift` function.

In my case, the error occurred because I was inadvertently using an expression rather than a variable as the argument for `array_shift`. Make sure that the argument you're passing is a variable that holds the array you want to modify.

Here's an example of how I fixed it in my code:

php
$myArray = [1, 2, 3, 4, 5];

$tempArray = $myArray;  // Copy the array to a temporary variable

array_shift($tempArray);  // Use the temporary array as the argument

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Hey there!

I've encountered this error before when using the `array_shift` function in PHP. The "Only variables should be passed by reference" error typically occurs when you try to pass an expression or a constant value to `array_shift` instead of a variable.

In your code, it seems like you are declaring the array directly as `[1, 2, 3, 4, 5]`. Try assigning it to a variable first, like this:

php
$myArray = [1, 2, 3, 4, 5];

array_shift($myArray);

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