Question

I have a problem with passing variables as reference in PHP.

I want to set $grand_total after:

$data = array('title' => 'blabla', 'value' => &$grand_total);

// Set after
$grand_total += 50;

This is running without a problem, but when I pass $grand_total var using a function, I get the error below:

PHP Error was encountered Severity: 8192 Message: Call-time
pass-by-reference has been deprecated Filename:
controllers/checkout.php Line Number: 131

I’m passing the variable like this:

$data = array('title' => 'blabla', 'value' => price(&$grand_total));

// Set after
$grand_total += 50;

I must use the price() function.

Can anyone help me?

I’m sorry for my bad English.

Answer 1

This would work perfectly fine for you

    $grand_total = 10;
    function &price($value)
    {
        $value += 10;
        return $value ;
    }
    $grand_total = price($grand_total);
    $data = array('title' => 'blabla', 'value' =>$grand_total);
    $grand_total += 50;
    var_dump($grand_total)

Output

    int 70

For more Information

https://www.php.net/manual/en/language.references.php

https://www.php.net/manual/en/language.references.pass.php

Thanks
🙂