Retrieving the data size in bytes of a PHP ini configuration value

Published on 2024-08-18 • Modified on 2024-08-18

This snippet shows how to retrieve the data size in bytes of a PHP ini configuration value. We can use the ini_parse_quantity function introduced in PHP 8.2. It can accept various arguments; here are the examples extracted form the official PHP documentation:

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<?php

declare(strict_types=1);

namespace App\Controller\Snippet;

/**
 * I am using a PHP trait to isolate each snippet in a file.
 * This code should be called from a Symfony controller extending AbstractController (as of Symfony 4.2)
 * or Symfony\Bundle\FrameworkBundle\Controller\Controller (Symfony <= 4.1).
 * Services are injected in the main controller constructor.
 */
trait Snippet314Trait
{
    public function snippet314(): void
    {
        echo '1024: ', ini_parse_quantity('1024'),PHP_EOL;
        echo '1024M: ', ini_parse_quantity('1024M') ,PHP_EOL;
        echo '512K: ', ini_parse_quantity('512K') ,PHP_EOL;
        echo '0xFFk: ', ini_parse_quantity('0xFFk') ,PHP_EOL;
        echo '0b1010k: ', ini_parse_quantity('0b1010k') ,PHP_EOL;
        echo '0o1024: ', ini_parse_quantity('0o1024') ,PHP_EOL;
        echo '01024: ', ini_parse_quantity('01024') ,PHP_EOL;
        // echo ini_parse_quantity('Foobar'); // Warning: Invalid quantity "Foobar": no valid leading digits, interpreting as "0" for backwards compatibility
        // echo ini_parse_quantity('10F'); // Warning: Invalid quantity "10F": unknown multiplier "F", interpreting as "10" for backwards compatibility

        // That's it! 😁
    }
}

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