Speeple » Join Speeple | People | Groups | Blogs | News

Speeple Core

Tagged Func Get Args

Page 1 of 1

  1. PHP Argument Overload via func_num_args() and func_get_args()

    Published: Wed, 16 July 2008, 04:40, also tagged: development, programming, php, functions, mysql, func num args

    MySQL provides functionality for checking if a column or value is in a set, for example:

    -- x IN(set) Example:
SELECT * FROM documents WHERE id IN(1, 20, 7, 18)

-- x NOT IN(set) Example:
SELECT * FROM documents WHERE id NOT IN(21, 5, 4, 13)

    Using PHP’s function overloading we can easily emulate this method in PHP:

    <?php
function in() {
        if (func_num_args() < 2) return false; // Nothing to compare

        $args = array_flip(array_slice(func_get_args(), 1)); // Remove first array item, flip the array so fast key lookup can be used – bypasses slow loops

        return isset($args[func_get_arg(0)]); // Look up using array key – faster than using loops & less code
}
?>

    Usage Examples:

    … Continue Reading »

    Related Blog Posts