random_value()

function random_value( $length = 6, $characters = array( 'a', 'b', 'c' ) ) { // Parameters are optional.
 
	$data = ''; // Define empty string for later (return $data).
 
 
	$from_zero = count( $characters ) - 1; // Highest possible index of array $characters.
 
	for( $i = 0; $i < $length; $i++ ) { // Loop will execute the same times as value of variable $lenght.
 
		$data .= $characters[ mt_rand( 0, $from_zero ) ]; // Adds one random symbol from array $characters each time loop executes.
 
	}
 
 
	return $data;
 
} // By daGrevis.
 
 
##
 
 
echo random_value( 12, array( 'x', 'y', 0 ) ); // Usage with given parameters.
echo '<br />'; // Line break. xD
echo random_value(); // Usage without parameters (default would apply (see in function)).