產生隨機字串

generate_random_string.php

<?php //reference: http://stackoverflow.com/questions/5438760/generate-random-5-characters-string
function get_token( $length ) {

  $seed = str_split(
	'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
	); // and any other characters

	shuffle($seed); // probably optional since array_is randomized; this may be redundant

	$rand = '';

	foreach (array_rand($seed, $length) as $k) $rand .= $seed[$k];
	
	return $rand;
}

//usage example;

echo get_token(5);


//另一種方式，參考 http://stackoverflow.com/questions/4356289/php-random-string-generator
function generateRandomString($length) {
    $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $randomString = '';
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, strlen($characters) - 1)];
    }
    return $randomString;
}

echo generateRandomString(8);