a method of selecting random characters from given string

Question

Can anyone help me with a solution that pulls the position and value of a random character from a given string using PHP. For example I have a a string variable $string = \

Answer 1

Since noone mentinoned any utf8 (multibyte) safe method, here is mine:

mb_internal_encoding("UTF-8");
$possible="aábcdeéfghiíjklmnoóöópqrstuúüűvwxyzAÁBCDEÉFGHIÍJKLMNOÓÖŐPQRSTUÚVWXYZ";
$char=mb_substr($possible,rand(0, mb_strlen($possible) - 1),1);

Answer 2

First choose a random number < strlen($yourchain)-1;

Then substr($yourchain,$random,$random+1);

Answer 3

1. find the length of the string , ($length)
2. use random function to generate random value within that range , ($a=Random.get($length))
3. use substring function to get the value of the random position.($string.substring($a,1))

sorry i dont know syntax for php (java \m/)

Answer 4

$str = "helloworld";
$randIndex = rand(0,strlen($str));
echo $str[$randIndex]," is at $randIndex";

Answer 5

More internal overhead, but easy to read:

$str = 'helloworld';

$randChar = $str[array_rand(str_split($str))];

Answer 6

echo substr($string, rand(0, strlen($string)-1), 1);