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

$string = 'helloworld';

//generate a random position between 0 and string length ( note the -1 )
$randPos = mt_rand(0, strlen($string)-1);

echo 'Position : ' . $randPos . "\n";
echo 'Character : ' . $string[$randPos] . "\n";