Random String Generator function in PHP

Sometimes it becomes necessary to generate some random string code for verifying account email or to generate default password for user accounts. So today I’ll provide you code for a user defined function that’ll  help you to generate random string .

function rand_string( $length )  
{
$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$size = strlen( $chars ); 
for( $i = 0; $i < $length; $i++ ) 
{
$str .= $chars[ rand( 0, $size - 1 ) ];
}
return $str; 
 }