php - converting from mysql to PDO username confirmation issue -


how convert mysql pdo? having issues trying code verify if username exists.

//check if user exists  $u_check = mysql_query("select username users username='$un'");  //count amount of rows username = $un  $check = mysql_num_rows($u_check);    if ($check == 0) {

you'd want prepared statement

$u_check = $pdo->prepare("select username users username= :username"); $u_check->execute(array(':username' => $un)); if($u_check->rowcount()) {

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