Login logic

login.php

<?php

  $user = sql_select_first( $user_table, '*', "email = '" . secure( $form['email'] ) . "' AND password = '" . secure( $form['password'] ) . "'", '' );

  if ( count( $user ) > 0 ) {
    $_SESSION['user'] = $user;
    // ...
  } else {
    $_SESSION['user_warning'] = 'Login failed:<br />Email address and password did not match';
    // ...
  }