Bước 9: Xây dựng buildConditions WHERE (ok)

<?php  
  $condition =   array (
    'email' => '[e-mail]',
    'password' => '7c4a8d09ca3762af61e59520943dc26494f8941b',
  );
  function buildConditions($condition) {
    // $condition is
    //  array (
    //   'email' => '[e-mail]',
    //   'password' => '7c4a8d09ca3762af61e59520943dc26494f8941b',
    // )
    $keywords = array(
      '>=', 
      '<=', 
      '>', 
      '<', 
      'IN', 
      'NOT', 
      'IS', 
      'LIKE', 
      '!=', 
      '<>'
    );
    if (empty($condition)) return;
    $sql            = '';
    $index          = 0;
    $conditionArray = array();
    foreach ($condition as $field => $sub) {
      $math   = '';
      $subVal = explode(' ', $sub);
      // $subVal is
      // array (
      //   0 => '[e-mail]',
      // )
      if (!in_array($subVal[0], $keywords)) {
        $math = '=';
      }
      $conditionArray[] = " " . $field . " " . $math . " '" . $sub . "'";
      // array (
      //   0 => "email = '[e-mail]'",
      //   1 => "password = '7c4a8d09ca3762af61e59520943dc26494f8941b'",
      // )
    }
    return " WHERE " . implode(' AND ', $conditionArray);
    // "WHERE  email = '[e-mail]' AND  password = '7c4a8d09ca3762af61e59520943dc26494f8941b'"
  };
  echo buildConditions($condition);
  // "WHERE  email = '[e-mail]' AND  password = '7c4a8d09ca3762af61e59520943dc26494f8941b'"
?>