Question

I got a problem with real_escape_string

code:

function mysql_escape($str){
    echo '<pre>';
    var_dump(self::$link);
    echo '</pre>';

    return self::$link->real_escape_string($str);
}

output:

object(mysqli)#1 (17) {
  ["affected_rows"]=>
  NULL
  ["client_info"]=>
  NULL
  ["client_version"]=>
  int(50051)
  ["connect_errno"]=>
  int(0)
  ["connect_error"]=>
  NULL
  ["errno"]=>
  NULL
  ["error"]=>
  NULL
  ["field_count"]=>
  NULL
  ["host_info"]=>
  NULL
  ["info"]=>
  NULL
  ["insert_id"]=>
  NULL
  ["server_info"]=>
  NULL
  ["server_version"]=>
  NULL
  ["sqlstate"]=>
  NULL
  ["protocol_version"]=>
  NULL
  ["thread_id"]=>
  NULL
  ["warning_count"]=>
  NULL
}



Warning:  mysqli::real_escape_string() [mysqli.real-escape-string]: Couldn't fetch mysqli in /usr/www/users/.../class/class.Data.php on line 188

Answer 1

Is the connection opened correctly? I assume you’ve got something like

self::$link = new mysqli(...);

If it can’t connect, it doesn’t return false, but an object, so in any case, your conditional always evaluates to true:

if (self::$link)
{
     echo "I'm always here!"
}

Try mysqli_connect_error() or self::$link->connect_error() (depending on your php version) as stated in mysqli::__construct