How to insert records in external database with objective-C

I have a question, want to make an application to insert records in an external database, but does not work.
Does anyone help me?
This is my xCode code:

    NSString *url = [NSString stringWithFormat:@"",cajaNombre.text,cajaPoblacion.text];
    NSData *dataUrl = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];

    NSString *strResult = [[NSString alloc] initWithData:dataUrl encoding:NSUTF8StringEncoding];

and this, is my php code

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  •  <?php
       //Credenciales de la BBDD
       $db = "iphone";
       $host = 'localhost';
       $username = "dpbataller";
       $password = '1234';
       //Conectamos al servidor de la Base de datos
       $link = mysql_connect($host,$username,$password) or die("No se puede conectar");
       //Seleccionamos la BBDD
       @mysql_select_db($db) or die ("No se ha podido seleccionar a la base de datos");
       //Creamos un array para almacenar los resultados
       $arr = array();
       //Recogemos los valores
       //$nombre = $_POST['nombre'];
       //$poblacion = $_POST['poblacion'];
       //Lanzamos la consulta
       $consulta = mysql_query("INSERT INTO alumnos (id,nombre,poblacion)  VALUES  ('','$_POST[nombre]','$_POST[poblacion]')";

    and this is the message of Xcode console:

    2012-04-26 23:04:44.981 parse[902:f803] <br />
    <b>Parse error</b>:  syntax error, unexpected ';' in     <b>/Applications/XAMPP/xamppfiles/htdocs/mysql_iphone/insertar_alumno.php</b> on line <b>21</b><br />

    What am I doing wrong?

    Solutions Collect From Internet About “How to insert records in external database with objective-C”

    $consulta = mysql_query(“INSERT INTO alumnos (id,nombre,poblacion) VALUES (”,’$_POST[‘nombre’]’,’$_POST[‘poblacion’]’)”;