post.php

<?php 
require 'core/init.php';

	$pk = $_POST['pk']; //primary key aka ID
	$name = $_POST['name']; //name of the field
    $value = $_POST['value']; //value of the field
    
    echo $pk
    echo $name
    echo $value
    

    if (!empty($value)){
    	echo escape($value);
    	$result = mysql_query('UPDATE Restaurants SET '.mysql_escape_string($name).'="'.mysql_escape_string($value).'" where r_id = "'.mysql_escape_string($pk).'"');
    	print_r($_POST);
    } else {
    	header('HTTP 400 Bad Request', true, 400);
    	echo "This field is required!";
    }

?>