Question

I’m new to PHP programming and have poor knowledge about it, but I want to use it to make web services to my client Android application…

I began making my first web service with PHP and it’s working fine, but I want to know how I can make one file that has all my functions and methods that I need and how to call it from Android

Thank you

This is functions.php

    <?php
   function GetAllRest()
    {
    mysql_connect("localhost","root","root");
    mysql_select_db("myhoteldb");
     $sql=mysql_query("SELECT rest_id ,rest_name,cuisine,no_tables,bg_img,rest_logo      FROM  restaurant");
  while($row=mysql_fetch_assoc($sql))
  $output[]=$row;
  print(json_encode($output));
  mysql_close();
}
function GetAllCategory($lang_id,$rest_id)
{
    mysql_connect("localhost","root","root");
    mysql_select_db("myhoteldb");
    $sql=mysql_query("SELECT cat_lang.rowid ,cat_lang.cat_id as _id,lang_id,   cat_name,cat_description from cat_lang  ,menu_category WHERE lang_id= $lang_id  AND  restaurant= $rest_id ");

      while($row=mysql_fetch_assoc($sql))
     $output[]=$row;
     print(json_encode($output));
      mysql_close();

  }



   ?>

and the URL
http://localhost/mywebservices.php?op=GetAllCategory&lang_id=1&rest_id=1

and i got this error now

   Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in      

C:\xampp\htdocs\functions.php on line 22

   Notice: Undefined variable: output in C:\xampp\htdocs\functions.php on line 24
    null

Answer 1

As an idea, I’d recommend including the function name desired to run in your url.
And then, get that function name and arguments, pass them to php’s

call_user_func_array()

function.

Here’s a very basic idea of a function handler:

your request URL would look like this:

http://www.mysite.com/webservice.php?op=CallFunctionOne&param_a=test&param_b=test2

And here is the handler to route your calls to your functions:

require_once("./functions.php");

if(!empty($_SERVER["QUERY_STRING"])){
    $query_str = stripslashes($_SERVER['QUERY_STRING']);
    parse_str($query_str,$args);
    $op = array_shift($args);
    if(is_callable ($op)){
        call_user_func_array($op,$args);
    }
    else{
        echo "Handler error.<br />";
        echo $op . " function is not callable.";
    }
}

And functions.php file would include your functions.
Hope it will give some idea.