Help creating a diagnosis function in php

Laguna

Newbie here totally noob at php and mysql

Basically i dont understand how to do a Diagnosis functions which is i am building a medical websites where the members check the checkbox which has a symptom of what they are having flue, fever all that

and it will then give a result of what diseases they are having

I have no idea where to start to built such a diagnosis functions the things that i have learn only which NOW my system can only do is login ,register new member all that but i still have no idea on doing the diagnosis function ?

can anyone tell me what should i know to do the diagnosis function ???

wilku

Read about forms for starters e.g. http://www.onlamp.com/pub/a/php/2003/03/13/php_foundations.html
You'll learn how to deal with checkboxes and input boxes (for symptoms, temperature and so on).
Then you'll have to create some dagnosis algorithm - give possible diseases based on symptoms. Can't help you there though, because I don't know anything about it (apart from running nose and fewer probably means cold 😉 ).

The sketch of what it can look like:

//if the form is submitted, process user input
if (isset($_POST['submitted']))
{
 //verify user input
 $result = true;
 if (is_numeric($_POST['temp']))
 {
   echo "Temperature should be numeric";
   $ready = false;
  }
  //check as many conditions as you like

  if ($_POST['temp']>42 || $_POST['temp']<30)
 {
   echo "You should be dead by now.";
   $ready = false;
  }

 //if all's well, process data
 if ($ready)
 {
   if ($_POST['temp']>37.5 && isset($_POST['running_nose'])) echo "You probably have cold.";
 }
 else DrawForm(); //data wasn't validated, so draw the form once again
}
else //form isn't submitted yet, so draw the form
{
  DrawForm();
}

function DrawForm()
{
 echo <<END
  <form action="$_SERVER[PHP_SELF]" method="POST">
   Temperature: <input type="text" name="temp">
   Running nose: <input type="checkbox" name="running_nose">
   <input type="submit" value="Send" name="submitted">
  </form>
END;
}

Laguna

wilku wrote:
Read about forms for starters e.g. http://www.onlamp.com/pub/a/php/2003/03/13/php_foundations.html
You'll learn how to deal with checkboxes and input boxes (for symptoms, temperature and so on).
Then you'll have to create some dagnosis algorithm - give possible diseases based on symptoms. Can't help you there though, because I don't know anything about it (apart from running nose and fewer probably means cold 😉 ).

The sketch of what it can look like:
//if the form is submitted, process user input
if (isset($_POST['submitted']))
{
 //verify user input
 $result = true;
 if (is_numeric($_POST['temp']))
 {
   echo "Temperature should be numeric";
   $ready = false;
  }
  //check as many conditions as you like

  if ($_POST['temp']>42 || $_POST['temp']<30)
 {
   echo "You should be dead by now.";
   $ready = false;
  }

 //if all's well, process data
 if ($ready)
 {
   if ($_POST['temp']>37.5 && isset($_POST['running_nose'])) echo "You probably have cold.";
 }
 else DrawForm(); //data wasn't validated, so draw the form once again
}
else //form isn't submitted yet, so draw the form
{
  DrawForm();
}

function DrawForm()
{
 echo <<END
  <form action="$_SERVER[PHP_SELF]" method="POST">
   Temperature: <input type="text" name="temp">
   Running nose: <input type="checkbox" name="running_nose">
   <input type="submit" value="Send" name="submitted">
  </form>
END;
}

wow thanks man you just save my life oooo so basically this is how it should works oooo

But the diagnosis algortihm hmm meaning that it somehow it will check for the symptoms and sends the search query to the database and out put it back ? you mean something like this ??

anyway thanks a lot at least i got some clue about this 😃

wilku

Yes, diagnosis can be based on database query, like select all records (diseases) which have the symptoms as given by user. You just have to think more about the structure of your database (all in one table, or set of symptoms in one table, set of deseases in another, cross-references in the third table, or ... think of something suitable 😉 ).

Laguna

Hmm basically what consist in the diagnosis algorithm ??🙂

wilku

I see it that way:
Lets say you can have one numerical parameter - temperature. Then a bunch of true/false parameters, like sweat, running nose, shivers.
So you can make a table in your database:

| Temperature_min | Temperature_max | sweat | running nose | shivers | name
|        35.5     |         36.2    |   0   |       0      |      1  | disease1
|        36.5     |       39.0      |   1   |       0      |      1  | disease2
|        38.2     |       42.0      |   1   |       1      |      0  | disease3

Now you can do searches for diseses:

 SELECT name FROM diseases WHERE $temperature > Temperature_min AND $temperature < Temperature_max AND sweat=$has_sweat AND running_nose=$has_running_nose AND shivers=$has_shivers

The drawback is, that the structure is not flexible and adding one parameter would lead to restructuring your table.

You can try to divide information to different tables (for diseases, available parameters, parameter values etc.). But then you really need to dig into mysql queries to do some joins in order to retrieve information you need.

Laguna

wilku wrote:
I see it that way:
Lets say you can have one numerical parameter - temperature. Then a bunch of true/false parameters, like sweat, running nose, shivers.
So you can make a table in your database:
| Temperature_min | Temperature_max | sweat | running nose | shivers | name
|        35.5     |         36.2    |   0   |       0      |      1  | disease1
|        36.5     |       39.0      |   1   |       0      |      1  | disease2
|        38.2     |       42.0      |   1   |       1      |      0  | disease3
Now you can do searches for diseses:
 SELECT name FROM diseases WHERE $temperature > Temperature_min AND $temperature < Temperature_max AND sweat=$has_sweat AND running_nose=$has_running_nose AND shivers=$has_shivers
The drawback is, that the structure is not flexible and adding one parameter would lead to restructuring your table.

You can try to divide information to different tables (for diseases, available parameters, parameter values etc.). But then you really need to dig into mysql queries to do some joins in order to retrieve information you need.

Err got a question yup we if the person check if he has sweat true and running nose false = this disease i mean for example

and after that when should the Sql query which you have shown should be executed ??

wilku

Remember the first example? Instead of if statement for checking temperature and running nose run the query here.
As for true/false vs checkbox:

//i'm not sure, but this should be enough
$has_cold = isset($_POST['cold']);

Shrike

Am I the only one slightly worried by this idea? 😉

Laguna

SO basically i discuss with my lecturer about how the diagnosis should work

i am not sure it will work this way


because we somehow loop trough the symptoms we are having then only executes the Sql query statement 
for(checked)
   for(i=0 ; i <=3 (if there is only 3 diseases ) ; i++)
{

  if(disease[i].checked)
{

 shiver = 1
headache = 1 (basically 1 is true if the user ticks the checkbox)
}

/* afer that only the my sql search query should work

Search * from table diseases where  ....

will this idea work ??

rikmoncur

If it's any help, here's a working medical self help guide:

http://www.nhs24.com/html/content/default.asp?page=s2_10_1

Laguna

wilku wrote:
Read about forms for starters e.g. http://www.onlamp.com/pub/a/php/2003/03/13/php_foundations.html
You'll learn how to deal with checkboxes and input boxes (for symptoms, temperature and so on).
Then you'll have to create some dagnosis algorithm - give possible diseases based on symptoms. Can't help you there though, because I don't know anything about it (apart from running nose and fewer probably means cold 😉 ).

The sketch of what it can look like:
//if the form is submitted, process user input
if (isset($_POST['submitted']))
{
 //verify user input
 $result = true;
 if (is_numeric($_POST['temp']))
 {
   echo "Temperature should be numeric";
   $ready = false;
  }
  //check as many conditions as you like

  if ($_POST['temp']>42 || $_POST['temp']<30)
 {
   echo "You should be dead by now.";
   $ready = false;
  }

 //if all's well, process data
 if ($ready)
 {
   if ($_POST['temp']>37.5 && isset($_POST['running_nose'])) echo "You probably have cold.";
 }
 else DrawForm(); //data wasn't validated, so draw the form once again
}
else //form isn't submitted yet, so draw the form
{
  DrawForm();
}

function DrawForm()
{
 echo <<END
  <form action="$_SERVER[PHP_SELF]" method="POST">
   Temperature: <input type="text" name="temp">
   Running nose: <input type="checkbox" name="running_nose">
   <input type="submit" value="Send" name="submitted">
  </form>
END;
}

err wilku can you check if this works ??

<?
//if the form is submitted, process user input
if (isset($_POST['submitted']))
{
//verify user input
$result = true;
if (is_numeric($_POST['temp']))
{
   echo "Temperature should be numeric";
   $ready = false;
  }
  //check as many conditions as you like

  if ($_POST['temp']>42 || $_POST['temp']<30)
{
   echo "You should be dead by now.";
   $ready = false;
  }

//if all's well, process data
if ($ready)
{
   if ($_POST['temp']>37.5 && isset($_POST['running_nose'])) echo "You probably have cold.";
}
else DrawForm(); //data wasn't validated, so draw the form once again
}
else //form isn't submitted yet, so draw the form
{
  DrawForm();
}

function DrawForm()
{
include 'testdiagnosis.php';
} 
?>

it seems like when i type in numeric numbers it keep saying temperature should be numeric ??

wilku

Of course there is a mistake. If temp is numeric, everything is all right so it should be

if (!is_numeric($_POST['temp']))
{
   echo "Temperature should be numeric";
   $ready = false;
  }

Laguna

wilku wrote:
Of course there is a mistake. If temp is numeric, everything is all right so it should be
if (!is_numeric($_POST['temp']))
{
   echo "Temperature should be numeric";
   $ready = false;
  }

ooo i got it

but

if ($ready)
{
   if ($_POST['temp']>37.5 && isset($_POST['running_nose'])) echo "You probably have cold.";
}

some how this statement
doesnt run i know it checks for the temperature is functioning but some how i am not sure is it checking for running nose ?? because i put in temp 38 and check running nose it doesnt come out you probably have cold

PLus do i have to declare $ready variable ?? 🙂