ask if any post data is present

[jimmyt1988]

I'm doing an ajax call from javascript using jquery library:

 

    ajaxCall: function(process, obj, type){     
        $.post("registration-post.php", type + "=" + process,
            function(data){
                if(data==""){
                    $(obj).css(registration.errorNotificationType, registration.validatedColour);
                }else{
                    $('.error').append($.trim(data) + "<br />");
                    $(obj).css(registration.errorNotificationType, registration.errorColour);
                    registration.progress = false;    
                }
            }
        );
    }

 

When the ajax calls the php page, I want the php page to know what post information the javascript has sent, rather than pre-defining what the PHP should be trying to retrive from the POST data.

 

Something like

 

          // pseudo

          $_POST["whateverwassentfromajax"]

 

I want to do this because I want to have one function doing everything. So in my javascript I am saying, check if the username and email have already been used...

But i dont want to call two different php functions.

 

//pseudo

function 1(){
      $_POST["username"];
}
function 2(){
      $_POST["email"];
}

 

Is there a special way to know which post data has been sent.

Or do i need to do a few if statements in php.

[marcus]

The question seems a bit ambiguous, I'm not sure if what I've derived is what you want but...

 

You can use array_keys on your $_POST variable. That will store just the names of the values sent. So if the user only passed username and email the array would be:

 

Array
(
    [0] => username
    [1] => email
)

[jimmyt1988]

I guess a better question would be:

 

if i didnt know what the field names were on a form... How could i get the data the form is sending.

 

so

 

$_POST["I dont need to know the field name, to know that i have something to recieve"]

[marcus]

You could check if

 

if(count($_POST) > 0){
// something has been posted
}

[jimmyt1988]

perfect,

 

and if i wanted to get the value of the data from a POST that i do not know the name to?

 

$data = $_POST ;

 

echo $data (this would echo out jimmyt1988) if the field that was sent contained this info.

 

EDIT:

 

Oh hangon, does that mean $_POST[0] will return the first post entry because $_POST is an array of values?

 

If so thats answered the question.

 

$_POST[0] will get me the data i need when i do not know the field name.

[marcus]

No, $_POST is an array of keys and values. So $_POST[0]; wouldn't return anything.

 

You could do something like:

 

if(count($_POST) > 0){
    $keys = array_keys($_POST);
    echo $_POST[$keys[0]];
}

[jimmyt1988]

Oh so close,

 

So array_keys can return the data of a field, is there a way to return the fieldname rather than the data.

 

i tried array_values but it didnt work hehe.

 

so the above statement returned jimmyt1988 but now i need to know what that data belonged to.. username, email etc

[jimmyt1988]

*bump* i'm still stuck with the same question above.

 

this:

 

if(count($_POST) > 0){

    $keys = array_keys($_POST);

    echo $_POST[$keys[0]];

}

 

returns the value of the field i dont know the name of.

How do i return the fieldname of the field i dont know the name of?

[marcus]

No, that returns the name of the field processing through. Here is my example:

 

<form method="post">
<input type="hidden" name="name1" value="cat1" />
<input type="hidden" name="name2" value="cat2" />
<input type="hidden" name="name3" value="cat3" />
<input type="submit" name="submit" />
</form>

<?php
if(count($_POST) > 0){
    $keys = array_keys($_POST);
    foreach($keys AS $field){
        echo $field . " has the value of " . $_POST[$field] . "<br />";
    }
}
?>

 

When I hit submit I get the following:

 

name1 has the value of cat1
name2 has the value of cat2
name3 has the value of cat3
submit has the value of Submit Query

[jimmyt1988]

HAHAHA, im so sorry.. THankyou!!!

 

Ah what a numb nut i am. Thanks a bunch, yehaa, working.