PHP function cannot be called

Question

I will try to explain my problem in a simple way. My code looks like these.

A web page, systemView.php, has following code

<?php require_once 'Common_Function.php'; ?>
<head>
    <script src="jF.js"></script>
</head>
<html>
     <div id="one"> <?php A(); ?> </div>
     <div id="two">  </div>
</html>

Common_Function.php is

<?php
    include 'systemView_Function.php';
    include 'database.php';
?>

systemView.php has A() as well as B()

<?php
    function A() {
        D(); // a function in database.php
        //and show a few button on the page
    }
    function B($number) {
        D(); // a function in database.php
        //some codes to show something in the page
    }
    if (isset($_POST['B'])) { 
        B($_POST['B']); 
    }
?>

A() function will show some buttons on the page when called. When one of the buttons is clicked. javascript will then call B() by ajax. This function in js is

$(".abutton").click(function(){
    $("#two").empty();
    var number = parseInt($(this).text());
    $.ajax({
        url: "./systemView_Function.php",
        type: "POST",
        data: {"B": number},
        dataType: "JSON",
        success: function(data) {   
            $("#two").append(data);
        }
    });
})

Now the problem is when D() is not included in B(), the codes run successfully and shows something in id="two" div. However, if D() is included in B(), console in browser shows errors, and nothing in second div.

@TZHX Chrome shows POST http://localhost:8888/systemView_Function.php 500 (Internal Server Error) — Jimmy
– Jimmy, Commented Jan 31, 2015 at 8:34

TZHX · Accepted Answer · 2015-01-31 08:37:11Z

1

My guess is that, because you don't reference database.php in your systemView.php page, PHP cannot find the D() function and so throws an error.

A() runs because it is called from a page that has it in scope (from CommonFunctions.php), but when B() is called -- being a new request -- it doesn't know what to look for.

answered Jan 31, 2015 at 8:37

TZHX

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2 Comments

Jimmy Over a year ago

i include 'database.php' in B() now, and it works. Thank you!

TZHX Over a year ago

Glad I could be of some assistance. :)

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