An require_once in another require_once - some functions work, others don't - PHP

Question

This is a tricky one to explain. So I'll bullet point it:

I have a file that require_once all my settings files and classes ...I call it start.php
I require_once that file in my index.php
My index.php file then I require_once a another file called home.php

This scripts works perfectly on my localhost server. Now my issue presents itself when I try it on my online server and some functions seem to be working while others are not and I get this error:

Fatal error: Call to undefined function update_display() in /xxxxx/home.php on line 146

Now I know "Fatale error" is because I require_once, but what I don't understand is why some functions seem to be working while others do not?
Also worth mentioning that if I do require_once in my home.php file, it says that I am declaring the function twice!

Any help, much appreciated.

@Pekka - I'm just using relative paths ie functions/start.php — denislexic
– denislexic, Commented Oct 4, 2011 at 18:59
most likely the wrong files are getting included, so try using abs paths (convert relative path to absolute by prepending dirname(__FILE__) . to it (note: dot is for concatenation with the relative path that follows in the code) — Maxim Krizhanovsky
– Maxim Krizhanovsky, Commented Oct 4, 2011 at 19:15

dmitry · Accepted Answer · 2011-10-04 19:10:53Z

You may use such useful functions as get_included_files and get_include_path to diagnose a problem. Just print their result somewhere (for instance in /xxxxx/home.php just before update_display call). Also you can list defined functions using get_defined_functions(). This will help you to clear up what's actually loaded.

Thanks for that. After using the get_included_files, for some strange reason one the files that I included, was not gotten from the same file as all the others. Anyway, it helped me find the error, so thank you a lot!

user652649 · Accepted Answer · 2011-10-04 18:59:51Z

0

have you tried to convert php starting tags from:

<?

to:

<?php

? HTH

answered Oct 4, 2011 at 18:59

user652649

2 Comments

denislexic Over a year ago

Thanks for the input, but I always use <?php ?>

user652649 Over a year ago

in your webhost's ftp you may have a file called error_log or something, read if there is some error at end of the file

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