PHP Windows require_once ignored - php

Question

My problem is,
This is the file that is being included ,
<?php
$dbhost = "localhost";
$dbuser = "****";
$dbpass = "***";
$dbname = "****";
$MYSQL_ERRNO = "";
$MYSQL_ERROR = "";
// Connect To Database
function db_connect() {
global $dbhost, $dbuser, $dbpass, $dbname;
global $MYSQL_ERRNO, $MYSQL_ERROR;
$link_id = mysql_connect($dbhost, $dbuser, $dbpass);
if(!$link_id) {
$MYSQL_ERRNO = 0;
$MYSQL_ERROR = "Connection failed to $dbhost.";
return 0;
}
else if(!mysql_select_db($dbname)) {
$MYSQL_ERRNO = mysql_errno();
$MYSQL_ERROR = mysql_error();
return 0;
}
else return $link_id;
}
?>
The main file has the following code to make db connection ,
<?php
require_once 'file.php';
$link_id = db_connect($dbname);
......
?>
But i got function undefined error.
Using Apache in Windows with PHP 5.3

Answer 1

1) Check relative paths for your includes.
2) Just because the PHP documentation says you can use require_once without parenthesis doesn't mean you should. Stay consistent, use require_once("file.php");.
3) Be consistent with curly braces in your function. You're missing one or two up there. I'd like to know if you rewrite your function the following way if it works:
function db_connect() {
global $dbhost, $dbuser, $dbpass, $dbname, $MYSQL_ERRNO, $MYSQL_ERROR;
$link_id = mysql_connect($dbhost, $dbuser, $dbpass);
if ($link_id === false) {
$MYSQL_ERRNO = 0;
$MYSQL_ERROR = "Connection failed to $dbhost.";
return 0;
} elseif (mysql_select_db($dbname) === false) {
$MYSQL_ERRNO = mysql_errno();
$MYSQL_ERROR = mysql_error();
return 0;
} else {
return $link_id;
}
}
And remember, checking your web server error logs usually helps.
Edit:
According to the comments for this answer, you're not including the file you think you are. Use an absolute path for the include so you're 100% sure of the file being included.

Answer 2

A logic.
Sometimes we need it.
Let's sort out your case.
you can see whatever "function undefined error." (Although I'd prefer literal and exact PHP error messages as they contain A LOT of useful information, let's assume it's regular PHP error thrown right in this place).
We can conclude from the (1) that you can see alll errors occurred.
So, from (2) we can tell the if there was a file not found error, you'd be notified of it.
So, we can assume from (3) that there is no error and file being included correctly.
What's next?
The most possible reason for you getting this error is the wrong code you posted here.
For example, if you include your file not as file.php but as http://example.com/file.php the result will be exactly as described.
Or there can be 2 files named 'file.php', one contains the function definition and another without it.
Or there can be a typo in the function's name as well.
So, you just have to double check your names and print some debugging info to be sure you are including the right file and calling the right function.