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.