I am having a problem with my index.php. Whenever I go to http://localhost/blog/admin/index.php I get an error:
Fatal error: Call to undefined function Blog\DB\connect() in C:\xampp\htdocs\blog\blog.php on line 6.
In the admin folder all I am requiring is my blog.php which is working fine in other files when I required them. I am stuck with this and can not understand why this is happening.
index.php in admin folder
My admin/index.php:
<?php
require '../blog.php';
My blog.php. It is requiring the db.php in which we have called the connect function.
<?php
require 'db.php';
$conn = \App\DB\connect($config);
if(!$conn)
die('Could not connect to db');
My db.php. It is just trying to establish a connection:
<?php namespace App\DB;
require 'config.php';
function connect($config)
{
try
{
$conn = new \PDO("mysql:host=localhost;dbname=blogs",
$config['DB_USERNAME'],
$config['DB_PASSWORD']);
$conn->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
return $conn;
}
catch(PDOException $e)
{
return false;
}
}
Related
I am having an issue with an include file accessing another include file (my db connection)
I have a site with the following layout ::
root/conn.php :: db connection file
root/site/file1.php :: regular page
root/site/include/func.inc :: file with functions in it
Each file is listed below with appropriate code...
conn.php ::
<?php
$host = 'localhost';
$db = 'mydb';
$user = 'myuser';
$pass = 'mypass';
$charset = 'utf8mb4';
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
try {
$conn = new mysqli($host, $user, $pass, $db);
$conn->set_charset($charset);
} catch (\mysqli_sql_exception $e) {
throw new \mysqli_sql_exception($e->getMessage(), $e->getCode());
}
unset($host, $db, $user, $pass, $charset);
?>
file1.php ::
include_once ("{$_SERVER['DOCUMENT_ROOT']}/conn.php");
include_once ("{$_SERVER['DOCUMENT_ROOT']}/site/include/func.inc");
{ code that calls functions in func.php }
func.inc ::
include_once ("{$_SERVER['DOCUMENT_ROOT']}/conn.php");
{ various functions }
When I browse to /file1.php, I get the following error ::
PHP Notice: Undefined variable: conn in C:\inetpub\root\site\include\func.inc on line 231
PHP Fatal error: Uncaught Error: Call to a member function prepare() on null in C:\inetpub\root\site\include\func.inc:231
my func.inc file cannot seem to find the conn.php file. I have also tried removing the include function from func.inc. There are other files in the /include folder that can access the conn.php file with the same include function.
The issue relates to something called the variable scope (https://www.php.net/manual/en/language.variables.scope.php)
==> Please read that to get detailed information
The second example describes your problem
func.inc
<?php
include_once ("{$_SERVER['DOCUMENT_ROOT']}/conn.php");
// to illustrate the issue, the include can be simplified to
// $conn = "something"; // => global scope variable
function myFunc(){
echo $conn; //no output - $conn exists ONLY in the local scope --> not available inside thisfunction
}
Solution 1:
func.inc
<?php
function myFunc($conn){
echo $conn; //outputs $conn
}
file1.php
<?php
include_once ("{$_SERVER['DOCUMENT_ROOT']}/conn.php");
include_once ("{$_SERVER['DOCUMENT_ROOT']}/site/include/func.inc");
//call function and pass the $conn, it's available here in the global scope
myFunc($conn);
Solution 2
but keep in mind global is considered as bad practice
func.inc
<?php
include_once ("{$_SERVER['DOCUMENT_ROOT']}/conn.php");
function myFunc(){
global $conn; //$conn is declared global in the local scope of this function
echo $conn; //outputs $conn from conn.php if you call myFunc from anywhere
}
I have a project folder name utilities.
The list of directory is:
- utilities
- tli
- database
Connection.php
index.php
The Connection.php is PDOConnection.
The code is:
<?php
namespace app\tli\database;
use PDO;
use PDOException;
Class Connection
{
private $server = "mysql:host=localhost;dbname=ytsurumaru_hanwa_coil_v.2";
private $user = "root";
private $pass = "";
private $options = array(PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,);
protected $con;
public function openConnection()
{
try {
$this->con = new PDO($this->server, $this->user, $this->pass, $this->options);
return $this->con;
} catch (PDOException $e) {
return "There is some problem in connection: " . $e->getMessage();
}
}
public function closeConnection()
{
$this->con = null;
}
}
UPDATED SOURCE
Now, I need this Connection instance in index.php
<?php
namespace app;
use app\tli\database\Connection;
use PDOException as PDOEx;
require('tli/database/Connection.php');
try {
$connection = new Connection(); // not found
$connection->openConnection();
} catch (PDOEx $e) {
echo $e->getMessage();
}
When I run it,
D:\wamp64\www\utilities\tli>php index.php
Warning: require(tli/database/Connection.php): failed to open stream: No such file or directory in D:\wamp64\www\utilities\tli\index.php on line 8
Fatal error: require(): Failed opening required 'tli/database/Connection.php' (include_path='.;C:\php\pear') in D:\wamp64\www\utilities\tli\index.php on line 8
How to solved this, is my namepace have a problem ?
Isn't this enough to access your database connection?
require 'tli/database/Connection.php';
Then, since you are in a different name space and you are not aliasing, in your 'try catch block' you should instead of:
$connection = new Connection(); // not found
Do something like:
$connection = new \tli\database\Connection();
Make sure to set your paths right.
OR
You can alias to a different name like so:
namespace app;
require 'tli/database/Connection.php';
use tli\database\Connection as MyConnection;
$connection = new MyConnection();
You need to use one of these:
include('tli/database/Connection.php')
include_once('tli/database/Connection.php')
require('tli/database/Connection.php')
require_once('tli/database/Connection.php')
or if you want some more automation use autoloader.
You may want to look at this SO question and all the linked things.
I have function.php
function functionname() {
include_once ("connection.php");
// Do Something
return $variable
}
And a connection.php that goes as follows
<?php
try{
$db = new PDO ('mysql:host=localhost;dbname=project', 'root', '');
}
catch (PDOException $ex){
echo "Error!:" . $ex -> getMessage() . " Cannot Connect";
}
?>
I've been trying to run a php function but it's can't detect the MySql connection. If I try making include_once into just include inside the function.php the error becomes too many connection.
The connection works except when use inside a function. I've been trying to run the function.php into a seperate thirdPHPpage.php through the following code
include_once ("connection.php");
include_once ("functions.php");
$string = functionname();
echo $string;
https://plnkr.co/edit/ZNlAyky7TzT4jknpnoDJ?p=preview
here is a link to a plnkr with all my code written so far. I keep getting an
Fatal error: Cannot redeclare connect_to_db() (previously declared in
/var/www/html/News/config/dbconnect.php:5) in
/var/www/html/News/config/dbconnect.php on line 5
the plunkr wont have the folder structure because i could not figure out how to add folders however here is my code for dbconnect.php
<?php
$pdo = null;
function connect_to_db()
{
$dbengine = 'mysql';
$dbhost = 'localhost';
$dbuser = 'root';
$dbpassword = 'password';
$dbname = 'news';
try{
$pdo = new PDO("".$dbengine.":host=$dbhost; dbname=$dbname", $dbuser,$dbpassword);
$pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
return $pdo;
}
catch (PDOException $e){
$e->getMessage();
}
}
line 5 does not have a call to db connect so i dont know what is going on
You are using
require __DIR__.'/dbconnect.php'
In both your Index.php and your functions.php, while requiring your functions.php in Index.php.
Therefore connect_to_db() is being defined twice. Use require_once instead to prevent this:
require_once __DIR__.'/dbconnect.php'
http://php.net/manual/en/function.require-once.php
new to PHP. Using the SLIM framework and the routing has been tested and is working fine. Have two files index.php and API.php. index.php is:
<?php
require 'vendor/autoload.php';
require_once 'API.php';
//Turn on error checking
ini_set('display_errors',1);
ini_set('display_startup_errors',1);
error_reporting(-1);
//Create a new SLIM app
$app = new \Slim\Slim();
$app->response->headers->set('Content-Type', 'application/json');
$app->get('/', function() use($app) {
$app->response->setStatus(200);
echo "InstaAPI\n";
});
$app->run();
?>
API is:
<?php
class DbHandler{
protected static $conn;
function __construct() {
//Static self notation is different
if(!isset(self::$conn)) {
//same as self.connect
$this->connect();
}
}
function __destruct(){
if(isset(self::$conn)){
self::$conn->close();
}
}
function connect(){
$config = parse_ini_file('../../config2.ini');
// Try and connect to the database
self::$conn = mysqli_connect('localhost',$config['username'],$config['password'],$config['dbname']);
if(self::$conn===FALSE) {
header("HTTP/1.1 500 Internal Server Error");
header("Content-Type: application/json");
$response = array("Response"=>"Failed to connect to the database");
echo json_encode($response);
die();
}
else{
echo "Fine!!";
}
}//end connect
}//end class
?>
I am getting the error: PHP Fatal error: Cannot redeclare class DbHandler in ../API.php on line 62. Not sure why this is happening. I am using require_once and still getting the same error. Could someone give me some pointers to what I might be doing wrong please?
the code of Api.php is less than 62 lines. looks like there is extra code below it. consider deleting extra lines