add various comments to functions.php
This commit is contained in:
Andreas Zweili
parent
bc10532894
commit
02bfff2f4c
|
|
@ -1,13 +1,16 @@
|
|||
<?php
|
||||
//load the database functions
|
||||
require('db.php');
|
||||
// the function which varifies a users credentials
|
||||
// against the database
|
||||
|
||||
/* the function which verifies a user's credentials
|
||||
against the database */
|
||||
function login ()
|
||||
{
|
||||
session_start();
|
||||
if (isset($_REQUEST['username'])) {
|
||||
//Checking if the user exists in the database or not
|
||||
global $con;
|
||||
|
||||
/* assign the variables with data from the login form */
|
||||
$username = stripslashes($_REQUEST['username']);
|
||||
//escapes special characters in a string
|
||||
$username = mysqli_real_escape_string($con,$username);
|
||||
|
|
@ -15,9 +18,14 @@ function login ()
|
|||
$current_user = $username;
|
||||
$password = stripslashes($_REQUEST['password']);
|
||||
$password = mysqli_real_escape_string($con,$password);
|
||||
|
||||
//check the form data against the database
|
||||
$query = "SELECT * FROM users WHERE userLogin='$username'
|
||||
and userPass='$password'";
|
||||
$result = mysqli_query($con,$query) or die(mysqli_error());
|
||||
|
||||
/* forward the user to the home.php page if the login is correct
|
||||
otherwise prompt an error message*/
|
||||
$rows = mysqli_num_rows($result);
|
||||
if ($rows==1) {
|
||||
$_SESSION['username'] = $username;
|
||||
|
|
@ -34,6 +42,8 @@ function register ()
|
|||
{
|
||||
if (isset($_REQUEST['username'])) {
|
||||
global $con;
|
||||
|
||||
/* assign the variables with data from the login form */
|
||||
// removes backslashes
|
||||
$username = stripslashes($_REQUEST['username']);
|
||||
//escapes special characters in a string
|
||||
|
|
@ -42,10 +52,15 @@ function register ()
|
|||
$email = mysqli_real_escape_string($con,$email);
|
||||
$password = stripslashes($_REQUEST['password']);
|
||||
$password = mysqli_real_escape_string($con,$password);
|
||||
|
||||
/* create a new user entry inside the database */
|
||||
$query = "INSERT into users (userLogin, userPass, userEmail)
|
||||
VALUES ('$username', '$password', '$email')";
|
||||
$result = mysqli_query($con,$query);
|
||||
// checks if the username or email addresse is already taken
|
||||
|
||||
/* tell the user if the username or the email address are
|
||||
already present in the database based on the return code
|
||||
of the database*/
|
||||
if ($result) {
|
||||
echo "<div class='form'>
|
||||
<h3>You are registered successfully.</h3>
|
||||
|
|
@ -56,7 +71,8 @@ function register ()
|
|||
}
|
||||
}
|
||||
|
||||
//A function to read out the userId of the current user
|
||||
/*A function to get the userId from the database for the current
|
||||
logged in user based on the username used to login*/
|
||||
function get_userid ()
|
||||
{
|
||||
global $con;
|
||||
|
|
@ -74,13 +90,17 @@ function post_demand ()
|
|||
if (isset($_POST['submit'])) {
|
||||
global $con;
|
||||
$userId = get_userid();
|
||||
|
||||
/* assign the variables with data from the demand form */
|
||||
$piecesMax = $_POST['piecesMax'];
|
||||
$piecesMin = $_POST['piecesMin'];
|
||||
$qualityId = $_POST['quality'];
|
||||
$deliveryDate = $_POST['deliveryDate'];
|
||||
$title = $_POST['title'];
|
||||
$text = $_POST['text'];
|
||||
// Inserts Data into Database
|
||||
|
||||
/* check if the values make sense before adding them to
|
||||
the databse */
|
||||
if ($piecesMax <= $piecesMin) {
|
||||
echo "<strong class='warning'>
|
||||
The Maximum must be bigger than the Minimum!
|
||||
|
|
@ -96,28 +116,38 @@ function post_demand ()
|
|||
}
|
||||
}
|
||||
|
||||
// A function to insert the own posts from the database into the website
|
||||
// A function to insert the demand titles from the database into the website
|
||||
function get_demand_titles ()
|
||||
{
|
||||
global $con;
|
||||
|
||||
//get the data from the database
|
||||
$sql = "SELECT * FROM demands";
|
||||
$result = mysqli_query($con, $sql);
|
||||
|
||||
/*fetch the data from the $result array and insert it into
|
||||
the corresponding HTML code */
|
||||
while ($row = $result->fetch_assoc()) {
|
||||
echo "<div class='post-box'><p>";
|
||||
echo "<strong>" . $row['demandTitle'] . "</strong></a>" . "<br>";
|
||||
echo $row['date'] . "<br>";
|
||||
|
||||
//add a delete button to the demand output
|
||||
echo "<form class= 'delete-form' method= 'POST'
|
||||
action='".delete_demand()."'>
|
||||
<input type='hidden' name='demandId' value='".$row['demandId']."'>
|
||||
<button type='submit' name= 'deletepost'> Delete</button>
|
||||
</form>";
|
||||
|
||||
/*add a button to the demand output which let's the user view
|
||||
the demand details */
|
||||
echo "<form method= 'POST' action='show_demand.php'>
|
||||
<input type='hidden' name='demandId' value='".$row['demandId']."'>
|
||||
<button>Show Details</button>
|
||||
</form>";
|
||||
|
||||
/* add an edit button to the demand output and give it the
|
||||
necessary data to edit. */
|
||||
echo "<form class= 'edit-form' method= 'POST' action='edit_demand.php'>
|
||||
<input type='hidden' name='userId' value='".$row['userId']."'>
|
||||
<input type='hidden' name='demandId' value='".$row['demandId']."'>
|
||||
|
|
@ -138,6 +168,8 @@ function edit_demand ()
|
|||
{
|
||||
if (isset($_POST['edit'])) {
|
||||
global $con;
|
||||
|
||||
/* assign the variables with data from the edit button */
|
||||
$demandId = $_POST['demandId'];
|
||||
$piecesMax = $_POST['piecesMax'];
|
||||
$piecesMin = $_POST['piecesMin'];
|
||||
|
|
@ -145,7 +177,8 @@ function edit_demand ()
|
|||
$title = $_POST['title'];
|
||||
$text = $_POST['text'];
|
||||
|
||||
// Inserts Updates Database
|
||||
/* Inserts the updates into the database if the values
|
||||
make sense otherwise inform the user about his error*/
|
||||
if ($piecesMax <= $piecesMin) {
|
||||
echo "<strong class='warning'>
|
||||
The Maximum must be bigger than the Minimum!
|
||||
|
|
@ -163,36 +196,45 @@ function edit_demand ()
|
|||
}
|
||||
}
|
||||
}
|
||||
|
||||
// A function to delete a post
|
||||
function delete_demand()
|
||||
{
|
||||
if (isset($_POST['deletepost'])) {
|
||||
global $con;
|
||||
|
||||
/* assign the variable with data from the delete button */
|
||||
$demandId = $_POST['demandId'];
|
||||
|
||||
// Delete Post from Database
|
||||
// Delete the demand matching the demandId from the database
|
||||
$sql = "DELETE FROM demands WHERE demandId='$demandId'";
|
||||
$result = mysqli_query($con, $sql) or die(mysqli_error($con));
|
||||
header('Location: board.php');
|
||||
}
|
||||
}
|
||||
|
||||
//a function to show a demand's details
|
||||
function show_demand ()
|
||||
{
|
||||
global $con;
|
||||
|
||||
/* assign the variable with data from the details button */
|
||||
$demandId = $_POST['demandId'];
|
||||
|
||||
//get the corresponding data from the database
|
||||
$demand_query = "SELECT * FROM demands where demandId='$demandId'";
|
||||
$demand_query_result = mysqli_query($con, $demand_query) or
|
||||
die(mysqli_error($con));
|
||||
$demand_rows = $demand_query_result->fetch_object();
|
||||
|
||||
//get the quality requested in the demand from the database
|
||||
$qualityId = $demand_rows->qualityId;
|
||||
$quality_query = "SELECT * FROM quality where qualityId='$qualityId'";
|
||||
$quality_query_result = mysqli_query($con, $quality_query) or
|
||||
die(mysqli_error($con));
|
||||
$quality_rows = $quality_query_result->fetch_object();
|
||||
|
||||
//print the demand details
|
||||
echo "<h2>" . $demand_rows->demandTitle . "</h2>";
|
||||
echo "<br>
|
||||
<br>";
|
||||
|
|
@ -210,24 +252,32 @@ function show_demand ()
|
|||
<br>
|
||||
<strong>Description:</strong><br>";
|
||||
echo "$demand_rows->demandText<br><br>";
|
||||
|
||||
/*add a "Post Offer" button to the demand's details to let a user
|
||||
post an offer */
|
||||
echo "<form method= 'POST' action='add_offer.php'>
|
||||
<input type='hidden' name='demandId' value='$demand_rows->demandId'>
|
||||
<button>Post Offer</button>
|
||||
</form><br>";
|
||||
|
||||
}
|
||||
|
||||
//A function to post an offer to a demand
|
||||
function post_offer()
|
||||
{
|
||||
if (isset($_POST['submit'])) {
|
||||
global $con;
|
||||
|
||||
//get the current user's ID
|
||||
$userId = get_userid();
|
||||
|
||||
/* assign the variables with data from the "Post Offer" form*/
|
||||
$demandId = $_POST['demandId'];
|
||||
$pieces = $_POST['pieces'];
|
||||
$price = $_POST['price'];
|
||||
$qualityId = $_POST['quality'];
|
||||
$text = $_POST['text'];
|
||||
// Inserts Data into Database
|
||||
|
||||
// Insert the offer into the database
|
||||
$sql = "INSERT INTO offers (pieces, text, price, userId, qualityId,
|
||||
demandId)
|
||||
VALUES ('$pieces', '$text', '$price', '$userId', '$qualityId',
|
||||
|
|
@ -236,9 +286,12 @@ function post_offer()
|
|||
}
|
||||
}
|
||||
|
||||
//A function to print out the offers to a demand
|
||||
function show_offer ()
|
||||
{
|
||||
global $con;
|
||||
|
||||
/* assign the variables with data from demand*/
|
||||
$demandId = $_POST['demandId'];
|
||||
|
||||
// get the offers matching the demand from the database
|
||||
|
|
@ -248,6 +301,8 @@ function show_offer ()
|
|||
|
||||
// if the query on the database returned data print the data
|
||||
while ($offer_rows = $offer_query_result->fetch_object()) {
|
||||
|
||||
//get the corresponding quality data from the database
|
||||
$qualityId = $offer_rows->qualityId;
|
||||
$quality_query = "SELECT * FROM quality where qualityId='$qualityId'";
|
||||
$quality_query_result = mysqli_query($con, $quality_query) or
|
||||
|
|
@ -268,6 +323,8 @@ function show_offer ()
|
|||
<br>
|
||||
<strong>Description:</strong><br>";
|
||||
echo $offer_rows->text . "<br><br>";
|
||||
|
||||
/*Add a button to each offer which let's the user export the offer*/
|
||||
echo "<form method= 'POST' action='export_offer.php'>
|
||||
<input type='hidden' name='offerId' value='$offer_rows->offerId'>
|
||||
<button>Export this Offer</button>
|
||||
|
|
@ -275,11 +332,15 @@ function show_offer ()
|
|||
}
|
||||
}
|
||||
|
||||
//A function which exports an offer to XML
|
||||
function export_offer ()
|
||||
{
|
||||
global $con;
|
||||
|
||||
/* assign the variable with data from "Export Offer" button*/
|
||||
$offerId = $_POST['offerId'];
|
||||
|
||||
/*get the offer and all it's related the data from the database*/
|
||||
$offer_export_query = "SELECT o.offerId,
|
||||
o.text,
|
||||
o.price,
|
||||
|
|
@ -295,17 +356,17 @@ function export_offer ()
|
|||
WHERE o.offerId = '$offerId';";
|
||||
$query_result = mysqli_query($con, $offer_export_query) or
|
||||
die(mysqli_error($con));
|
||||
|
||||
$export_rows = $query_result->fetch_object();
|
||||
|
||||
//create a dom document with encoding utf8
|
||||
$domtree = new DOMDocument('1.0', 'UTF-8');
|
||||
|
||||
// create the root element of the xml tree
|
||||
/* create the root element of the xml tree and append it to
|
||||
the dom document*/
|
||||
$xmlRoot = $domtree->createElement("offer");
|
||||
// append it to the document created
|
||||
$offer_export = $domtree->appendChild($xmlRoot);
|
||||
|
||||
//add the offer fields as child elements to the XML
|
||||
$offer_export->appendChild(
|
||||
$domtree->createElement('demand_title',$export_rows->demandTitle));
|
||||
$offer_export->appendChild(
|
||||
|
|
@ -321,7 +382,9 @@ function export_offer ()
|
|||
$offer_export->appendChild(
|
||||
$domtree->createElement('offer_date',$export_rows->date));
|
||||
|
||||
/* get the xml printed */
|
||||
// format the dom document
|
||||
$offer_export->formatOutput = true;
|
||||
// print out the generate dom document
|
||||
echo $domtree->saveXML();
|
||||
}
|
||||
?>
|
||||
|
|
|
|||
Loading…
Reference in New Issue