Becoming a professional full stack web developer requires a solid understanding of the software tools most commonly used to create websites and mobile apps: This course teaches you about each of these tools, including their purpose, how they interact with the other tools, and detailed instruction on how to use them. Steve also covers the skill sets used in web development, such as image manipulation, page design, and database development.
You'll learn how modern websites really work, as well as gain hands-on experience using the tools and skill sets the professionals use to make those websites. Or, if you prefer, you can create a brand new website just for your CMS, and put all the files in that new website's document root folder. Inside the cms folder, create a file called config.
This exception handler is a bit of a quick and dirty shortcut to keep the tutorial as simple as possible. The "proper" way to handle exceptions is to wrap all the PDO calls within Article. In a live server environment it'd be a good idea to place config. While it's not usually possible to read the source code of a PHP script via the browser, it does happen sometimes if the web server is misconfigured. You could also use hash to make a hash from your admin password, and store the hash in config.
The feature list
Then, at login time, you can hash the entered password and see if it matches the hash in config. You're now ready to build the Article PHP class.
This is the only class in our CMS, and it handles the nitty-gritty of storing articles in the database, as well as retrieving articles from the database. Once we've built this class, it will be really easy for our other CMS scripts to create, update, retrieve and delete articles.
Inside your cms folder, create a classes folder. Inside that classes folder, create a new file called Article. This file is quite long, but it's fairly simple stuff when you break it down. Let's take a look at each section of the code:. First, we begin to define our Article class with the code: After starting our class definition, we declare the properties of the class: Each Article object that we create will store its article data in these properties.
You can see that the property names mirror the field names in our articles database table. Technically, this type of class — which contains properties that map directly to the corresponding database fields, as well as methods for storing and retrieving records from the database — follows an object-oriented design pattern known as active record.
Next we create the class methods. These are functions that are tied to the class, as well as to objects created from the class. Our main code can call these methods in order to manipulate the data in the Article objects. This is a special method that is called automatically by the PHP engine whenever a new Article object is created. We then populate those properties within the body of the constructor.
This gives us a handy way to create and populate an object in one go. You'll notice that the method filters the data before it stores them in the properties. The id and publicationDate properties are cast to integers using int , since these values should always be integers. The title and summary are filtered using a regular expression to only allow a certain range of characters. It's good security practice to filter data on input like this, only allowing acceptable values and characters through. We don't filter the content property, however. Well, the administrator will probably want to use a wide range of characters, as well as HTML markup, in the article content.
Security Principle and Practice. Our next method, storeFormValues , is similar to the constructor in that it stores a supplied array of data in the object's properties. The main difference is that storeFormValues can handle data in the format that is submitted via our New Article and Edit Article forms which we'll create later. The purpose of this method is simply to make it easy for our admin scripts to store the data submitted by the forms. All they have to do is call storeFormValues , passing in the array of form data. All of the members that is, the properties and methods of our Article class have the public keyword before their names, which means that they're available to code outside the class.
You can also create private members which can only be used by the class itself and protected members which can be used by the class and any of its subclasses. Don't worry, I'll be covering all this in a later tutorial! Now we come to the methods that actually access the MySQL database. Usually, when you call a method, you first create or retrieve an object, then call the method on that object. However, since this method returns a new Article object, it would be helpful if the method could be called directly by our calling code, and not via an existing object. Otherwise, we would have to create a new dummy object each time we wanted to call the method and retrieve an article.
To enable our method to be called without needing an object, we add the static keyword to the method definition. This allows the method to be called directly without specifying an object:. This makes a connection to the MySQL database using the login details from the config. This handle is used by the remaining code in the method to talk to the database. This is known as a placeholder. Prepared statements are a feature of most databases; they allow your database calls to be faster and more secure.
We pass in the placeholder name; the value to bind to it; and the value's data type integer in this case so that PDO knows how to correctly escape the value. It's a good idea to close database connections as soon as possible to free up memory on the server. The last thing our method needs to do is create a new Article object that stores the record returned from the database, and return this object to the calling code. We then return this new object, and our work here is done. Our next method, getList , is similar in many ways to getById.
The main difference, as you might imagine, is that it can retrieve many articles at once, rather than just 1 article. It's used whenever we need to display a list of articles to the user or administrator. Much of this method's code is similar to getById. Let's look at a few lines of interest:. Our query is a bit more complex than last time.
First, notice that there's no WHERE clause this time; this is because we want to retrieve all articles, rather than an article that matches a specific ID.
- getting back in the dating scene after divorce!
- private dating place in dhanmondi.
- Making a Super Simple Registration System With PHP and MySQL;
- dating spots in toronto.
When there are no more rows, fetch returns false and the loop exits. This time we use the PDO query method, which lets us quickly run a query if there are no placeholders to bind. The remaining methods in our Article class deal with adding, changing and deleting article records in the database. Notice that we use PDO:: This is so that PDO can escape the values appropriately. This method is similar to insert , except that it updates an existing article record in the database instead of creating a new record.
First it checks that the object has an ID, since you can't update a record without knowing its ID. The delete method is pretty self-explanatory. For safety reasons, we add LIMIT 1 to the query to make sure that only 1 article record can be deleted at a time. We've now created our Article class, which does the heavy lifting for our CMS.
Now that's out of the way, the rest of the code is pretty simple! First, let's create index. Save this file in the cms folder you created earlier, at the start of Step It's good programming practice to check that user-supplied values, such as query string parameters, form post values and cookies, actually exist before attempting to use them. Not only does it limit security holes, but it prevents the PHP engine raising "undefined index" notices as your script runs.
Making a Super Simple Registration System With PHP and MySQL - Tutorialzine
Notice that we use int to cast the value of the articleID query parameter to an integer. This is a good security measure, as it prevents anything other than integers from being passed to our code. Our admin script is a bit more complex than index. Second, adding a joke to your web site would be a simple matter of inserting the joke into the database. The PHP code would take care of the rest, automatically displaying the new joke along with the others when it fetched the list from the database. A database is composed of one or more tables, each of which contains a list of items, or things.
Each table in a database has one or more columns, or fields. Each column holds a certain piece of information about each item in the table. In our example, our joke table might have one column for the text of the jokes, and another for the dates on which the jokes were added to the database. Each joke stored in this way would then be said to be a row or entry in the table. These rows and columns form a table that looks like the figure below.
As a matter of good design, a database table should always provide a means by which we can identify each of its rows uniquely. The function of the id column, therefore, is to assign a unique number to each joke so that we have an easy way to refer to them and to keep track of which joke is which. So, to review, the table above is a three-column table with two rows, or entries.
Each row in the table contains three fields, one for each column in the table: Just as a web server is designed to respond to requests from a client a web browser , the MySQL database server responds to requests from client programs.
Build a CMS in an Afternoon with PHP and MySQL
If you followed the instructions in Chapter 1, Installation, after setting up a MySQL server of your own, you used the mysqladmin client program to connect to the server, establish a password for the root user, and view basic statistics about the running server. Another client program that comes with the MySQL server is called mysql. This program provides the most basic interface for working with a MySQL server, by establishing a connection to the server and then typing commands one at a time. The mysql program can be found in the same place as mysqladmin, so if you followed the instructions in Chapter 1: If instead you receive an error message complaining that your computer is unable to recognize the mysql command, you should probably revisit the installation instructions provided in Chapter 1: Assuming the mysql program is running for you, you can now use it to connect to your MySQL server.
First, make sure that server is running, then type this command and hit Enter:. The -u root and -p parameters perform the same function for this program as they did for mysqladmin in Chapter 1: What you should see next is an Enter password: Enter the root password you chose for yourself in Chapter 1, and hit Enter.
Welcome to the MySQL monitor. Commands end with ; or g. The MySQL server can actually keep track of more than one database. This allows a web host to set up a single MySQL server for use by several of its subscribers, for example. So, your first step after connecting to the server should be to choose a database with which to work.
You just have to add an additional parameter when running it: The -h hostname parameter where hostname is the host name of the MySQL server to which you want to connect tells the program to connect to a remote MySQL server instead of one running on the same computer. In practice, most remote MySQL servers will block connections from client programs running on untrusted computers like yours.
Disallowing this type of connection is a common security measure for MySQL servers used in production. To work with a remote MySQL server, you might be able to connect to a trusted computer and run the mysql program from there, but a far more common approach is to use a program called phpMyAdmin to manage your remote databases. Type this command including the semicolon! MySQL will show you a list of the databases on the server.
The second database, mysql, is special too. The third database, named test, is a sample database.