A Practical Step-by-Step Guide for PHP and MYSQL


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PHP AND MYSQL: AN INTRODUCTION

In my case I placed in the username xtian and password as It should display the inputs below. Here's my sample:.

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On this part, you should have understood on how to get input from the form. Now to add it to the database. On your register. Click here for the complete register. Try the inputs that you have made earlier and see what happens. It should prompt that you have successfully registered. Try going to phpmyadmin and see your users table:. Now for the login page.

Let's create a new file called checklogin. The reason is going back to our login. If you will notice on the register.

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Click here for the complete checklogin. Now try to test your input with a wrong username and password. It should return the desired prompt. After testing, try inputting the correct values. It should lead you to home. Now that were authenticated, let now create our home page home. Now that we have our home, let's try creating our logout. What we would do is that if the user is logged-out, the user shouldn't access home.

So here's the simple syntax to logout. The syntax is simple. Now try refreshing home. Now try Clicking on the back button of your browser and see what happens:.

Advantages of PHP over Other Languages

As you can see, it doesn't direct you to home. The same case should also happen. Since were logged-out, even a manual input of the address doesn't access an authorized page. What we have done is a simple security mechanism wherein we redirect back unauthorized users into a public page. In our next step, let's create the adding of item's to the list. Take note that this ain't our official add.

As you can see, we have our current time, date, and your input. Here's the explanation to the code:. Now let's modify our add. Click here for the complete add.


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Now try entering some data and click "Add to list". In my case, I'll just use fish again. Let's go to our phpmyadmin and let's see if the data has been added. Here's the result of my case:. Now that we have seen that the data has been successfully added. Let's now display the data in our home page. Let's modify our home. The explanation to the added code is quite simple.

It just basically displays the data coming from the while loop. It has been explained earlier in our tutorial so I believe that by this point, you should have understood the process of getting the data in the query. Going back to the browser, try refreshing your home. It should now display that data. Next is to update edit and delete information. If you will notice we have edit and delete links displayed on the column.

I'll add another data to the list named " tuna " to have another example and this time, it's privacy to no :. Let's now try editing our data and to do that we will use a new functionality called " GET ". To start of, let's modify our home. If you have noticed, we only added URL parameter for the edit and delete links namely id. We will be using this later to handle thee data. The reason why we use id is because it's a unique identifier. It is possible for the person to have enter the same data so it's not recommended to use the details as a mean for manipulation later on. Try putting your cursor into the edit link and you will see the value of the id onthe lower left:.

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Beginner PHP and MySQL Tutorial

Now that we have that, let's try creating our edit. Github Sourced. Github sourced. Let's try modifying the URL parameter by removing? Now try putting a value that is greater than the id number, in our case, let's try 5 and it should result like this:. Now that we secured our URL parameters, lets now place the edit syntax.

Create MySQL Database - MySQL Workbench Tutorial

Let's go back to edit. Click here for the complete edit. Now try refreshing and go back to the edit page. Let's try a different data. In my case, I'll be using "Salmon" and change it to non-public:. Go ahead and click Update list and you should be redirected to home.

Now, we have a time and date of edit displayed on the Edit Time column. Our privacy has been set now to non-public and the value has changed into Salmon. Looking back to the CRUD, we have now done creating adding , reading displaying , and updating editing records. Now for the last part, deleting records. For this part it's just relatively the same as what we have done on edit but what differs is just the SQL statement. In deleting records, we have to prompt people making sure that they'd really want to delete the record so we will be adding a little javascript in home.

To do that, let's modify our code and add some int home. Click here for the complete home. As you have noticed, we edited the link for the delete. We changed href into " " and added and onclick function for Javascript for the method of myFunction and inside it's parameter is the id of the row. If the user confirms, the page then directs to delete. Now let's create delete. Click here for the complete delete. The code is just simple and the syntax are also the ones that we used before but noticed we have changed our request method into GET.

This should be the result:.

MySQL - Free Courses and Tutorials

Now for the last part, displaying public data. Associative Arrays. Multi-Dimensional Arrays. Creating And Working With Arrays. Lesson Review. Hiding Sensitive Data. Including Sensitive Data. Formatting Using sprintf. Outputting Tabular Data. Outputting Data And Time. Introduction To Loops. Repetition - for Loops. Repetition - foreach Loops. MySQL Select. MySQL Joins. Intro To Sending Variables.

A Practical Step-by-Step Guide for PHP and MYSQL A Practical Step-by-Step Guide for PHP and MYSQL
A Practical Step-by-Step Guide for PHP and MYSQL A Practical Step-by-Step Guide for PHP and MYSQL
A Practical Step-by-Step Guide for PHP and MYSQL A Practical Step-by-Step Guide for PHP and MYSQL
A Practical Step-by-Step Guide for PHP and MYSQL A Practical Step-by-Step Guide for PHP and MYSQL
A Practical Step-by-Step Guide for PHP and MYSQL A Practical Step-by-Step Guide for PHP and MYSQL

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