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Web Development Using PHP And MySQL

PHP (or PHP Hypertext Preprocessor) is a server-side scripting language that is used to create dynamic web pages that can interact with databases. It is a widely-used open source language that is specifically used for web application development and can be embedded within HTML. Why PHP? The distinguishing feature of PHP is that the scripting code is executed on the server, which generates HTML that is sent back to the client. The client receives the result of executing the script without knowing the underlying code. Developers can configure the web server to process all the HTML files (containing the PHP script). PHP course is easy to learn for any newcomer, but also offers advanced programming features. Using PHP with a database system PHP, as a scripting language, is popular among web developers because of its ability to interact with database systems including Oracle and MySQL. This article discusses the use of PHP scripting language with the MySQL database. Any website can require a variety of data or information to display and to retrieve them from the database. This can include display of a simple list to the running of the website based on data stored in the database. Listed below are some examples where PHP and MySQL can be used together: • Digital Ad banners, where the PHP script can be used to retrieve a digital banner from the database, which then selects a random banner from its table records and sends it back to the calling script. The PHP script can also maintain a count of banner views and clicks from the website. • Internet forums or digital boards, which use PHP and MySQL to store and retrieve user messages. • Website designing, where the design of an entire website can be changed using a couple of PHP scripts, instead of changing and uploading each web page. The PHP script can access the MySQL database to retrieve all information about the web page. Setting up the MySQL database The procedure of setting up the MySQL database varies according to the host. Every database would require a user name and password, in order to access the database. Database administration can be done using PHP scripts or using a program like PHPMyAdmin. The next step is to create the database tables for storing the website information. Creating a database table using PHPMyAdmin is also simple. Alternatively, one can create and configure the entire database using the following PHP script: CREATE TABLE tablename { Fields } Where the Fields are coded as fieldname type(length) extra_info Example: first varchar(15) NOT NULL The following command is used in the PHP script to connect to the MySQL database: mysql_connect(localhost,$username,$password); where: • localhost is the server address on which the web site is running, • $username is the user name for the database access • $password is the password for the database access Executing PHP commands After configuring and connecting to the MySQL database, you can start executing PHP commands on the server. Following are the 2 methods of executing a PHP command: • Entering the command in PHP using the following syntax: Mysql_query($query) This form of command can be used to repeat the command simply by changing the variable. • Defining the command as a variable. The result of the operation will be assigned to the variable. Data input and output Inserting data using PHP is identical to the procedure of data input using HTML pages. The advantage of using PHP is that the script does not need to be changed for each new piece of input data. Users can also input their own data on the web page. Following is an example of an HTML page with textboxes that can be used to enter data in a form: Alternatively, you can use variables to input information into the database. Example: $first=$_POST[‘first’]; $last=$_POST[‘last’]; $phone=$_POST[‘phone’]; $mobile=$_POST[‘mobile’]; $fax=$_POST[‘fax’]; $email=$_POST[’email’]; $web=$_POST[‘web’]; … $query = “INSERT INTO contacts VALUES (”,’$first’,’$last’,’$phone’,’$mobile’,’$fax’,’$email’,’$web’)”; mysql_query($query); This script is saved in the insert.php file, which can be called from the HTML form. Using this method, data entered in the web page form is stored in the defined variables, which are then passed to the PHP. To display (or output) the entered data using PHP, you can use the following MySQL command with the result assigned to the variable. $query=”SELECT * FROM contacts”; $result=mysql_query($query); PHP provides 2 submission methods, GET and POST to get the data submitted by the form into your PHP script. GET method displays the variables and the data in the page address, while they are invisible in the POST method. For example, a script can be created that will display different web pages depending on the clicked link. yourpage.php?user=david (to show David’s page) yourpage.php?user=tom (to show Tom’s page)
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Web Development Using PHP And MySQL

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Web Development Using PHP And MySQL

PHP (or PHP Hypertext Preprocessor) is a server-side scripting language that is used to create dynamic web pages that can interact with databases. It is a widely-used open source language that is specifically used for web application development and can be embedded within HTML.

Why PHP?

The distinguishing feature of PHP is that the scripting code is executed on the server, which generates HTML that is sent back to the client. The client receives the result of executing the script without knowing the underlying code. Developers can configure the web server to process all the HTML files (containing the PHP script).

PHP course is easy to learn for any newcomer, but also offers advanced programming features.

Using PHP with a database system

PHP, as a scripting language, is popular among web developers because of its ability to interact with database systems including Oracle and MySQL.

This article discusses the use of PHP scripting language with the MySQL database. Any website can require a variety of data or information to display and to retrieve them from the database. This can include display of a simple list to the running of the website based on data stored in the database.

Listed below are some examples where PHP and MySQL can be used together:

• Digital Ad banners, where the PHP script can be used to retrieve a digital banner from the database, which then selects a random banner from its table records and sends it back to the calling script. The PHP script can also maintain a count of banner views and clicks from the website.

• Internet forums or digital boards, which use PHP and MySQL to store and retrieve user messages.

• Website designing, where the design of an entire website can be changed using a couple of PHP scripts, instead of changing and uploading each web page. The PHP script can access the MySQL database to retrieve all information about the web page.

Setting up the MySQL database

The procedure of setting up the MySQL database varies according to the host. Every database would require a user name and password, in order to access the database.

Database administration can be done using PHP scripts or using a program like PHPMyAdmin.

The next step is to create the database tables for storing the website information. Creating a database table using PHPMyAdmin is also simple. Alternatively, one can create and configure the entire database using the following PHP script:

CREATE TABLE tablename {

Fields

}
Where the Fields are coded as fieldname type(length) extra_info

Example: first varchar(15) NOT NULL

The following command is used in the PHP script to connect to the MySQL database:

mysql_connect(localhost,$username,$password);

where:

• localhost is the server address on which the web site is running,

• $username is the user name for the database access

• $password is the password for the database access

Executing PHP commands

After configuring and connecting to the MySQL database, you can start executing PHP commands on the server.

Following are the 2 methods of executing a PHP command:
• Entering the command in PHP using the following syntax:

Mysql_query($query)

This form of command can be used to repeat the command simply by changing the variable.

• Defining the command as a variable. The result of the operation will be assigned to the variable.

Data input and output

Inserting data using PHP is identical to the procedure of data input using HTML pages. The advantage of using PHP is that the script does not need to be changed for each new piece of input data. Users can also input their own data on the web page.

Following is an example of an HTML page with textboxes that can be used to enter data in a form:

Alternatively, you can use variables to input information into the database. Example:

$first=$_POST[‘first’];

$last=$_POST[‘last’];

$phone=$_POST[‘phone’];

$mobile=$_POST[‘mobile’];

$fax=$_POST[‘fax’];

$email=$_POST[’email’];

$web=$_POST[‘web’];

$query = “INSERT INTO contacts VALUES (”,’$first’,’$last’,’$phone’,’$mobile’,’$fax’,’$email’,’$web’)”;

mysql_query($query);

This script is saved in the insert.php file, which can be called from the HTML form. Using this method, data entered in the web page form is stored in the defined variables, which are then passed to the PHP.

To display (or output) the entered data using PHP, you can use the following MySQL command with the result assigned to the variable.

$query=”SELECT * FROM contacts”;

$result=mysql_query($query);

PHP provides 2 submission methods, GET and POST to get the data submitted by the form into your PHP script. GET method displays the variables and the data in the page address, while they are invisible in the POST method. For example, a script can be created that will display different web pages depending on the clicked link.

yourpage.php?user=david (to show David’s page)

yourpage.php?user=tom (to show Tom’s page)

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9 comments

Reyes Levar 02 Feb 2017

I was very pleased to find this web-site.I wanted to thanks for your time for this wonderful read!! I definitely enjoying every little bit of it and I have you bookmarked to check out new stuff you blog post.

Mahesh 08 Feb 2017

Sir, Very Useful Guide For PHP web development. for The connecting Database and Here are some queries which is very useful to me. Thank You sir.

http://stackoverflow.com.Minilinx.com/Contact 13 Feb 2017

Just want to say your article is as amazing. The clarity in your publish is jhst great and that i can assume yyou are an expert on this subject. Welll along with your permission allow me to take hold of your feed to keep up to date with forthcoming post. Thank you 1,000,000 and please carry oon the gratifying work.

lily 07 Jul 2017

PHP web development very use full for me from develop the web site and same queries very use full thank you sharing this post

deepa 28 Apr 2018

Thanks For Your valuable posting, it was very informative

satya 25 May 2018

Interesting topic, Well explanation. Thanks for sharing this article. Really very useful one for our php developers.

Yamini 04 Jul 2018

Thanks For Your valuable posting, it was very informative.

Udit Khanna 17 Jul 2018

Thanks for sharing such awesome article...

Manish Mehta 17 Jul 2018

It was really helpful. You guys are doing a great job. Keep Sharing!

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