Introduction to PHP Basics
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Introduction to PHP Basics
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Introduction to PHP Basics
- 1. What is PHP? Who invented? : Rasmus Lerdorf in 1994 History in 1994,Mr. Lerdrof developed PHP for personal use and then in 1995,he was released first version of PHP with name PERSONAL HOMEPAGE,and it was being used on approx 50000 site in 1997. •PHP stands for PHP: Hypertext Preprocessor. •PHP is a server-side scripting language •Open Source Technology •Robust •Freeware
- 2. How it works PHP is a general-purpose scripting language that is used in creating Web pages, and can be embedded in HTML code. (PHP stands for "Hypertext Pre processor" even though the acronym doesn't match up exactly.) PHP is an open-source program, which means it's available for free on the Web There are three main areas where PHP scripts are used. − Server-side scripting. − Command line scripting. − Writing desktop applications
- 3. PHP Syntax Method 1: Short Open Tag <? … ?> // Not Recommended Method 2: <?php …. ?> Each PHP sentence is terminated with semi-colon (;) EXAMPLE: <?php echo 'Hello World'; ?>
- 4. Comments Single line Comment //This is a comment Multi line comment /* This is a comment block */ EXAMPLE: <?php //This is comment echo '<p>Hello World</p>'; ?>
- 5. Example <html> <head> <title>PHP Example</title> </head> <body> <?php echo '<p>Hello World</p>'; ?> </body> </html>
- 6. Literals All strings must be enclosed in single quote or double quote Example: <?php echo '<p>Hello World</p>'; ?> <?php echo "<p>Hello World</p>"; ?> NumbersNumbers are not enclosed in quotes Example: <?php echo 123; ?> Booleans can be directly written as true or false
- 7. Language Construct PHP have two language constructs which is used to display data 1. echo() 2. Print() Language construct can be used with or without brackets Example: <?php echo '<p>Hello World</p>'; print '<p>Hello World</p>'; echo ('<p>Hello World</p>'); print ('<p>Hello World</p>'); ?>
- 8. Thank You Thank You for reading… If you have any query feel free to contact us on at info@creativedev.in For more information about PHP, Go to our site www.creativedev.in