Welcome is PHP ?
PHP: Hypertext Preprocessor (PHP) is a free, highly popular, open source scripting language. PHP scripts are executed on the server.
Just a short list of what PHP is capable of :
- Generating dynamic page content
- Creating, opening, reading, writing, deleting, and closing files on the server
- Collecting form data
- Adding, deleting, and modifying information stored in your database
- controlling user-access
- encrypting data
and much more !
Before learning php , you should have a basic understanding of HTML.
Why PHP ?
- PHP runs on numerous, varying platforms, including Windows, Linux, Unix, Mac OS X, and so on.
- PHP is compatible with almost any modern server, such as Apache, IIS, and more.
- PHP supports a wide range of databases.
- PHP is free!
- PHP is easy to learn and runs efficiently on the server side.
PHP Syntax ?
<?php
// PHP code goes here
?>
Php file Save extension ?
Php File Save extension is (.php)
Which text editor Use for Php ?
i recommend use notepad++
Let See 1st example of a simple PHP file.
-------------------------------------------
<html>
<head>
<title>My First PHP Page</title>
</head>
<body>
<?php
echo "Hello World!";
?>
</body>
</html>
-------------------------------------------
PHP Syntax
Alternatively, we can include PHP in the HTML <script> tag.
-------------------------------------------
<html>
<head>
<title>My First PHP Page</title>
</head>
<body>
<script language="php">
echo "Hello World!";
</script>
</body>
</html>
-----------------------------------------------
Note : The latest version of PHP removes support for <script language="php"> tags. As such, i recommend using <?php ?> exclusively.
PHP Syntax
You can also use the shorthand PHP tags, <? ?>, as long as they're supported by the server.
<?
echo "Hello World!";
?>
What is Echo in Php ?
In actuality, it's not a function; it's a language construct. As such, it does not require parentheses.
Let's output a text.
-----------------------
<?php
echo "I love PHP!";
?>
echo "I love PHP!";
?>
-----------------------
Output : I love PHP!
PHP Statements
Each PHP statement must end with a semicolon.
<?php
echo "A";
echo "B";
echo "C";
?>
Output: ABC
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