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PHP
PHP stands for HYPERTEXT PREPROCESSOR. It is a powerful tool, which is used for developing dynamic and interactive WebPages. It was developed as a competitor for ASP. It is a server side scripting language and the scripts are executed on the server. These scripts or the commands are executed on the server before sending them to the browser for viewing. Some examples like viewing date and time can be done using the PHP commands and also one can keep track of the number of times the page has been visited etc.. All these interactive pages can be done using the PHP commands. PHP supports all major databases like MYSQL, ORACLE, and SYBASE etc. PHP is easy to learn and execute on the server. PHP can be executed on all servers available today. PHP page contains HTML Tags and script It is an open source software. Once the script is executed on the server it is returned back to the browser as plain HTML .PHP runs on different platforms. PHP files are stored with a. phpfile extension. A PHP page consists of HTML Tags and some php coding. It starts with a
Forexample::
<html>
<body>
<?php
echo"HelloWorld";
?>
</body>
</html>
Each code line in PHP must end with a semicolon. The semicolon is a separator and is used to distinguish one set of instructions from another.
There are two basic output statements in PHP, they are echo and print
PHP is combined with MYSQL a cross platform. MYSQL is an open source database system used to store and retrieve data like any other database systems.
All the programming code can be used in PHP. All variables in PHP start with a $ sign symbol. Variables are used to store number, strings, arrays etc.
PHP is a loosely typed language. In other programming languages variable should be declared the type and name of the variable where as in PHP a variable need be assigned a value before declaring it. It automatically converts the variable in to correct data depending on its value.
Those commands are processed before the pages are sent from your Server to the Web browser of your visitor
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