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PHP Programming Tips: A Useful Tip's Guide for all Types of PHP Programmer

Updated on June 22, 2011

PHP is a server site scripting language which executes on the server and supports many databases. To learn more about PHP, click here. Many PHP programmers, mostly the beginners face several types of problems, when they start PHP programming. The problem may like installing PHP, running the PHP code, error message etc. This page will explains some of these types of problem. The content of this page will be based on the following topics:

  • PHP Installation Tips
  • PHP File Creation Tips
  • Where to Loacate PHP Files
  • PHP Script's Basic Starting and Ending Tips
  • PHP Script's Commenting Tips
  • PHP Code Line Ending Tips
  • PHP Variables Tips
  • PHP String Tips

To learn the tips, go through the contents.

PHP Installation Tips

If your server supports PHP you don't need to install PHP or do anything. You just create some .php files in your web directory, and the server will parse. However, if your server does not support PHP, you must have to install PHP.

PHP.net provides a good tutorials for installing PHP. To read the tutorial, just visit http://www.php.net/manual/en/install.php.

For the beginners, it's quite hard to install and run PHP successfully. There is an alternate solution. I prefer recommended this techniques. There is one installation package which includes everything related to PHP environment. Just visit the link http://www.apachefriends.org/en/xampp.html and download the desired package and install it. Now you can get the environment to code. If you follow this techniques, you just have to code and run the xampp.

PHP File Creation Tips

PHP files may contain text, HTML and script blocks. But remember, PHP file has the following extensions:

  • .php
  • .php3
  • .phtml

You must have to use any of the three extensions. Most new program, don't care it and they face problems. So, remember, any types of PHP file must be .php or .php3 or .phtml extensions.

For example, if you write a "Hellow World" program using php, then the file name may look like the followings:

  • Hello_World.php

Where to Loacate PHP Files

All the PHP files are resided into htdocs folder. If you successfully installed PHP, Apache server then in your installation directory, you will find a folder named as htdocs. All of your PHP files must be located in that folder.

PHP Script's Basic Starting and Ending Tips

All PHP code block starts with a <?php tag and ends with ?> tag. This is the standard tags. Some servers also support shorterhand tags (<? for starting tag and ?> for ending tag). But it's a best idea to use the standarded tag set (i.e. <?php and ?> for starting and ending tag) .

Code:

<?php

// php code block

?>

PHP Script's Commenting Tips

Sometimes, you need to insert comment into your code. To insert comment use " // " for single line comment and for multiple lines comment use " /* " and " */ " and put the comment block in between them.

Code:

<?php

// single line comment

/*
   multiple lines of comment
   multiple lines of comment

*/

?>

PHP Code Line Ending Tips

Each code line in PHP must be ended with a semicolon ( ; ). This semicolon is actually a separator and it is used to distinguish one set of instructions form another sets of instructions.

The new programmer often do mistake to put a semicolon at the end of the code line and may find undesirable output. So, always to put semicolon in each line code end.

Code:

<html>
<body>

<?php
    echo "Hello World!!";
?>

</body>
</html>

PHP Variables Tips

All PHP variables must starts with a $ sign. Variables are used for storing values, such as numbers, strings or function results. New programmer very often do mistakes to put the sing of each variables and if they do then the code may not work. After the $ sign, the variable name located. Variable name has some naming rules:

  • Variable names must be started with any letter or an underscore (" _ ")
  • Variable names can contain only alpha-numeric characters (a-z, A-Z, 0-9) and underscore (" _ ")
  • No space is allowed into the variable names

Example of variables:

  • $a
  • $my_number
  • $my_string
  • $x1

PHP String Tips

String is used to store and manipulate a piece of text. All the strings of PHP are located between " and ".

code:

<?php
    echo "Hello World!!";
?>


All these are some of the common tips of programming with PHP. In the comment section, you can include more tips.

© Written by rancidTaste

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