Syntax and Programming Structure of PHP - PHP Tutorial for Developers by Aegis Software Part 2

When the name comes the PHP, the first thing comes is the ease of coding. Now as the developers know, code is executed at server side and the result which is sent to the browse is in plain HTML format.

Considering this tutorial to guide PHP developers who are beginners, here is the first step towards start coding in PHP.

Syntax:

Within ?php and ? Developers need to add server side scripting. This version of syntax is more commonly compatible. One of the comparatively less compatible version of syntax is to write script within . This version excludes writing php from the syntax. Also this syntax is compatible where shorthand support is enabled. But it is recommended to use the first universally compatible syntax so that integrity of code is maintained across the web.

A php file not only contain solely scripting language but also includes HTML tags as well.

Each code line in php ends with semicolon, as you might have observed in C and C++. This semicolon is known as distinguisher as it differentiates sets of instructions in overall code. There are two statements are supported by php to output the text. One is echo and second is print. One thing to be considered is that the file must have .php extension and not the .html.

Comments in PHP

The commenting in PHP is very much the same as in C – C++.

In PHP, Developers use // to make a single-line comment or /* and */ to make a large comment block.

The upcoming part of this on going tutorial will include the tutorial for variables in php and the scope of this variable within the code scope.

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Introduction to Web application development for PHP Developers - PHP Tutorial by Aegis Software Part 1

How Web Applications works technically?

Web Application is final software products which interact with end users. Every web pages are stored at server located anywhere in the world. Whenever a user sends the request for certain page, the request is passed to certain ip address at which the web server is situated. Web server then resolve the query and provide user with requested page. At user side a partial replica of the web page is created temporary to let users view the page.

What web applications consist of?

A Web application or let say a containing website is a group of web pages which can be demanded from the web server. Web pages can either be of type static or dynamic. A static web page is that which has already been created with pre-filled contents at the server side. A dynamic page is that which is created at server side at run-time when a customize query from the user’s terminal is received. Forms, products or category pages and search pages are some of the example of Dynamic web pages. Dynamic pages mostly very much concerned with Database retrieval. Dynamic page or Static page can easily be identified by the URL structure which is gets generated after once the request gets processed by the Web server.

What languages used the most in web application development of every type?

There are few programming and/or scripting languages are there which are being used by majority of Developers:

• JavaScript/Ajax
• PHP
• ASP.net
• Python

What makes PHP more commonly used Server-side scripting language?

Being one of the open source scripting languages, PHP developers can always expect new functionality and feature development by using this language. Easy coding style identical to those of C++ makes it easy to adopt. Wide range of operation support helps PHP developers to implement websites from very easy to a complex one like WordPress. Also PHP got some really good interaction with various DBMS, which makes it priority for shopping cart or ecommerce website development.

What would you find contained in a PHP file?

A PHP with having extensions any out of .PHP, PHP3 or phtml can contain plain text, HTML tags and functional scripts.

Who’s the ideal match with PHP?

MySQL is the ideal matching back end while developing web applications especially ecommerce websites. Being a free to download software, MySQL is suitable for small to large application. Also, this database server supports standard query language.

Do only these two can work?

No, actually there are two or even we can say one member is there, which is Linux Apache. Apache is the web service provided implicitly by Linux operating system. Together these three are well known as LAMP.

Article Source: Introduction to Web application development for PHP Developers - PHP Tutorial by Aegis Software Part 1

PHP developers and error handling for SEO purposes

PHP is one of the simplest server side scripting language which needs no more promotion in the web development industry. Heavy traffic websites such as WordPress also uses this opensource programming language to manage complex database synchronization and to handle other functionality.

PHP developers are even more not bound to use specific range of functionality only, but they should also consider some of the out of box functionality which can be useful in website integrity and performance. One of the functionality is custom error handling. PHP developers must be aware of this simple phenomenon of error handling when 404 - page not found error occurred or page redirection happens. They can easily handle such error with placing some custom page when 404 occurs or redirecting broken link to the sitemap or to home page. But PHP developers should also understand the requirement of SEOs as well. As the thing is SEO is all about technicality rather than blind promotion campaign. What if a heavy traffic website get down for a while due to some causes like down time in web server. In such case PHP developer should handle 505 error and tell the bots to come to a website for crawling after certain period of time. Sometimes it may happen that if such errors are not handled properly at the time of website down time then bots may get and update a blank copy in their indexes which further causes the fall in ranking position and thus visitors.