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Thread: pHP kiya hOtA hAI aur Kaisy Use Hota Hai Learn Karin ;)

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    Exclamation pHP kiya hOtA hAI aur Kaisy Use Hota Hai Learn Karin ;)

    Webhosting in Pakistan
    PHP is a powerful server-side scripting language for creating dynamic and interactive websites.

    PHP is the widely-used, free, and efficient alternative to competitors such as Microsoft's ASP. PHP is perfectly suited for Web development and can be embedded directly into the HTML code.

    The PHP syntax is very similar to Perl and C. PHP is often used together with Apache (web server) on various operating systems. It also supports ISAPI and can be used with Microsoft's IIS on Windows.

    What You Should Already Know

    Before you continue you should have a basic understanding of the following:
    HTML
    Some scripting knowledge

    If you want to study these subjects first, find the tutorials on our Home page.
    What is PHP?
    PHP stands for PHP: Hypertext Preprocessor
    PHP is a server-side scripting language, like ASP
    PHP scripts are executed on the server
    PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.)
    PHP is an open source software
    PHP is free to download and use
    What is a PHP File?
    PHP files can contain text, HTML tags and scripts
    PHP files are returned to the browser as plain HTML
    PHP files have a file extension of ".php", ".php3", or ".phtml"
    What is MySQL?
    MySQL is a database server
    MySQL is ideal for both small and large applications
    MySQL supports standard SQL
    MySQL compiles on a number of platforms
    MySQL is free to download and use
    PHP + MySQL
    PHP combined with MySQL are cross-platform (you can develop in Windows and serve on a Unix platform)
    Why PHP?
    PHP runs on different platforms (Windows, Linux, Unix, etc.)
    PHP is compatible with almost all servers used today (Apache, IIS, etc.)
    PHP is FREE to download from the official PHP resource: www.php.net
    PHP is easy to learn and runs efficiently on the server side
    Where to Start?

    To get access to a web server with PHP support, you can:
    Install Apache (or IIS) on your own server, install PHP, and MySQL
    Or find a web hosting plan with PHP and MySQL support

    What do You Need?

    If your server supports PHP you don't need to do anything. Just create some .php files in your web directory, and the server will parse them for you. Because it is free, most web hosts offer PHP support.

    However, if your server does not support PHP, you must install PHP.

    Here is a link to a good tutorial from PHP.net on how to install PHP5: http://www.php.net/manual/en/install.php
    Download PHP

    Download PHP for free here: http://www.php.net/downloads.php
    Download MySQL Database

    Download MySQL for free here: http://www.mysql.com/downloads/index.html
    Download Apache Server

    Download Apache for free here: http://httpd.apache.org/download.cgi

    browser.
    Basic PHP Syntax

    A PHP scripting block always starts with <?php and ends with ?>. A PHP scripting block can be placed anywhere in the document.

    On servers with shorthand support enabled you can start a scripting block with <? and end with ?>.

    For maximum compatibility, we recommend that you use the standard form (<?php) rather than the shorthand form.<?php
    ?>


    A PHP file normally contains HTML tags, just like an HTML file, and some PHP scripting code.

    Below, we have an example of a simple PHP script which sends the text "Hello World" to the browser:<html>
    <body>
    <?php
    echo "Hello World";
    ?>
    </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 statements to output text with PHP: echo and print. In the example above we have used the echo statement to output the text "Hello World".

    Note: The file must have the .php extension. If the file has a .html extension, the PHP code will not be executed.
    Comments in PHP

    In PHP, we use // to make a single-line comment or /* and */ to make a large comment block.<html>
    <body>
    <?php
    //This is a comment
    /*
    This is
    a comment
    block
    */
    ?>
    </body>
    </html>

    Variables are used for storing values, such as numbers, strings or function results, so that they can be used many times in a script.
    Variables in PHP

    Variables are used for storing a values, like text strings, numbers or arrays.

    When a variable is set it can be used over and over again in your script

    All variables in PHP start with a $ sign symbol.

    The correct way of setting a variable in PHP:$var_name = value;


    New PHP programmers often forget the $ sign at the beginning of the variable. In that case it will not work.

    Let's try creating a variable with a string, and a variable with a number:<?php
    $txt = "Hello World!";
    $number = 16;
    ?>


    PHP is a Loosely Typed Language

    In PHP a variable does not need to be declared before being set.

    In the example above, you see that you do not have to tell PHP which data type the variable is.

    PHP automatically converts the variable to the correct data type, depending on how they are set.

    In a strongly typed programming language, you have to declare (define) the type and name of the variable before using it.

    In PHP the variable is declared automatically when you use it.
    Variable Naming Rules
    A variable name must start with a letter or an underscore "_"
    A variable name can only contain alpha-numeric characters and underscores (a-z, A-Z, 0-9, and _ )
    A variable name should not contain spaces. If a variable name is more than one word, it should be separated with underscore ($my_string), or with capitalization ($myString)

    A string variable is used to store and manipulate a piece of text.
    Strings in PHP

    String variables are used for values that contains character strings.

    In this tutorial we are going to look at some of the most common functions and operators used to manipulate strings in PHP.

    After we create a string we can manipulate it. A string can be used directly in a function or it can be stored in a variable.

    Below, the PHP script assigns the string "Hello World" to a string variable called $txt:<?php
    $txt="Hello World";
    echo $txt;
    ?>


    The output of the code above will be:Hello World


    Now, lets try to use some different functions and operators to manipulate our string.
    The Concatenation Operator

    There is only one string operator in PHP.

    The concatenation operator (.) is used to put two string values together.

    To concatenate two variables together, use the dot (.) operator:<?php
    $txt1="Hello World";
    $txt2="1234";
    echo $txt1 . " " . $txt2;
    ?>


    The output of the code above will be:Hello World 1234


    If we look at the code above you see that we used the concatenation operator two times. This is because we had to insert a third string.

    Between the two string variables we added a string with a single character, an empty space, to separate the two variables.
    Using the strlen() function

    The strlen() function is used to find the length of a string.

    Let's find the length of our string "Hello world!":<?php
    echo strlen("Hello world!");
    ?>


    The output of the code above will be:12


    The length of a string is often used in loops or other functions, when it is important to know when the string ends. (i.e. in a loop, we would want to stop the loop after the last character in the string)
    Using the strpos() function

    The strpos() function is used to search for a string or character within a string.

    If a match is found in the string, this function will return the position of the first match. If no match is found, it will return FALSE.

    Let's see if we can find the string "world" in our string:<?php
    echo strpos("Hello world!","world");
    ?>


    The output of the code above will be:6


    As you see the position of the string "world" in our string is position 6. The reason that it is 6, and not 7, is that the first position in the string is 0, and not 1.

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    all info from w3school but thanx for sharing us

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    Yes i Know But Who Do Not Know THis I am Helping Them ThanKs

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    Quote isnpk said: View Post
    these all info taken from w3schools.com

    regards

    isnpk.com
    I know put i am training all It's From this info thank YOu Those who not know these things will attract This is my mission :S

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    Lover Rahi mISsion pasan aya mera ?

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    Dont copy paste original materials from another site/place (until owner gives you permission doing this) because it against copyright act. By the way Thanks alot....
    Death is not the biggest Loss in life.
    The biggest loss is when relationships die among us when we are alive!!
    (Shakespeare)

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    Thread tu acha hai par copyright teht k Khelaaf warzi nahi krni chaaheiy the tumy

    Dosre aham bat PHP tutorial k lie alag section banaya gia hai tumy apna tutorial wahaan post krna chaaheiy tha, na k yahaan

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    Sorry mein naaya naaya ayaa hun aur mein ab copyright kay khilaaf nhi jaaon ga! aND thNx

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    Thats good,
    Beshak dosry sites sy mawad akatta kro par os mai apni traf sy changes kia kro maslan English wala Urdu mai translate kro

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    thnxXx

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    smartjust4u's Avatar
    smartjust4u is offline Senior Member+
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    Sahring Achi hai Magar agar urdu main app Type karkay Screen Shot ke madad say Samjhatay to Sab Users to aram say Samajh aajata Ok

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    russian981 is offline Member
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    Webhosting in Pakistan
    Last edited by russian981; 18th March 2009 at 05:32 PM.

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