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PHP Integer

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PHP Integer An integer is a whole number (without decimals).  It is a number between -2,147,483,648 and +2,147,483,647. Rules for integers: An integer must have at least one digit (0-9) An integer cannot contain comma or blanks An integer must not have a decimal point An integer can be either positive or negative Integers can be specified in three formats: decimal (10-based), hexadecimal (16-based - prefixed with 0x) or octal (8-based - prefixed with 0) In the following example $x is an integer. The PHP var_dump() function returns the data type and value: Example <?php $x = 5985; var_dump($x); ?>
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PHP Data Types

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PHP Data Types Variables can store data of different types, and different data types can do different things. PHP supports the following data types: String Integer Float (floating point numbers - also called double) Boolean Array Object NULL Resource PHP String A string is a sequence of characters, like "Hello world!". A string can be any text inside quotes. You can use single or double quotes: Example <?php $x = "Hello world!"; $y = 'Hello world!'; echo $x; echo "<br>"; echo $y; ?>
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PHP 5 echo and print Statements

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PHP 5  echo and print Statements In PHP there are two basic ways to get output: echo and print. In this tutorial we use echo (and print) in almost every example. So, this chapter contains a little more info about those two output statements. PHP echo and print Statements echo and print are more or less the same. They are both used to output data to the screen. The differences are small: echo has no return value while print has a return value of 1 so it can be used in expressions. echo can take multiple parameters (although such usage is rare) while print can take one argument. echo is marginally faster than print. The PHP echo Statement The echo statement can be used with or without parentheses: echo or echo(). Display Text The following example shows how to output text with the echo command (notice that the text can contain HTML markup): Example <?php echo "<h2>PHP is Fun!</h2>"; echo "Hello world!<br>"; echo
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PHP 5 Variables

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PHP 5  Variables Creating (Declaring) PHP Variables In PHP, a variable starts with the $ sign, followed by the name of the variable: <?php $txt = "Hello world!"; $x = 5; $y = 10.5; ?> After the execution of the statements above, the variable  $txt  will hold the value  Hello world! , the variable  $x  will hold the value  5 , and the variable  $y  will hold the value  10.5 . Note:  When you assign a text value to a variable, put quotes around the value. Note:  Unlike other programming languages, PHP has no command for declaring a variable. It is created the moment you first assign a value to it.
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PHP 5 Installation

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PHP 5  Installation What Do I Need? To start using PHP, you can: Find a web host with PHP and MySQL support Install a web server on your own PC, and then install PHP and MySQL Use a Web Host With PHP Support If your server has activated support for PHP you do not need to do anything. Just create some .php files, place them in your web directory, and the server will automatically parse them for you. You do not need to compile anything or install any extra tools. Because PHP is free, most web hosts offer PHP support. Set Up PHP on Your Own PC However, if your server does not support PHP, you must: install a web server install PHP install a database, such as MySQL The official PHP website (PHP.net) has installation instructions for PHP:  http://php.net/manual/en/install.php
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Easy Learning with "Show PHP"

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Easy Learning with "Show PHP" Our "Show PHP" tool makes it easy to learn PHP, it shows both the PHP source code and the HTML output of the code. <!DOCTYPE html> <html> <body> <?php echo "My first PHP script!"; ?> </body> </html>
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PHP 5 Tutorial

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PHP 5  Tutorial PHP is a server scripting language, and a powerful tool for making dynamic and interactive Web pages. PHP is a widely-used, free, and efficient alternative to competitors such as Microsoft's ASP.
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