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HOW TO USE DATE AND TIME IN PHP: PHP time and date function informs us about current date and time. it can be manipulated also. How time() function works: The time() function would work by our server time and can be changed. It returns integer but not the argument. Date and time are stored in …
PHP Introduction PHP is a server-side scripting language that is used for web development. Itstands for Hypertext Preprocessor. It is faster than other programming language. It supports multiple databases like MySQL, SQL, PostgreSQL and many more. History PHP was developed by Rasmus Lerdorf in 1995. It is used to develop dynamic web application. The earlier …
To install PHP, We have to installed AMP(Apache, MySQL and PHP) software. There are various AMP software available in the market. XAMPP (Cross-Platform, Apache, MySQL, PHP and Perl) for windows. WAMP (Windows, Apache, MySQL and PHP) for windows. LAMP (Linux, Apache, MySQL and PHP) for Linux. MAMP for Mac. SAMP for Solaris. FAMP for FreeBSD. …
We can create a simple program by writing the source code inside the php tag and save it with.PHP extension. Syntax:
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<?php // your code here ?> |
Let us take an example of PHP.
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<!DOCTYPE html> <html> <head> <title>PHP Program</title> </head> <body> <?php echo "Hello PHP"; ?> </body> </html> |
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PHP Variable is the name of memory location used to hold the data. In PHP, variable starts with $ symbol. Rules for PHP Variables. Variable starts with $ sign. Variable name must start with a letter or the underscore character. Variable name can contain alpha-numeric character (A-Z. 0-9). Variable name are case-sensitive ($name and $NAME …
PHP $var variable is a normal variable that stores any value. PHP $$var variable is a reference variable that stores the value of$var inside it. Let us take an example. Example 1
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<?php $x = "Hello"; // normal variable $$x = 100; // reference variable echo $x."<br/>"; echo $$x."<br/>"; ?> |
Output Hello 100 100 Example 2
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<?php $name="Rasmus"; // normal variable $$name="Rasmus"; // reference variable echo $name."<br/>"; echo $$name."<br/>"; echo $Rasmus; ?> |
Output : Rasmus Rasmus Rasmus ← Prev Next →
There are various predefine “superglobals” in PHP. These variables can easily accessible in function or class. Following are the superglobals variables: $GLOBALS $_SERVER $_REQUEST $_POST $_GETetc. PHP $GLOBALS The “$GLOBAL” isa keyword that is used to accesssuper global variablefrom anywhere in the PHP script. Example 1:
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<?php $nos1 = 20; $nos2 = 30; function addition() { $GLOBALS['nos'] = $GLOBALS['nos1'] + $GLOBALS['nos2']; } addition(); echo $nos; ?> |
Output 50 PHP $_SERVER PHP $_SERVER is a …
In PHP, echo and print is used to get output data to the screen but there is some difference, between echo and print. PHP echo PHP echo is used to display the output data.It can be used with parentheses or without parentheses. We can pass multiple stringsseparated by(,) comma operator. It does not return any …
PHP constant is an identifier(name) for a simple value. The value does not change during the script. It starts with a letter or underscore not $ sign. The define()function is used to create a constant. Syntax:
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define(name, value, case-insensitive); |
Example:
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<!DOCTYPE html> <html> <body> <?php // case-sensitive constant name define("GREETING", "Welcome to PHP Tutorial"); echo GREETING; ?> </body> </html> |
Output Welcome to PHP Tutorial Constants are Global PHP constant is automatically global. It can be …
There are various predefine PHP Magic Constants. It starts with underscore(__) and ends with double underscore. Magic Constant Description __LINE__ To check current line number of the file. __FILE__ To check full path and filename of the file. __FUNCTION__ To check function name. __CLASS__ To check class name. __METHOD__ To check class method name. PHP_VERSION …