When PHP Interpreter parses a php code, It looks opening and closing tag of php code which are '<?php' and '?>'. These opening and closing tag tells the Interpreter to interpret the code between the '<?php' and '?>' tag.
Does PHP also support short open tags '<?'.
- This feature is available if enabled this short_open_tag in the php.ini configuration file.
- like C language php requires a semicolon at the end of every statement.
Let us take a basic program to understand the php syntax
<?php // some code goes here... ?>
How to make a first php program?
Step 1: Open the text editor.
Step 2: Write some php code between <?php and ?> these tag.
Step 3: Save this file named "index.php", .php extension is must for execute this program in PHP parser.
Step 4: Save this file anywhere inside the root directory of the webserver or in your local web server's root directory.
Step 5: Open the web browser and type "http://127.0.0.1/index.php" or "http://localhost/index.php" in the URL address bar and hit enter.
Write a program named "index.php" & save it
<!DOCTYPE html> <html> <head> <title>A Simple Program</title> </head> <body> <?php echo "<h1>This is my first PHP program</h1>"; ?> </body> </html>
How to use comments in PHP?
PHP supports both single-line and multiline comments.
<?php // This is the single-line comment # This is the single-line comment /* This is the multiline comment line 1 line 2 : : line n */ ?>