Basic PHP Syntax in this post I’m going to share How Learn Basic PHP Syntax so you will be write your own first PHP script , before you write your first PHP script you have to know the PHP script can be placed anywhere in the document and PHP script starts with
<?php and end with ?>
and default file extension for PHP files is “.php”. for example if you are create first page in PHP and you give your page name index then this index extension will “index.php”
Learn PHP Programming Step by Step Guide for Beginners
The Basic PHP Syntax are as follows
Comments in PHP
A comment in PHP code is a line that is not read/executed as part of the program. Its only purpose is to be read by someone who is looking at the code.
Comments can be used to:
Single-line comments − They are generally used for short explanations or notes relevant to the local code. Here are the examples of single line comments.
<?php # This is a comment, and # This is the second line of the comment // This is a comment too. Each style comments only ?>
Multi-lines comments − They are generally used to offer pseudocode algorithms and more detailed explanations when necessary. The multiline style of commenting is the same as in C. Here are the example of multi lines comments.
<?php /* This is a multiple-lines comment block that spans over multiple lines */ ?>
Let others understand what you are doing remind yourself of what you did – Most programmers have experienced coming back to their own work a year or two later and having to re-figure out what they did. Comments can remind you of what you were thinking when you wrote the code
PHP Case Sensitivity
In PHP, all keywords (e.g. if, else, while, etc.), classes, functions, and user-defined functions are NOT case-sensitive.
In the example below, all echo statements below are equal.
<!DOCTYPE html> <html> <body> <?php ECHO "Hello World!<br>"; echo "Hello World!<br>"; EcHo "Hello World!<br>"; ?> </body> </html>
This will produce the following result
Hello World! Hello World! Hello World!
But all variable names are case-sensitive in PHP.
In the example below, only the first variable will display the value of the $color variable this is because $color, $COLOR, and $coLOR are treated as three different variables
<!DOCTYPE html> <html> <body> <?php $color = "red"; echo "My car is " . $color . "<br>"; echo "My house is " . $COLOR . "<br>"; echo "My boat is " . $coLOR . "<br>"; ?> </body> </html>
This will produce the following result
My car is red My house is My boat is
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