PHP Variables
A PHP Variable is simply an element or data item that may take on more than one value during the run-time of a program.
In other words, a PHP variable store a value that can change, depending on conditions or on information passed to the program.
PHP Variables Rules:
- In PHP, variable names are case-sensitive.
- Variables in PHP are represented by a dollar sign followed by the name of the variable.
- A valid variable name starts with a letter or underscores, followed by any number of letters, numbers, or underscores.
- After declaring a variable it can be reused throughout the code.
- A variable does not need to be declared before adding a value to it.
- PHP automatically converts the variable to the correct data type, depending on its value.
- The assignment operator
(=)used to assign value to a variable.
PHP Variables Example:
<?php
$content = "Hello PHP!";
$a = 10;
$_msg = 'Hello again';
echo $content;
echo "<br>".$a;
echo "<br>".$_msg;
?>
Tutorials Class - Output Window
Hello PHP!
10
Hello again
Congratulations! Chapter Finished. Learn more about the similar topics:
| Interview Questions & Answers |
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| How to check if a variable is empty in PHP? |
| Is PHP a case sensitive language? |
| What are the different data types in PHP? |