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What are Comments in PHP

1.  Purpose
  • Explain Code: Comments in php help you (and others) understand the purpose and logic behind your code. They make it easier to follow and maintain your code, especially for complex or intricate parts.
  • Improve Readability: Well-commented code is significantly more readable and easier to understand, both for yourself and for other developers who might work on your code.
  • Debugging: PHP comments can be used to temporarily disable parts of your code while debugging. This helps you isolate and fix issues.
  • Documentation: Comments can be used to generate documentation for your code.
2. Syntax
  • Single-line comments:
    • Start with // or #
    • Comment continues until the end of the line.  
  • Example:
// This is a single-line comment
$name = "John Doe"; // Comment after the code
  • Multi-line comments:
    • Start with /* and end with */
    • Can span multiple lines.  
  • Example:
/* 
This is a 
multi-line comment. 
*/
3. Example of single line and multiline comments:
<?php
// Calculate the sum of two numbers
function add($a, $b) { 
/* 
This function adds two numbers together. 
@param int $a The first number.
@param int $b The second number.
@return int The sum of $a and $b.
*/
return $a + $b; 
}
$result = add(5, 3); // Calculate the sum
echo $result; // Output: 8 
?>
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