PHP comment symbols


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    In PHP, comments are used to explain code, and they are ignored by the interpreter. There are three main types of comment syntax in PHP:

    1. Single-line comments: There are two ways to create a single-line comment. You can use either // or #. Anything following these symbols on the same line will be considered a comment and will not be executed.


      // This is a single-line comment
      # This is also a single-line comment
      echo "Hello, world!"; // This is a comment after code
    2. Multi-line comments: These are used for longer explanations that span multiple lines. They start with /* and end with */. Everything between these symbols is considered a comment.


      This is a multi-line comment.
      It can span multiple lines.
      echo "Hello, world!";
    3. Documentation comments: These are a special type of multi-line comment used for PHPDoc, which is a tool that can generate documentation from comments. They start with /** and end with */. They're similar to regular multi-line comments but can include additional formatting to denote things like parameters, return types, etc.


       * Calculates the sum of two numbers.
       * @param int $a First number
       * @param int $b Second number
       * @return int Sum of $a and $b
      function sum($a, $b) {
          return $a + $b;

    These are the main ways to add comments in PHP code. Comments are essential for making your code more readable and maintainable, especially when working in a team.

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