What is the syntax for commenting in PHP?

In PHP, you can use several ways to add comments to your code:

1. Single-line comments:

   • Using //:

     // This is a single-line comment
     $variable = "value";
     

   • Using #:

     # This is also a single-line comment
     $variable = "value";
     

2. Multi-line comments:

   /*
     This is a multi-line comment
     which spans multiple lines.
   */
   $variable = "value";
   

Use // or # for comments that fit on a single line, and /* ... */ for comments that span multiple lines.