php 300.0 meaning code example

Example 1: php ??

// Example usage for: Null Coalesce Operator
$action = $_POST['action'] ?? 'default';

// The above is identical to this if/else statement
if (isset($_POST['action'])) {
    $action = $_POST['action'];
} else {
    $action = 'default';
}

Example 2: php

<?php
  
  // This is a comment
  
  echo 'Hello, World!';
  
  // And this outputs Hello, World!
  
?>
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