Sync clock (#863)

exercises/practice/clock/.meta/config.json

@@ -22,6 +22,5 @@
     ]
   },
   "blurb": "Implement a clock that handles times without dates.",
-  "source": "Pairing session with Erin Drummond",
-  "source_url": "https://twitter.com/ebdrummond"
+  "source": "Pairing session with Erin Drummond"
 }

exercises/practice/clock/.meta/example.php

@@ -1,27 +1,5 @@
 <?php
 
-/*
- * By adding type hints and enabling strict type checking, code can become
- * easier to read, self-documenting and reduce the number of potential bugs.
- * By default, type declarations are non-strict, which means they will attempt
- * to change the original type to match the type specified by the
- * type-declaration.
- *
- * In other words, if you pass a string to a function requiring a float,
- * it will attempt to convert the string value to a float.
- *
- * To enable strict mode, a single declare directive must be placed at the top
- * of the file.
- * This means that the strictness of typing is configured on a per-file basis.
- * This directive not only affects the type declarations of parameters, but also
- * a function's return type.
- *
- * For more info review the Concept on strict type checking in the PHP track
- * <link>.
- *
- * To disable strict typing, comment out the directive below.
- */
-
 declare(strict_types=1);
 
 class Clock

exercises/practice/clock/Clock.php

@@ -26,6 +26,17 @@
 
 class Clock
 {
+    /**
+     * This class implements PHP's magic method __toString().
+     *
+     * By implementing this method, the class adheres to the `Stringable` interface.
+     * When an object of this class is used in string context (e.g., echo or string cast),
+     * this method is automatically called.
+     *
+     * More on `Stringable`: https://www.php.net/manual/en/class.stringable.php
+     *
+     * @return string The string representation of the Clock object
+     */
     public function __toString(): string
     {
         throw new \BadMethodCallException("Implement the __toString function");