Proofreading classes pages

code/classes-inheritance.php

@@ -27,7 +27,7 @@ class Tractor extends Vehicle
     }
 }
 
-// Outputs "driving slowly..." instead of "driving...".
+// The drive function now outputs "driving slowly..." instead of "driving...".
 $tractor = new Tractor();
 $tractor->drive();
 

code/classes-visibility.php

@@ -35,7 +35,7 @@ class Phone2
 
 // The "protected" and "private" keywords work a little differently.
 // They both prevent functions and properties from being accessed outside an object.
-// However, a method or property marked "protected" can still be accessed by a child object.
+// However, a method or property marked "protected" can still be accessed by a child class.
 class Phone3
 {
     private $number;
@@ -49,7 +49,7 @@ class Phone3
 }
 
 // In class "Smartphone", the "caller" property is accessible because the parent class
-// has it marked as "protected". However, "Smartphone" cannot access the the "number" property
+// has it marked as "protected". However, "Smartphone" cannot access the "number" property
 // because it is still listed as private.
 class Smartphone extends Phone3
 {

code/classes.php

@@ -43,6 +43,7 @@ class Tricycle
     }
 }
 
+// You can execute a method on an object using the same "->" arrow characters.
 $bike = new Tricycle();
 $bike->color = 'Red';
 $bike->echoColor();

code/static.php

@@ -45,8 +45,8 @@ $skyscraper = new Skyscraper();
 echo $skyscraper->color . "\n";
 
 // Often, you will see static constructors in PHP.
-// A static constructor creates a new instance of an object. Why would do that when you just use "new Class" to create
+// A static constructor creates a new instance of an object. Why would do that when you can just use "new Class" to create
-// a new object? The most common reason is to make the code more readable.
+// the object? The most common reason is to make the code more readable.
 class TinyHouse
 {
     private $color;
@@ -66,5 +66,5 @@ class TinyHouse
     }
 }
 
-// Using "build" can make more sense than "new", but it is ultimately a personal choice.
+// Using "build" can make more sense than "new", but it is ultimately a personal preference.
 $house = TinyHouse::build('Blue', 4, true);