diff --git a/language/oop5/properties.xml b/language/oop5/properties.xml
index 67ceca45cd..45aaacb142 100644
--- a/language/oop5/properties.xml
+++ b/language/oop5/properties.xml
@@ -4,10 +4,10 @@
Properties
- Class member variables are called "properties". You may also see
- them referred to using other terms such as "attributes" or
- "fields", but for the purposes of this reference we will use
- "properties". They are defined by using one of the
+ Class member variables are called properties. You may also see
+ them referred to using other terms such as attributes or
+ fields, but for the purposes of this reference we will use
+ properties. They are defined by using one of the
keywords public, protected,
or private, optionally followed by a type declaration,
followed by a normal variable declaration. This declaration may
@@ -101,15 +101,17 @@ EOD;
-
- As of PHP 5.3.0
- heredocs and
- nowdocs
- can be used in any static data context, including property
- declarations.
-
- Example of using a nowdoc to initialize a property
-
+
+ Heredoc and Nowdoc
+
+ As of PHP 5.3.0
+ heredocs and
+ nowdocs
+ can be used in any static data context, including property
+ declarations.
+
+ Example of using a nowdoc to initialize a property
+
]]>
-
-
-
-
-
- Nowdoc and Heredoc support was added in PHP 5.3.0.
+
+
-
+
+
+ Nowdoc and Heredoc support was added in PHP 5.3.0.
+
+
+
-
- As of PHP 7.4.0, property definitions can include a type declaration, with the exception of
- the callable type.
-
- Example of typed properties
-
+
+ Type declarations
+
+ As of PHP 7.4.0, property definitions can include a type declaration.
+
+ Example of typed properties
+
id = $id;
$this->name = $name;
}
}
-$user = new User(1234, "php");
-echo "ID: " . $user->id;
-echo "\n";
-echo "Name: " . $user->name;
+$user = new User(1234, null);
+
+var_dump($user->id);
+var_dump($user->name);
?>
]]>
-
- &example.outputs;
-
+
+ &example.outputs;
+
-
-
-
+
+
+
+
+
+ Typed properties must be initialized before accessing, otherwise an
+ Error is thrown.
+
+ Accessing properties
+
+numberOfSides = $numberOfSides;
+ }
+
+ public function setName(string $name): void
+ {
+ $this->name = $name;
+ }
+
+ public function getNumberOfSides(): int
+ {
+ return $this->numberOfSides;
+ }
+
+ public function getName(): string
+ {
+ return $this->name;
+ }
+}
+
+$triangle = new Shape();
+$triangle->setName("triangle");
+$triangle->setNumberofSides(3);
+var_dump($triangle->getName());
+var_dump($triangle->getNumberOfSides());
+
+$circle = new Shape();
+$circle->setName("circle");
+var_dump($circle->getName());
+var_dump($circle->getNumberOfSides());
+?>
+]]>
+
+ &example.outputs;
+
+
+
+
+
+
+
+ Valid property types
+
+
+
+
+ Type
+ Description
+ Minimum PHP version
+
+
+
+
+ bool
+
+ The property must be boolean value.
+
+ PHP 7.4.0
+
+
+ int
+
+ The property must be an integer.
+
+ PHP 7.4.0
+
+
+ float
+
+ The property must be a floating point number.
+
+ PHP 7.4.0
+
+
+ string
+
+ The property must be a string.
+
+ PHP 7.4.0
+
+
+ array
+
+ The property must be an array.
+
+ PHP 7.4.0
+
+
+ object
+
+ The property must be an object.
+
+ PHP 7.4.0
+
+
+ iterable
+
+ The property must be either an array or an &instanceof;
+ Traversable.
+
+ PHP 7.4.0
+
+
+ self
+
+ The property must be an &instanceof; the same class in which the
+ property is defined.
+
+ PHP 7.4.0
+
+
+ parent
+
+ The property must be an &instanceof; the parent class of the class
+ in which the property is defined.
+
+ PHP 7.4.0
+
+
+ Class/interface name
+
+ The property must be an &instanceof; the given class or interface
+ name.
+
+ PHP 7.4.0
+
+
+ ?type
+
+ The property must be the specified type, or &null;.
+
+ PHP 7.4.0
+
+
+
+
+
+