Hi, this sounds very embarrassing but i've been using too much $this->field keyword for so long i can't remember what's the difference between "php $this" and "php self".
does php "self" has any special functionality besides being called differently? surely there must've been some purpose.
example,
instead of $this->GetMyName(), it becomes self::GetMyName();
?
1 year 42 weeks ago
Use $this to refer to the current object. Use self to refer to the current class. In other words, use $this->member for non-static members, use self::$member for static members. (Reference: http://www.phpbuilder.com/board/showthread.php?t=10354489)
Examples:
Here is an example of correct usage of $this and self for non-static and static member variables:
<?php
class X {
private $non_static_member = 1;
private static $static_member = 2;
function __construct() {
echo $this->non_static_member . ' '
. self::$static_member;
}
}
new X();
?>
Here is an example of polymorphism with $this for member functions:
<?php
class X {
function foo() {
echo 'X::foo()';
}
function bar() {
$this->foo();
}
}
class Y extends X {
function foo() {
echo 'Y::foo()';
}
}
$x = new Y();
$x->bar();
?>
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