PHP?? ?? ??? ??? ???
?? ?? ???????? ?? ??? ?? ?? ??? ??? ????? ?? ??? ? ????. ?? ??? ?????.
<code class="php">class A {
private $aa;
protected $bb = 'parent bb';
// ...
}
class B extends A {
function childfunction() {
echo parent::$bb; // Fatal error: Undefined class constant 'bb'
}
}
</code>
parent::$bb? ???? $bb ??? ?????? ?? ??? ?????. ?? ??? ???? ?? ??? ??? ???? ?? ?? ??? ???? ???? ? ?? ?????.
???: $this->bb ??
??? ?? ???? $bb ??? ???? ?????? $this->bb? ?????. ? ??? ?? ????? ??? ??? ???? ?? ??? ???? ??? ?????.
<code class="php">echo $this->bb;</code>
$bb ??? ???? ???? ???? ?? ??? ???? ??? ??? ? ????. $this ???? ???? ???? ? ????.
?? ??
?? ???? ??? ??? ???? ?? ????? parent::? ?????. ?? ?? ??? ?????.
<code class="php">class Airplane {
private $pilot;
public function __construct( $pilot ) {
$this->pilot = $pilot;
}
}
class Bomber extends Airplane {
private $navigator;
public function __construct( $pilot, $navigator ) {
$this->navigator = $navigator;
parent::__construct( $pilot ); // Assign to this->pilot
}
}</code>
??? parent::? ??? ???? ???? ???? $navigator ??? ?????. ?? ?? ??? ??? ????? DRY ??? ?? ? ????.
? ??? PHP?? ?? ??? ??? ????? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
? AI ??
Undress AI Tool
??? ???? ??
Undresser.AI Undress
???? ?? ??? ??? ?? AI ?? ?
AI Clothes Remover
???? ?? ???? ??? AI ?????.
Clothoff.io
AI ? ???
Video Face Swap
??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!
?? ??
??? ??
???++7.3.1
???? ?? ?? ?? ???
SublimeText3 ??? ??
??? ??, ???? ?? ????.
???? 13.0.1 ???
??? PHP ?? ?? ??
???? CS6
??? ? ?? ??
SublimeText3 Mac ??
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