Member properties cannot be shared between two steps

Member properties cannot be shared between two methods

Class A {
    Public $a = 0;
     Public Fucntion ax () {
        $this->a= ' 111 ';
     }

    Public Fucntion bx () {
        Echo $this->a;
     }
}

How can I call a $ A value equal to 111 in BX () after the $a is assigned in AX ()? After assigning a property to one of the methods, the other method cannot get the value. PHP class

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------Solution--------------------
AX,BX is executed sequentially after instantiation.
You have to understand that AX/BX is parallel within the class, not that you write in front, and that the back has values

------Solution--------------------

Class A {    
Public $a = 0;     
Public function A () {        
return $this->a= ' 111 ';    
}     
Public Function bx () {        
echo $this->a ();     
}
}

$p = new A ();
$p->BX ();

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