I have some inquiries aboute this example, I make this simple code, just two classses, a parent and son class. When I execute the son must execute the parent and the parent method can execute himself BUT the program must not execute the son method.
When I run this program, execute both, parent and son. Exist any to prevent this and execute only the father's method?
class Father{
private $element = 0; //Just to prevent recursivity
public function add($a = null){
if ($this->element == 0) {
echo "<br>I'm the father"; //Execution of fhter
$this->element = 1;
$this->add('<br> I was an accidente'); //This instruccion call both methods, parent and soon
}else{
echo "<br>But not anymore";
}
}
}
class Son extends Father{
public function add($a = null){
parent::add();
echo "<br>I'm the son";
if ($a != null) {
echo $a;
}
}
}
$son = new Son();
$son->add();
And I have these results
I'm the father
But not anymore
I'm the son
I was an accident
I'm the son
Like you see, when I execute the $this->add() method on parent, they execute both methods (add of father and son).
Is there any way to perform this code so that when executing $this->add() on the father, it does not execute both (the father and the son)?
In other words, I was expecting the next result
I'm the father
But not anymore
I'm the son
I was an accident
BY THE WAY: I cant modify the Father class. Thanks
You just need to add the $element back into the Son class and use it like you did in the Father class:
class Son extends Father
{
# Add this item back
private $element = 1;
public function add($a = null)
{
parent::add();
# Check if it's set
if($this->element == 1) {
# Echo
echo "<br>I'm the son";
# Set to 0 so it doesn't recurse
$this->element = 0;
}
if ($a != null) {
echo $a;
}
}
}
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