PHP destructor and garbage collection mechanism

class person{
 public function __destruct() {
 echo "The destructor is executed here";
 echo "This is generally used Place, close the database, close the file, etc. finishing work ";
 }
}
$p = new person();
for ($i = 0; $i < 5; $i++) {
 echo "< br /> $i";
}
//The object is destroyed before the php program ends.
?>

When the object is not pointed to, the object is destroyed.

class person {
 public function __destruct() {
 echo "The destructor is executed here";
 echo " Generally used here To place, close the database, close the file, etc. ";
 }
}
$p = new person();
$p = null;
//We see here that the destructor is executed here. .
for ($i = 0; $i < 5; $i++) {
 echo " $i";
}
?>

Set $p Assign $p a string if it is empty or on line 11, so that the object pointed to by $p becomes a garbage object. PHP will garbage destroy this object.

unset variable

class person {
 public function __destruct() {
 echo "The destructor is executed here";
 }
}
$ p = new person();
$p1 = $p; //Set the new reference variable $p1 to also point to this object
unset($p);
echo "Do you see that /$p is destroyed and the object is also destroyed? What?";
for ($i = 0; $i < 5; $i++) {
 echo " $i";
}
unset($p1);
echo "We see Here, the destructor is executed";
?>

When unset a reference variable, unset destroys the variable pointing to the object, not the object.