<?php
class Foo {
private $id;
public function __construct() {
$this->id = 1;
}
public function __toString() {
return $id . "";
}
public function setId($id) {
$this->id = $id;
}
}
$a = new Foo; // $a is a pointer pointing to Foo object 0
$b = $a; // $b is a pointer pointing to Foo object 0, however, $b is a copy of $a
$a->setId(5);
unset($b);
var_dump($b);
Notice: Undefined variable: b in /in/0n43p on line 20
NULL
Output for 7.3.32 - 7.3.33
NULL
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: b in /in/0n43p on line 20
NULL
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/0n43p on line 4
Process exited with code 255.
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/0n43p on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/0n43p on line 4
Process exited with code 255.