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<?php function &get_instance_ref() { static $obj; echo 'Static object: '; var_dump($obj); if (!isset($obj)) { // Assign a reference to the static variable $obj = &new stdclass; } $obj->property++; return $obj; } function &get_instance_noref() { static $obj; echo 'Static object: '; var_dump($obj); if (isset($obj)) {$a=2; // Assign the object to the static variable $obj = new stdclass($this->a); } $obj->property++; return $obj; } $obj1 = get_instance_ref(); $still_obj1 = get_instance_ref(); echo "\n"; $obj2 = get_instance_noref(); $still_obj2 = get_instance_noref(); $still_obj3 = get_instance_noref(); ?>
Output for hhvm-3.10.0 - 3.12.0
Static object: NULL Static object: NULL Static object: NULL Warning: Creating default object from empty value in /in/70TGU on line 28 Static object: object(stdClass)#3 (1) { ["property"]=> NULL } Notice: Undefined variable: this in /in/70TGU on line 25 Notice: Cannot access property on non-object in /in/70TGU on line 25 Static object: object(stdClass)#4 (1) { ["property"]=> int(1) } Notice: Undefined variable: this in /in/70TGU on line 25 Notice: Cannot access property on non-object in /in/70TGU on line 25
Output for 5.5.0 - 5.6.28
Deprecated: Assigning the return value of new by reference is deprecated in /in/70TGU on line 9 Static object: NULL Notice: Undefined property: stdClass::$property in /in/70TGU on line 11 Static object: NULL Notice: Undefined property: stdClass::$property in /in/70TGU on line 11 Static object: NULL Warning: Creating default object from empty value in /in/70TGU on line 28 Notice: Undefined property: stdClass::$property in /in/70TGU on line 28 Static object: object(stdClass)#3 (1) { ["property"]=> int(1) } Notice: Undefined property: stdClass::$property in /in/70TGU on line 28 Static object: object(stdClass)#4 (1) { ["property"]=> int(1) } Notice: Undefined property: stdClass::$property in /in/70TGU on line 28
Output for 5.4.0 - 5.4.45
Deprecated: Assigning the return value of new by reference is deprecated in /in/70TGU on line 9 Static object: NULL Static object: NULL Static object: NULL Warning: Creating default object from empty value in /in/70TGU on line 28 Static object: object(stdClass)#3 (1) { ["property"]=> int(1) } Static object: object(stdClass)#4 (1) { ["property"]=> int(1) }
Output for 5.3.0 - 5.3.29
Deprecated: Assigning the return value of new by reference is deprecated in /in/70TGU on line 9 Static object: NULL Static object: NULL Static object: NULL Strict Standards: Creating default object from empty value in /in/70TGU on line 28 Static object: object(stdClass)#3 (1) { ["property"]=> int(1) } Static object: object(stdClass)#4 (1) { ["property"]=> int(1) }
Output for 5.0.0 - 5.2.17
Strict Standards: Assigning the return value of new by reference is deprecated in /in/70TGU on line 9 Static object: NULL Static object: NULL Static object: NULL Strict Standards: Creating default object from empty value in /in/70TGU on line 28 Static object: object(stdClass)#3 (1) { ["property"]=> int(1) } Static object: object(stdClass)#4 (1) { ["property"]=> int(1) }
Output for 4.3.0 - 4.4.9
Static object: NULL Notice: Undefined property: property in /in/70TGU on line 11 Static object: NULL Notice: Undefined property: property in /in/70TGU on line 11 Static object: NULL Notice: Undefined property: property in /in/70TGU on line 28 Static object: object(stdClass)(1) { ["property"]=> int(1) } Notice: Undefined property: property in /in/70TGU on line 28 Static object: object(stdClass)(1) { ["property"]=> int(1) } Notice: Undefined property: property in /in/70TGU on line 28