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<?php class GenericCollection { private $className; private $items = []; public function __construct($className) { if (!class_exists($className)) { throw new \LogicException('Invalid class name: ' . $className); } $this->className = $className; } private function checkItemIsInstanceOfCorrectClass($item) { if (!$item instanceof $this->className) { throw new \LogicException('Items in this collection must be instances of ' . $this->className); } } public function getClassName() { return $this->className; } public function push($item) { $this->checkItemIsInstanceOfCorrectClass($item); array_push($this->items, $item); } public function unshift($item) { $this->checkItemIsInstanceOfCorrectClass($item); array_unshift($this->items, $item); } // other collection methods } class Foo {} class Bar {} $col = new GenericCollection(Foo::class); $col->push(new Foo); // works $col->push(new Bar); // exception
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught LogicException: Items in this collection must be instances of Foo in /in/LbDW5:21 Stack trace: #0 /in/LbDW5(32): GenericCollection->checkItemIsInstanceOfCorrectClass(Object(Bar)) #1 /in/LbDW5(50): GenericCollection->push(Object(Bar)) #2 {main} thrown in /in/LbDW5 on line 21
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Uncaught exception 'LogicException' with message 'Items in this collection must be instances of Foo' in /in/LbDW5:21 Stack trace: #0 /in/LbDW5(32): GenericCollection->checkItemIsInstanceOfCorrectClass(Object(Bar)) #1 /in/LbDW5(50): GenericCollection->push(Object(Bar)) #2 {main} thrown in /in/LbDW5 on line 21
Process exited with code 255.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/LbDW5 on line 48
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/LbDW5 on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/LbDW5 on line 7
Process exited with code 255.
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/LbDW5 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/LbDW5 on line 5
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/LbDW5 on line 5
Process exited with code 255.
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