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<?php trait DataCollector { static $collectionData = array(); final private function setData( $data ) { self::$CollectionData[] = $data; return $this; } public function getCollectedData() { return self::$CollectionData; } } class Form {} class Field extends Form { use DataCollector; public function __construct( $type, $text = NULL ) { $this->setData( $type )->setData( $text ); } } $Field1 = new Field( 'text' ); var_dump( $Field1->getCollectedData() ); $Field2 = new Field( 'html', 'hello' ); var_dump( $Field2->getCollectedData() );
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.1, 8.3.3 - 8.3.7
Warning: Private methods cannot be final as they are never overridden by other classes in /in/MUBQu on line 5 Fatal error: Uncaught Error: Access to undeclared static property Field::$CollectionData in /in/MUBQu:6 Stack trace: #0 /in/MUBQu(21): Field->setData('text') #1 /in/MUBQu(25): Field->__construct('text') #2 {main} thrown in /in/MUBQu on line 6
Process exited with code 255.
Output for 8.3.2
Warning: Private methods cannot be final as they are never overridden by other classes in /in/MUBQu on line 5 Warning: Private methods cannot be final as they are never overridden by other classes in /in/MUBQu on line 17 Fatal error: Uncaught Error: Access to undeclared static property Field::$CollectionData in /in/MUBQu:6 Stack trace: #0 /in/MUBQu(21): Field->setData('text') #1 /in/MUBQu(25): Field->__construct('text') #2 {main} thrown in /in/MUBQu on line 6
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Access to undeclared static property: Field::$CollectionData in /in/MUBQu:6 Stack trace: #0 /in/MUBQu(21): Field->setData('text') #1 /in/MUBQu(25): Field->__construct('text') #2 {main} thrown in /in/MUBQu on line 6
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Fatal error: Access to undeclared static property: Field::$CollectionData in /in/MUBQu on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/MUBQu on line 2
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/MUBQu on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/MUBQu on line 2
Process exited with code 255.
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