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run code in 150+ php & hhvm versions
Bugs & Features
<?php class DataCollector { private static $CollectionData = array(); private static function collectedData( $type, $value = NULL ) { if( strtolower( $type ) === 'set' ) { $CollectionData[] = $value; var_dump($CollectionData); } elseif( strtolower( $type ) === 'get' ) return self::$CollectionData; } } trait setData { static function setData( $data ) { DataCollector::collectedData( 'set', $data ); } } trait dataHandler { static function getCollectedData() { DataCollector::collectedData( 'get' ); } } class Form { use setData {} } class Field extends Form { public function __construct( $type, $text = NULL ) { DataCollector::setData( $type ); } } class A { use setData{} public function __construct( $type, $text = NULL ) { self::setData( $type ); } } $Field1 = new Field( '1' ); $Field2 = new Field( '2' ); $A = new A( '3' ); DataCollector::setData('4'); dataHandler::setData('5'); var_dump( dataHandler::getCollectedData() );
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Call to undefined method DataCollector::setData() in /in/tMA60:31 Stack trace: #0 /in/tMA60(43): Field->__construct('1') #1 {main} thrown in /in/tMA60 on line 31
Process exited with code 255.
Output for 5.4.0 - 5.6.28, hhvm-3.12.0
Fatal error: Call to undefined method DataCollector::setData() in /in/tMA60 on line 31
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/tMA60 on line 15
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/tMA60 on line 15
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/tMA60 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/tMA60 on line 3
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/tMA60 on line 3
Process exited with code 255.