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<?php class PHPApprentice { private static $velocity = ''; private static $initialized = false; public static function initialize () { if ( self::initialized ) return; self::$initialized = true; self::$velocity = 'fast!'; } public static function getVelocity () { self::initialize(); return self::$velocity; } public static function setVelocity ( $value ) { self::$velocity = $value; } } PHPApprentice::setVelocity ( 'Ludicrous Speed!!' ); echo PHPApprentice::getVelocity();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Fatal error: Uncaught Error: Undefined constant PHPApprentice::initialized in /in/b3ZL4:9 Stack trace: #0 /in/b3ZL4(18): PHPApprentice::initialize() #1 /in/b3ZL4(28): PHPApprentice::getVelocity() #2 {main} thrown in /in/b3ZL4 on line 9
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Error: Undefined class constant 'initialized' in /in/b3ZL4:9 Stack trace: #0 /in/b3ZL4(18): PHPApprentice::initialize() #1 /in/b3ZL4(28): PHPApprentice::getVelocity() #2 {main} thrown in /in/b3ZL4 on line 9
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28
Fatal error: Undefined class constant 'initialized' in /in/b3ZL4 on line 9
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/b3ZL4 on line 4
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/b3ZL4 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/b3ZL4 on line 4
Process exited with code 255.
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