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<?php class Check { private static $instance; public function getInstance($name) { if (isset(self::$instance)) { return self::$instance; } self::$instance = $name; return self::$instance; } } $a = new Check; var_dump($a->getInstance('a')); $b = new Check; var_dump($b->getInstance('b')); var_dump($a->getInstance());
Output for 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 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
string(1) "a" string(1) "a" Fatal error: Uncaught ArgumentCountError: Too few arguments to function Check::getInstance(), 0 passed in /in/6Pjsv on line 26 and exactly 1 expected in /in/6Pjsv:7 Stack trace: #0 /in/6Pjsv(26): Check->getInstance() #1 {main} thrown in /in/6Pjsv on line 7
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, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
string(1) "a" string(1) "a" Warning: Missing argument 1 for Check::getInstance(), called in /in/6Pjsv on line 26 and defined in /in/6Pjsv on line 7 string(1) "a"
Output for 5.0.0 - 5.0.5
string(1) "a" string(1) "a" Warning: Missing argument 1 for Check::getInstance() in /in/6Pjsv on line 7 string(1) "a"
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/6Pjsv 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/6Pjsv 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/6Pjsv on line 5
Process exited with code 255.
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