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<?php trait Singleton { private static $instance; private function __construct() {} private function __clone() {} private function __wakeup() {} public function getInstance() { if (empty(static::$instanse)) { return new static(); } else { return static::$instance; } } } class Foo { use Singleton; private $bar; public function incBar() { $this->bar++; } public function getBar() { return $this->bar."<br/>"; } } $foo = Foo::getInstance(); echo $foo->getBar(); $foo->incBar(); echo $foo->getBar();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: The magic method Singleton::__wakeup() must have public visibility in /in/Y0p7Z on line 9 Fatal error: Uncaught Error: Non-static method Foo::getInstance() cannot be called statically in /in/Y0p7Z:38 Stack trace: #0 {main} thrown in /in/Y0p7Z on line 38
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: The magic method Singleton::__wakeup() must have public visibility in /in/Y0p7Z on line 9 Fatal error: Uncaught Error: Non-static method Foo::getInstance() cannot be called statically in /in/Y0p7Z:38 Stack trace: #0 {main} thrown in /in/Y0p7Z on line 38
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
Deprecated: Non-static method Foo::getInstance() should not be called statically in /in/Y0p7Z on line 38 <br/>1<br/>
Output for 7.3.32 - 7.3.33
<br/>1<br/>
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Strict Standards: Non-static method Foo::getInstance() should not be called statically in /in/Y0p7Z on line 38 <br/>1<br/>
preferences:
119.41 ms | 402 KiB | 182 Q