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<?php trait AccessibleProperties { public function __isset($property) { return property_exists($this, $property); } public function __get($property) { if (property_exists($this, $property)) { return $this->$property; } } } class Foo4567 { use AccessibleProperties; protected $a = 'Some value'; } class Foo45 { use AccessibleProperties; protected $a = 'Some value'; } $foo = new Foo4567; var_dump(isset($foo->a)); $foo = new Foo45; var_dump($foo->a);
Output for 5.6.38, 7.0.33, 7.1.25, 7.2.0 - 7.2.33, 7.3.1 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
bool(true) string(10) "Some value"
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 7.3.0
bool(false) Fatal error: Uncaught Error: Cannot access protected property Foo45::$a in /in/GJLkJ:29 Stack trace: #0 {main} thrown in /in/GJLkJ on line 29
Process exited with code 255.
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