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<?php class Test { protected $have_been_set = array(); public function __set($name, $val) { $this->have_been_set[$name] = TRUE; $this->{$name} = $val; } public function __isset($name) { return array_key_exists($name, $this->have_been_set); } } $t1 = new Test(); $t1->a = null; $t2 = new Test(); var_dump( isSet($t1->a), isSet($t2->a) );
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Deprecated: Creation of dynamic property Test::$a is deprecated in /in/jg0re on line 9 bool(false) bool(false)
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 Deprecated: Creation of dynamic property Test::$a is deprecated in /in/jg0re on line 9 bool(false) bool(false)
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
bool(false) bool(false)
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205.77 ms | 403 KiB | 294 Q