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run code in 150+ php & hhvm versions
Bugs & Features
<?php class PropertyTest { /** Location for overloaded data. */ private $data = array(); /** Overloading not used on declared properties. */ public $declared = 1; /** Overloading only used on this when accessed outside the class. */ private $hidden = 2; public function __set($name, $value) { echo "Setting '$name' to '$value'\n"; $this->data[$name] = $value; } public function __get($name) { echo "Getting '$name'\n"; if (array_key_exists($name, $this->data)) { return $this->data[$name]; } $trace = debug_backtrace(); trigger_error( 'Undefined property via __get(): ' . $name . ' in ' . $trace[0]['file'] . ' on line ' . $trace[0]['line'], E_USER_NOTICE); return null; } /** As of PHP 5.1.0 */ public function __isset($name) { echo "Is '$name' set?\n"; return isset($this->data[$name]); } /** As of PHP 5.1.0 */ public function __unset($name) { echo "Unsetting '$name'\n"; unset($this->data[$name]); } /** Not a magic method, just here for example. */ public function getHidden() { return $this->hidden; } } echo "<pre>\n"; $obj = new PropertyTest; $obj->a = 1; echo $obj->a . "\n\n"; var_dump(isset($obj->a)); unset($obj->a); var_dump(isset($obj->a)); echo "\n"; echo $obj->declared . "\n\n"; echo "Let's experiment with the private property named 'hidden':\n"; echo "Privates are visible inside the class, so __get() not used...\n"; echo $obj->getHidden() . "\n"; echo "Privates not visible outside of class, so __get() is used...\n"; echo $obj->hidden . "\n"; ?>
Output for 5.1.0 - 7.1.0
<pre> Setting 'a' to '1' Getting 'a' 1 Is 'a' set? bool(true) Unsetting 'a' Is 'a' set? bool(false) 1 Let's experiment with the private property named 'hidden': Privates are visible inside the class, so __get() not used... 2 Privates not visible outside of class, so __get() is used... Getting 'hidden' Notice: Undefined property via __get(): hidden in /in/FjgP9 on line 75 in /in/FjgP9 on line 31
Output for 5.0.0 - 5.0.5
<pre> Setting 'a' to '1' Getting 'a' 1 bool(false) bool(false) 1 Let's experiment with the private property named 'hidden': Privates are visible inside the class, so __get() not used... 2 Privates not visible outside of class, so __get() is used... Fatal error: Cannot access private property PropertyTest::$hidden in /in/FjgP9 on line 75
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/FjgP9 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/FjgP9 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/FjgP9 on line 5
Process exited with code 255.