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<?php class With_Magic_Methods { private $_prop = array(); protected $compat_fields = array( '_prop' ); public function __get( $name ) { if ( in_array( $name, $this->compat_fields, true ) ) { return $this->$name; } } public function __set( $name, $value ) { if ( in_array( $name, $this->compat_fields, true ) ) { return $this->$name = $value; } } public function __isset( $name ) { if ( in_array( $name, $this->compat_fields, true ) ) { return isset( $this->$name ); } return false; } public function __unset( $name ) { if ( in_array( $name, $this->compat_fields, true ) ) { unset( $this->$name ); } } } class No_Magic_Methods { public $_prop = array(); } function run_test() { $with_magic_methods = new With_Magic_Methods(); $no_magic_methods = new No_Magic_Methods(); echo "** Test `__get()` **\n"; echo "With magic methods: "; var_dump( $with_magic_methods->_prop ); echo "No magic methods: "; var_dump( $no_magic_methods->_prop ); echo "\n\n ** Test `__isset()` **\n"; echo "With magic methods: "; var_dump( isset( $with_magic_methods->_prop ) ); echo "No magic methods: "; var_dump( isset( $no_magic_methods->_prop ) ); echo "\n\n ** Test `__set()` **\n"; $new_value = array( 'test' ); $with_magic_methods->_prop = $new_value; $no_magic_methods->_prop = $new_value; echo "With magic methods: "; var_dump( $with_magic_methods->_prop ); echo "No magic methods: "; var_dump( $no_magic_methods->_prop ); echo "\n\n ** Test `__isset()` after an `__unset()` **\n"; unset( $with_magic_methods->_prop ); unset( $no_magic_methods->_prop ); echo "With magic methods:"; var_dump( isset( $with_magic_methods->_prop ) ); echo "No magic methods: "; var_dump( isset( $no_magic_methods->_prop ) ); echo "\n\n ** Test `__get()` after an __unset() **\n"; echo "With magic methods:"; var_dump( $with_magic_methods->_prop ); echo "No magic methods: "; var_dump( $no_magic_methods->_prop ); echo "\n\n ** Test `__set()` after an __unset() **\n"; $new_value = array( 'test after an unset' ); $with_magic_methods->_prop = $new_value; $no_magic_methods->_prop = $new_value; echo "With magic methods:"; var_dump( $with_magic_methods->_prop ); echo "No magic methods: "; var_dump( $no_magic_methods->_prop ); } run_test();