Revisions to Hidden Features of PHP? [closed]

added paragraph about interfaces which overload operators

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edited Aug 28, 2010 at 8:58

NikiC

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Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

interface AllMagicMethods {
    // accessing undefined or invisible (e.g. private) properties
    public function __get($fieldName);
    public function __set($fieldName, $value);
    public function __isset($fieldName);
    public function __unset($fieldName);

    // calling undefined or invisible (e.g. private) methods
    public function __call($funcName, $args);
    public static function __callStatic($funcName, $args); // as of PHP 5.3

    // on serialize() / unserialize()
    public function __sleep();
    public function __wakeup();

    // conversion to string (e.g. with (string) $obj, echo $obj, strlen($obj), ...)
    public function __toString();

    // calling the object like a function (e.g. $obj($arg, $arg2))
    public function __invoke($arguments, $...);

    // called on var_export()
    public static function __set_state($array);
}

A C++ developer here might notice, that PHP allows overloading some operators, e.g. () or (string). Actually PHP allows overloading even more, for example the [] operator (ArrayAccess), the foreach language construct (Iterator and IteratorAggregate) and the count function (Countable).

Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

interface AllMagicMethods {
    // accessing undefined or invisible (e.g. private) properties
    public function __get($fieldName);
    public function __set($fieldName, $value);
    public function __isset($fieldName);
    public function __unset($fieldName);

    // calling undefined or invisible (e.g. private) methods
    public function __call($funcName, $args);
    public static function __callStatic($funcName, $args); // as of PHP 5.3

    // on serialize() / unserialize()
    public function __sleep();
    public function __wakeup();

    // conversion to string (e.g. with (string) $obj, echo $obj, strlen($obj), ...)
    public function __toString();

    // calling the object like a function (e.g. $obj($arg, $arg2))
    public function __invoke($arguments, $...);

    // called on var_export()
    public static function __set_state($array);
}

Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

interface AllMagicMethods {
    // accessing undefined or invisible (e.g. private) properties
    public function __get($fieldName);
    public function __set($fieldName, $value);
    public function __isset($fieldName);
    public function __unset($fieldName);

    // calling undefined or invisible (e.g. private) methods
    public function __call($funcName, $args);
    public static function __callStatic($funcName, $args); // as of PHP 5.3

    // on serialize() / unserialize()
    public function __sleep();
    public function __wakeup();

    // conversion to string (e.g. with (string) $obj, echo $obj, strlen($obj), ...)
    public function __toString();

    // calling the object like a function (e.g. $obj($arg, $arg2))
    public function __invoke($arguments, $...);

    // called on var_export()
    public static function __set_state($array);
}

A C++ developer here might notice, that PHP allows overloading some operators, e.g. () or (string). Actually PHP allows overloading even more, for example the [] operator (ArrayAccess), the foreach language construct (Iterator and IteratorAggregate) and the count function (Countable).

added 351 characters in body

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edited Aug 28, 2010 at 8:53

NikiC

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Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

interface AllMagicMethods {
    // overloadingaccessing undefined or invisible (e.g. private) properties
    public function __get($fieldName);
    public function __set($fieldName, $value);
    public function __isset($fieldName);
    public function __unset($fieldName); 

    // calling undefined or invisible (e.g. private) methods
    public function __call($funcName, $args);
    public static function __callStatic($funcName, $args); // as of PHP 5.3

    // moreon magicserialize() / unserialize()
    public function __sleep();
    public function __wakeup();

    // conversion to string (e.g. with (string) $obj, echo $obj, strlen($obj), ...)
    public function __toString();

    // calling the object like a function (e.g. $obj($arg, $arg2))
    public function __invoke($arguments, $...);

    // called on var_export()
    public static function __set_state($array);
}

Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

interface AllMagicMethods {
    // overloading
    public function __get($fieldName);
    public function __set($fieldName, $value);
    public function __isset($fieldName);
    public function __unset($fieldName);

    public function __call($funcName, $args);
    public static function __callStatic($funcName, $args); // as of PHP 5.3

    // more magic
    public function __sleep();
    public function __wakeup();
    public function __toString();
    public function __invoke();
    public static function __set_state($array);
}

Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

interface AllMagicMethods {
    // accessing undefined or invisible (e.g. private) properties
    public function __get($fieldName);
    public function __set($fieldName, $value);
    public function __isset($fieldName);
    public function __unset($fieldName); 

    // calling undefined or invisible (e.g. private) methods
    public function __call($funcName, $args);
    public static function __callStatic($funcName, $args); // as of PHP 5.3

    // on serialize() / unserialize()
    public function __sleep();
    public function __wakeup();

    // conversion to string (e.g. with (string) $obj, echo $obj, strlen($obj), ...)
    public function __toString();

    // calling the object like a function (e.g. $obj($arg, $arg2))
    public function __invoke($arguments, $...);

    // called on var_export()
    public static function __set_state($array);
}

reformat code

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edited Aug 28, 2010 at 8:48

NikiC

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Magic MethodsMagic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

classinterface XAllMagicMethods {
    // overloading
    public function __get($fieldName) { ... };
     public function __set($fieldName, $value);
 { ... } public function __isset($fieldName);
    public function __unset($fieldName);

    public function __call($funcName, $args);
 { ..  public static function __callStatic($funcName, $args); // as of PHP 5.3

 }   // more magic
    public function __sleep();
    public function __wakeup();
    public function __toString();
 { ... } public function __invoke();
    public static function __set_state($array);
}

Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

class X {
     public function __get($fieldName) { ... }
     public function __set($fieldName, $value) { ... }
     public function __call($funcName, $args) { ... }
     public function __toString() { ... }
}

Magic Methods are fall-through methods that get called whenever you invoke a method that doesn't exist or assign or read a property that doesn't exist, among other things.

interface AllMagicMethods {
    // overloading
    public function __get($fieldName);
    public function __set($fieldName, $value);
    public function __isset($fieldName);
    public function __unset($fieldName);

    public function __call($funcName, $args);
    public static function __callStatic($funcName, $args); // as of PHP 5.3

    // more magic
    public function __sleep();
    public function __wakeup();
    public function __toString();
    public function __invoke();
    public static function __set_state($array);
}

type $vlaue ~~> $value

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edited Jan 9, 2010 at 6:04

micahwittman

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Changed $fieldName to $funName in __call() method

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edited Dec 26, 2009 at 18:05

pix0r

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Post Made Community Wiki

occurred May 1, 2009 at 8:20

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answered Sep 14, 2008 at 17:21

Allain Lalonde

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