This function returns an object of class DomDocumentType. In versions of PHP before 4.3 this has been the class Dtd, but the DOM Standard does not know such a class.

ד 1. Class association

COM class constructor. Parameters

If obj is an object, returns the name of the parent class of the class of which obj is an instance.

This function returns TRUE if the object is of this class or has this class as one of its parents, FALSE otherwise.

ד 1. Overloading a PHP class

If obj is a string, returns the name of the parent class of the class with that name. This functionality was added in PHP 4.0.5.

See also the methods of class DomDocumentType.

name or class id of the requested component.

In this example, we first define a base class and an extension of the class. The base class describes a general vegetable, whether it is edible or not and what is its color. The subclass Spinach adds a method to cook it and another to find out if it is cooked.

It is strongly recommended that you include the class definitions of all such registered objects on all of your pages, even if you do not actually use these classes on all of your pages. If you don't and an object is being unserialized without its class definition being present, it will lose its class association and become an object of class stdClass without any functions available at all, that is, it will become quite useless.

An Association is a composition of independently constructed and externally visible parts. When we associate classes or objects, each one keeps a reference to the ones it is associated with. When we associate classes statically, one class will contain a reference to an instance of the other class. For example

This function returns the name of the class of which the object obj is an instance. Returns FALSE if obj is not an object.

This function will return an associative array of default properties of the class. The resulting array elements are in the form of varname value.

Will return the aggretaion information for a particular object as an associative array of arrays of methods and properties. The key for the main array is the name of the aggregated class.

We then instantiate 2 objects from these classes and print out information about them, including their class parentage. We also define some utility functions, mainly to have a nice printout of the variables.

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This function returns an associative array of defined object properties for the specified object obj. If variables declared in the class of which the obj is an instance, have not been assigned a value, those will not be returned in the array.

The handling of a backslash followed by a digit other than 0 is complicated. Outside a character class, PCRE reads it and any following digits as a decimal number. If the number is less than 10, or if there have been at least that many previous capturing left parentheses in the expression, the entire sequence is taken as a back reference. A description of how this works is given later, following the discussion of parenthesized subpatterns.

托马斯 潘恩曾经为中产阶级激进主义 middle class radicalism 说话 他说 我们知道 节约劳动力的每一台机器都是我们身为一份子的大家庭的福祉 当然 在技术先进部门会有一些暂时性的失业 但是 长期来看 机器生产可以增加社会的真实财富 从而实现更高工资水平上的充分就业