Related functions of classes and objects in php

The following editor will bring you a brief discussion of the related functions of classes and objects in PHP. The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor to take a look

class_exists

To determine whether a class exists, the parameter is a name!

interface_exists

To determine whether an interface exists, the parameter is also a name!

method_exists

Determine whether a method exists!

Requires two: the first object variable, the second is a method name! Return a boolean value!

To determine whether a attribute exists, use isset

get_class

Get the class to which the current object belongs!

The parameter is an object!

get_parent_class

Get the parent class name of the object!

get_class_methods

Requires one parameter for a class name and returns an index array with the elements inside It is a collection of method names!

You can get all the public methods of your own and inherited parent classes (static methods and non-static methods can be obtained), but outside the class Cannot get protected and private method names!

get_class_vars

Get all current and inherited public properties of the class! But protected and private property names cannot be obtained outside the class!

is_object

Determine whether a variable is an object!

There are many more of this type, so I won’t introduce them one by one. is_integer is_bool is_float|is_double|is_real is_null is_array is_string is_resource

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