Example PHP array-type access interface arrayaccess

This article mainly introduces the PHP array-type Access interface arrayaccess usage, combined with the example form analysis of the array-type access interface arrayaccess concept, function, implementation and use of the method, the need for friends can refer to, hope to help everyone.

This example describes the PHP array-style access interface arrayaccess usage. Share to everyone for your reference, as follows:

The PHP arrayaccess interface is also called an array-style access interface that provides the ability to access an object like an array.

The interface summary is as follows:

arrayaccess {  //Get an offset position value  abstract public mixed offsetget (mixed $offset)  //Set an offset value for  abstract publ IC void Offsetset (mixed $offset, mixed $value)  //Check an offset position for the presence of an  abstract public boolean offsetexists (mixed $o Ffset)  //reset value of an offset position  abstract public void Offsetunset (mixed $offset)}

Example Description:

<?php/*** arrayandobjectaccess* This class allows access as an array or an object * * @author crazy old driver */class Arrayandobjectaccess implements  arrayaccess {/** * defines an array to hold the data * * @access private * @var array */private $data = []; /** * Accessing data in an array as an object * * @access public * @param string array element Key Name */Public Function __get ($key) {return $this-  >data[$key]; }/** * Add an array element as an object * * @access public * @param string array element key Name * @param mixed array element value * @return Mixed */PU  Blic function __set ($key, $value) {$this->data[$key] = $value; /** * Determines whether an array element is set in object mode * * @access public * @param array element Key Name * @return Boolean/Public function __isset ($key  ) {return isset ($this->data[$key]); /** * Delete an array element as an object * * @access public * @param array element Key Name */Public Function __unset ($key) {unset ($this-&gt  ;d ata[$key]); }/** * Adds an array of elements to the data array * * @access public * @abstracting arrayaccess * @param string offset position * @param mixed Element value */Public function OffsetseT ($offset, $value) {if (Is_null ($offset)) {$this->data[] = $value;    } else {$this->data[$offset] = $value;   }}/** * Array to get data array specified position element * * @access public * @abstracting arrayaccess * @param offset position * @return Mixed  */Public Function Offsetget ($offset) {return $this->offsetexists ($offset)? $this->data[$offset]: null;  /** * Array to determine if the offset position element is set * * @access public * @abstracting arrayaccess * @param offset Position * @return Boolean */  Public Function offsetexists ($offset) {return isset ($this->data[$offset]); }/** * Delete data array by array specify position element * * @access public * @abstracting arrayaccess * @param offset position */Public function O    Ffsetunset ($offset) {if ($this->offsetexists ($offset)) {unset ($this->data[$offset]); }}} $animal = new arrayandobjectaccess (); $animal->dog = ' dog '; Call arrayandobjectaccess::__set$animal[' pig '] = ' pig '; Call Arrayandobjectaccess::offsetsetvar_dump (Isset ($animal->dog)); // Call Arrayandobjectaccess::__issetvar_dump (Isset ($animal [' pig ']); Call Arrayandobjectaccess::offsetexistsvar_dump ($animal->pig); Call Arrayandobjectaccess::__getvar_dump ($animal [' dog ']); Call Arrayandobjectaccess::offsetgetunset ($animal [' dog ']); Call Arrayandobjectaccess::offsetunsetunset ($animal->pig); Call Arrayandobjectaccess::__unsetvar_dump ($animal [' pig ']); Call Arrayandobjectaccess::offsetgetvar_dump ($animal->dog); Call arrayandobjectaccess::__get?>

Above output:

Boolean true
Boolean true
String ' Pig ' (length=3)
String ' dog ' (length=3)
Null
Null