[Reprint]php Array Class object value pass Reference pass Difference

The General data type (int, float, bool) does not explain this.

Here is a detailed description of the difference between an array and the object of a class as a parameter for value passing

Array value passing

Instance code:

<?php function Main () {        $cc = array (            ' A ', ' B '        );        Change ($CC);        Var_dump ($CC);        Die;} function Change ($CC) {        $cc = array (' DD ');} Main ();? >

　　output:

　　array(2) {   　　 [0]=>   　　 string (1) "a"   　　 [1]=>   　　 string (1) "b" 　　}

Array reference passing

<?php function Main () {        $cc = array (            ' A ', ' B '        );        Change ($CC);        Var_dump ($CC);        Die;} Function Change (& $CC) {        $cc = array (' DD ');} Main ();? >

Outpout:array (1) {  [0]=>  string (2) "DD"}

Class Object Value passing

<?phpclass pp{public        $ss = 0;} function Main () {        $p = new pp ();        Change ($p);        Var_dump ($p);        Die;} function Change ($p) {        $p->ss = 10;} Main ();? >

Output:object (PP) #1 (1) {  ["ss"]=>  Int (10)}

Class object reference passing

<?phpclass pp{public        $ss = 0;} function Main () {        $p = new pp ();        Change ($p);        Var_dump ($p);        Die;} Function Change (& $p) {        $p->ss = 10;} Main ();? >

Object (PP) #1 (1) {  ["ss"]=>  Int (10)}

Summary: In PHP, an array is a normal variable, and the value is passed as a copy of the argument, regardless of the argument, and the value of the argument can be changed after the reference is passed.
The object of a class is that the value of the argument is changed regardless of whether the value is passed or the reference pass is a reference pass, and is a reference to the object.

Transferred from: http://www.cnblogs.com/zcy_soft/archive/2011/12/10/2283570.html

[Reprint]php Array Class object value passing reference passing differences