IT工程師數位筆記本

1 <?php
2 class apple {
3     function get_info() {
4         echo "this is A apple";
5     }
6 }

1 <?php
2 class apple {
3     function get_info() {
4         echo "this is A apple";
5     }
6 }

1 <?php
2 require_once('a.php');
3 require_once('b.php');
4 
5 $apple = new apple();
6 $apple->get_info();

1 Fatal error: Cannot redeclare class apple in D:\phpStudy\WWW\namespace\b.php on line 3

1 <?php
2 namespace a\b\c;
3 class apple {
4     function get_info() {
5         echo "this is A apple";
6     }
7 }

1 namespace d\e\f;
2 class apple{
3      function get_info() {
4         echo "this is B apple";
5     }
6 }

1 <?php
2 require_once('a.php');
3 require_once('b.php');
4 
5 use a\b\c\apple;
6 
7 $apple = new apple();
8 $apple->get_info();

1 this is A apple

 1 <?php
 2 require_once('a.php');
 3 require_once('b.php');
 4 
 5 use a\b\c\apple;
 6 use d\e\f\apple ;
 7 
 8 $apple = new apple();
 9 $apple->get_info();
10 
11 echo "<br>";
12 
13 $bapple = new apple();
14 $bapple->get_info();

Fatal error: Cannot use d\e\f\apple as apple because the name is already in use in D:\phpStudy\WWW\namespace\index.php on line 6

 1 <?php
 2 require_once('a.php');
 3 require_once('b.php');
 4 
 5 use a\b\c\apple;
 6 use d\e\f\apple as Bapple ;
 7 
 8 $apple = new apple();
 9 $apple->get_info();
10 
11 echo "<br>";
12 
13 $bapple = new Bapple();
14 $bapple->get_info();

this is A apple
this is B apple

1 <?php
2 class apple{
3     function get_info(){
4         echo "this is c apple";
5     }
6 }

 1 <?php
 2 require_once('a.php');
 3 require_once('b.php');
 4 require_once('c.php');
 5 
 6 use a\b\c\apple;
 7 use d\e\f\apple as Bapple ;
 8 
 9 $apple = new apple();
10 $apple->get_info();
11 
12 echo "<br>";
13 
14 $bapple = new Bapple();
15 $bapple->get_info();
16 
17 echo "<br>";
18 
19 $capple = new \apple();
20 $capple->get_info();

this is A apple
this is B apple
this is c apple