<?php function test5(){ function test6(){ echo 'this is test6'; return 888; } echo 123; return test6(); } test5(); echo '<hr />'; var_dump(test5());
上面这段代码报错:
Fatal error: Cannot redeclare test6() (previously declared in E:\xampp\htdocs\test\testecho.php:4) in E:\xampp\htdocs\test\testecho.php on line 4
重复定义了test6函数了
把var_dump(test5())去掉即可
调用了test5后 可以直接调用test6
函数不能嵌套
不太清楚