php模块的调试

python里面有这样的用法

#a.py
if __name__ == "__main__":
    print "test"
    //只有直接python a.py 才会打印test

意思就是当前脚本独立运行时，才会运行print “test”,这在编写模块，并被其他程序调用时，可以用来调试。 php中没有对应的，今天想起来可以这样做：

//a.php
if(count(get_included_files()) == 1){
    //This file is not included by other script!
   //Do some test here
    _test(); 
    //只有直接访问 a.php 时才会执行_test()
    //如果b.php中 include("a.php"),则不会执行到 _test()
    //达到了和python中的同样效果
}

关于get_included_files, 请参考[这里](http://cn2.php.net/manual/en/function.get- included-files.php)

array get_included_files ( void ) Gets the names of all files that have been included using include(), include_once(), require() or require_once().