php适用函数
php实用函数
常常会需要当经常会忘记，还是记下来吧
get_defined_vars
返回由所有已定义变量所组成的数组?
?
get_defined_constants
返回由所有已定义常量所组成的数组?
?
get_defined_functions
返回由所有已定义的函数所组成的数组?
?
get_declared_classes
返回由所有已定义的类所组成的数组?
?
sys_get_temp_dir
获取临时目录
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