How To Debug Execution Path in PHP��Equivalent of printStackTrace() in Java �� ̿� ��ϴ� ��ο� php�� ϴ� �� printStackTrace�� ()�� ڹ�

Angsuman Chakraborty angsuman Chakraborty��

March 1st, 2007 2007�� 3�� 1��

While programming in PHP often you will find that a simple echo or log statement is not sufficient. ��α׷�� php ��ϴ� �� Ǵ� �α�� ˰Ե˴ϴ� �� մϴ�. You have found out where a problem is happening but you have no clue why it is executing that code in the first place. �� ߰�� Ͼ�� ׷�� ƹ� �ܼ�� ó�� ڵ带 ��մϴ�. This is where execution path comes in handy. �̰�� θ� �� մϴ�. With a simple call you can display the whole execution path of the code so far, every function that was executed, in which file and in which line number. �ִ� �� ȭ �ڵ�� θ� ǥ�� ֽ��ϴ� ��ݱ�� , �� Ǹ� �� ȣ��ִ� ��մϴ�. Isn't that handy? �׷�� ڵ�?

Use debug_print_backtrace() to print the full execution path of the code upto that point. �� debug_print_backtrace ()�� μ��մϴ� �� ü �ڵ�� մϴ�. You can also use debug_backtrace() which returns an associative array with the following data: �� ֽ��ϴ� debug_backtrace ()�� ͸� �� 迭�� ȯ�մϴ� :
Possible returned elements from debug_backtrace() ��ȯ�� Ҹ� ��ֽ��ϴ� debug_backtrace ()

Name �̸�	Type ��	Description ��
function �Լ�	string ��ڿ�	The current function name. �� Լ� �̸�. See also �� __FUNCTION__. __function__�մϴ�.
line ��	integer ��	The current line number. �� ȣ�մϴ�. See also �� __LINE__. __line__�մϴ�.
file ��	string ��ڿ�	The current file name. �� ̸��մϴ�. See also �� __FILE__. __file__�մϴ�.
class Ŭ��	string ��ڿ�	The current class name. �� Ŭ�� ̸�. See also �� __CLASS__ __class__
type ��	string ��ڿ�	The current call type. �� ȭ ��մϴ�. If a method call, "->" is returned. ��쿡�� ޼ҵ� ȣ��, "->"�� ȯ�մϴ�. If a static ��ü�Ǵ� ��쿡�� method call, "::" is returned. �޼�� ȣ��, ": :"�� ȯ�˴ϴ�. If a function call, nothing is returned. �� Լ� ȣ��, �ƹ��͵�� ȯ�˴ϴ�.
args	array �迭	If inside a function, this lists the functions arguments. �� ο�� ,�� μ��մϴ�. If �� inside an included file, this lists the included file name(s). ��ο� ��Ե� ��,�� Ͽ� ��Ե� �� ̸� (��).