How To Debug Execution Path in PHP…Equivalent of printStackTrace() in Java �� . ��. ��… �� printstacktrace ((��

Angsuman Chakraborty ��

March 1st, 2007 �� 2007

While programming in PHP often you will find that a simple echo or log statement is not sufficient. ��. ��. �� . You have found out where a problem is happening but you have no clue why it is executing that code in the first place. �� . This is where execution path comes in handy. �� . 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. �� . Isn't that handy? �� Ͽ

Use debug_print_backtrace() to print the full execution path of the code upto that point. �� debug_print_backtrace () �� upto �� . You can also use debug_backtrace() which returns an associative array with the following data: �� debug_backtrace () �� :
Possible returned elements from debug_backtrace() �� debug_backtrace ()

Name ��	Type ��	Description ��
function ��	string ��	The current function name. �� . See also �� __FUNCTION__. __function__.
line ��	integer ��	The current line number. �� . See also �� __LINE__. __line__.
file ��	string ��	The current file name. �� . See also �� __FILE__. __file__.
class ��	string ��	The current class name. �� . See also �� __CLASS__ __class__
type ��	string ��	The current call type. �� . If a method call, "->" is returned. �� "-->" �� . If a static �� method call, "::" is returned. �� ": :" �� . If a function call, nothing is returned. �� .
args	array ��	If inside a function, this lists the functions arguments. �� . If �� inside an included file, this lists the included file name(s). �� (�).