<?php



function foo()

{

  var_dump(debug_backtrace());

}



foo();



?>





Output

---------------------------------------------------------------

array(1) {

  [0]=>

  array(4) {

    ["file"]=>

    string(67) "/Users/nnguyen/Downloads/apache-tomcat-6.0.29/webapps/ROOT/test.php"

    ["line"]=>

    int(9)

    ["function"]=>

    string(3) "foo"

    ["args"]=>

    array(0) {

    }

  }

}