1--TEST-- 2Closure 032: Testing Closure and debug_backtrace 3--FILE-- 4<?php 5 6function test(closure $a) { 7 $a(23); 8} 9 10 11$c = function($param) { print_r(debug_backtrace()); debug_print_backtrace(); }; 12 13$c(23); 14test($c); 15?> 16--EXPECTF-- 17Array 18( 19 [0] => Array 20 ( 21 [file] => %s 22 [line] => %d 23 [function] => {closure} 24 [args] => Array 25 ( 26 [0] => 23 27 ) 28 29 ) 30 31) 32#0 {closure}(23) called at [%s:%d] 33Array 34( 35 [0] => Array 36 ( 37 [file] => %s 38 [line] => %d 39 [function] => {closure} 40 [args] => Array 41 ( 42 [0] => 23 43 ) 44 45 ) 46 47 [1] => Array 48 ( 49 [file] => %s 50 [line] => %d 51 [function] => test 52 [args] => Array 53 ( 54 [0] => Closure Object 55 ( 56 [parameter] => Array 57 ( 58 [$param] => <required> 59 ) 60 61 ) 62 63 ) 64 65 ) 66 67) 68#0 {closure}(23) called at [%s:%d] 69#1 test(Closure Object ()) called at [%s:%d] 70