php 調試列印堆棧

<?php// filename: /tmp/a.phpfunction a_test($str){    echo "\nHi: $str";    var_dump(debug_backtrace());}a_test('friend');?>

<?php// filename: /tmp/b.phpinclude_once '/tmp/a.php';?>

結果

Hi: friendarray(2) {[0]=>array(4) {    ["file"] => string(10) "/tmp/a.php"    ["line"] => int(10)    ["function"] => string(6) "a_test"    ["args"]=>    array(1) {      [0] => &string(6) "friend"    }}[1]=>array(4) {    ["file"] => string(10) "/tmp/b.php"    ["line"] => int(2)    ["args"] =>    array(1) {      [0] => string(10) "/tmp/a.php"    }    ["function"] => string(12) "include_once"  }}

