Trace¶
A trace is the list of called functions during an execution. It lists all the code that was executed, and helps with debugging.
In PHP, a trace is automatically calculated with an exception, or the function debug_backtrace(). This shows the stack trace at the error point.
Other tools, like xDebug or php-trace, build the callgraph over the execution of the whole code, not only on errors.
<?php
function c() {
throw new Exception(Something went wrong);
}
function a() { b(); }
function b() { c(); }
a();
/**
Fatal error: Uncaught Exception: Something went wrong in file.php:3
Stack trace:
#0 file.php(7): c()
#1 file.php(11): b()
#2 file.php(14): a()
#3 {main}
*/
?>
See also Chris-Kol/php-trace.
Related : debug_backtrace(), Audit Trail, Xdebug, Flame Graph, Monitoring, Troubleshoot
