PHP获取指定函数定义在哪个文件中及行号

function function_dump($funcname) {
try {
if(is_array($funcname)) {
$func = new ReflectionMethod($funcname[0], $funcname[1]);
$funcname = $funcname[1];
} else {
$func = new ReflectionFunction($funcname);
}
} catch (ReflectionException $e) {
echo $e->getMessage();
return;
} www.jbxue.com
$start = $func->getStartLine() - 1;
$end =  $func->getEndLine() - 1;
$filename = $func->getFileName();
echo "function $funcname defined by $filename($start - $end)\n";
}