我有以下代码:
function abcdef() { }
function test($callback) {
// I need the function name string("abcdef") here?
}
test(abcdef);
是否可以在测试函数中获取函数名称?那么匿名函数呢?
之前有人问过这个问题:如何在 PHP 中获取被调用者?
您可以使用debug_backtace获得所需的信息。这是我发现的一个非常干净的功能:
<?php
/**
* Gets the caller of the function where this function is called from
* @param string what to return? (Leave empty to get all, or specify: "class", "function", "line", "class", etc.) - options see: http://php.net/manual/en/function.debug-backtrace.php
*/
function get_caller($what = NULL)
{
$trace = debug_backtrace();
$previousCall = $trace[2]; // 0 is this call, 1 is call in previous function, 2 is caller of that function
if(isset($what)) {
return $previousCall[$what];
} else {
return $previousCall;
}
}
你(可能)像这样使用它:
<?php
function foo($full)
{
if ($full) {
return var_export(get_caller(), true);
} else {
return 'foo called from ' . get_caller('function') . PHP_EOL;
}
}
function bar($full = false)
{
return foo($full);
}
echo bar();
echo PHP_EOL;
echo bar(true);
返回:
foo called from bar
array (
'file' => '/var/www/sentinel/caller.php',
'line' => 31,
'function' => 'bar',
'args' =>
array (
0 => true,
),
)
您可以尝试使用 function.name :
function abcdef() { }
function test($callback) {
alert($callback.name)
}
test(abcdef);