我知道功能debug_backtrace
,但我正在寻找一些现成的功能实现,比如GetCallingMethodName()
?如果它也给出方法的类(如果它确实是一个方法),那将是完美的。
10 回答
最简单的方法是:
echo debug_backtrace()[1]['function'];
该debug_backtrace()
函数是了解这一点的唯一方法,如果你很懒,这是你应该GetCallingMethodName()
自己编写代码的另一个原因。与懒惰作斗争!:D
从 php 5.4 开始,您可以使用
$dbt=debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS,2);
$caller = isset($dbt[1]['function']) ? $dbt[1]['function'] : null;
这不会浪费内存,因为它忽略参数并仅返回最后 2 个回溯堆栈条目,并且不会在此处生成通知作为其他答案。
您还可以使用 php 异常提供的信息,这是一个优雅的解决方案:
函数GetCallingMethodName(){ $e = 新异常(); $trace = $e->getTrace(); //位置 0 将是调用此函数的行,因此我们忽略它 $last_call = $trace[1]; print_r($last_call); } 函数 firstCall($a, $b){ 呼叫($a,$b); } 函数调用($a,$b){ GetCallingMethodName(); } firstCall('lucia', 'php');
你得到这个......(瞧!)
大批 ( [文件] => /home/lufigueroa/Desktop/test.php [行] => 12 [功能] => theCall [参数] => 数组 ( [0] => 露西亚 [1] => php ) )
对我来说debug_backtrace
,我的内存已经达到了极限,我想在生产中使用它来记录和发送错误发生时的电子邮件。
相反,我发现这个解决方案非常有效!
// Make a new exception at the point you want to trace, and trace it!
$e = new Exception;
var_dump($e->getTraceAsString());
// Outputs the following
#2 /usr/share/php/PHPUnit/Framework/TestCase.php(626): SeriesHelperTest->setUp()
#3 /usr/share/php/PHPUnit/Framework/TestResult.php(666): PHPUnit_Framework_TestCase->runBare()
#4 /usr/share/php/PHPUnit/Framework/TestCase.php(576): PHPUnit_Framework_TestResult->run(Object(SeriesHelperTest))
#5 /usr/share/php/PHPUnit/Framework/TestSuite.php(757): PHPUnit_Framework_TestCase->run(Object(PHPUnit_Framework_TestResult))
#6 /usr/share/php/PHPUnit/Framework/TestSuite.php(733): PHPUnit_Framework_TestSuite->runTest(Object(SeriesHelperTest), Object(PHPUnit_Framework_TestResult))
#7 /usr/share/php/PHPUnit/TextUI/TestRunner.php(305): PHPUnit_Framework_TestSuite->run(Object(PHPUnit_Framework_TestResult), false, Array, Array, false)
#8 /usr/share/php/PHPUnit/TextUI/Command.php(188): PHPUnit_TextUI_TestRunner->doRun(Object(PHPUnit_Framework_TestSuite), Array)
#9 /usr/share/php/PHPUnit/TextUI/Command.php(129): PHPUnit_TextUI_Command->run(Array, true)
#10 /usr/bin/phpunit(53): PHPUnit_TextUI_Command::main()
#11 {main}"
我最喜欢的方式,在一条线上!
debug_backtrace()[1]['function'];
你可以像这样使用它:
echo 'The calling function: ' . debug_backtrace()[1]['function'];
请注意,这仅与去年发布的 PHP 版本兼容。但是出于安全原因,让您的 PHP 保持最新是一个好主意。
我刚刚写了一个名为“get_caller”的版本,希望对您有所帮助。我的很懒。你可以从一个函数中运行 get_caller() ,你不必像这样指定它:
get_caller(__FUNCTION__);
这是带有一个古怪测试用例的完整脚本:
<?php
/* This function will return the name string of the function that called $function. To return the
caller of your function, either call get_caller(), or get_caller(__FUNCTION__).
*/
function get_caller($function = NULL, $use_stack = NULL) {
if ( is_array($use_stack) ) {
// If a function stack has been provided, used that.
$stack = $use_stack;
} else {
// Otherwise create a fresh one.
$stack = debug_backtrace();
echo "\nPrintout of Function Stack: \n\n";
print_r($stack);
echo "\n";
}
if ($function == NULL) {
// We need $function to be a function name to retrieve its caller. If it is omitted, then
// we need to first find what function called get_caller(), and substitute that as the
// default $function. Remember that invoking get_caller() recursively will add another
// instance of it to the function stack, so tell get_caller() to use the current stack.
$function = get_caller(__FUNCTION__, $stack);
}
if ( is_string($function) && $function != "" ) {
// If we are given a function name as a string, go through the function stack and find
// it's caller.
for ($i = 0; $i < count($stack); $i++) {
$curr_function = $stack[$i];
// Make sure that a caller exists, a function being called within the main script
// won't have a caller.
if ( $curr_function["function"] == $function && ($i + 1) < count($stack) ) {
return $stack[$i + 1]["function"];
}
}
}
// At this stage, no caller has been found, bummer.
return "";
}
// TEST CASE
function woman() {
$caller = get_caller(); // No need for get_caller(__FUNCTION__) here
if ($caller != "") {
echo $caller , "() called " , __FUNCTION__ , "(). No surprises there.\n";
} else {
echo "no-one called ", __FUNCTION__, "()\n";
}
}
function man() {
// Call the woman.
woman();
}
// Don't keep him waiting
man();
// Try this to see what happens when there is no caller (function called from main script)
//woman();
?>
man() 调用 woman(),后者调用 get_caller()。get_caller() 还不知道是谁调用的,因为 woman() 很谨慎,没有告诉它,所以它递归查找。然后它返回谁调用了woman()。浏览器中源代码模式的打印输出显示了函数堆栈:
Printout of Function Stack:
Array
(
[0] => Array
(
[file] => /Users/Aram/Development/Web/php/examples/get_caller.php
[line] => 46
[function] => get_caller
[args] => Array
(
)
)
[1] => Array
(
[file] => /Users/Aram/Development/Web/php/examples/get_caller.php
[line] => 56
[function] => woman
[args] => Array
(
)
)
[2] => Array
(
[file] => /Users/Aram/Development/Web/php/examples/get_caller.php
[line] => 60
[function] => man
[args] => Array
(
)
)
)
man() called woman(). No surprises there.
我需要一些东西来列出调用类/方法(在 Magento 项目上工作)。
虽然debug_backtrace
提供了大量有用的信息,但它为 Magento 安装提供的信息量是压倒性的(超过 82,000 行!)因为我只关心调用函数和类,所以我设计了这个小解决方案:
$callers = debug_backtrace();
foreach( $callers as $call ) {
echo "<br>" . $call['class'] . '->' . $call['function'];
}
获取父函数名称的最简单方法是:
$caller = next(debug_backtrace())['function'];
我见过的这个问题的最佳答案是:
list(, $caller) = debug_backtrace(false);
短而干净