PHP 获取函数参数名71

在 PHP 中，获取函数参数名通常需要使用反射功能。反射允许我们获取有關函數和類別的元資訊，包括參數清單。

使用 ReflectionParameter

要获取函数的参数名，我们可以使用 ReflectionParameter 类。此类提供有关函数参数的各种信息，包括其名称。

以上代码将打印以下输出：
param1
param2

使用 get_defined_vars()

在某些情况下，我们可以使用 get_defined_vars() 函数获取当前范围内定义的变量，包括函数参数。

以上代码将打印以下输出：
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars"]=>
array(2) {
["param1"]=>
string(6) "value1"
["vars