我从这个问题和答案中学到了什么。感谢所有!

假设我有这些变量和函数:

$functionName1 = "sayHello";
$functionName2 = "sayHelloTo";
$functionName3 = "saySomethingTo";

$friend = "John";
$datas = array(
    "something"=>"how are you?",
    "to"=>"Sarah"
);

function sayHello()
{
echo "Hello!";
}

function sayHelloTo($to)
{
echo "Dear $to, hello!";
}

function saySomethingTo($something, $to)
{
echo "Dear $to, $something";
}

To call function without arguments // Calling sayHello() call_user_func($functionName1); Hello! To call function with 1 argument // Calling sayHelloTo("John") call_user_func($functionName2, $friend); Dear John, hello! To call function with 1 or more arguments This will be useful if you are dynamically calling your functions and each function have different number of arguments. This is my case that I have been looking for (and solved). call_user_func_array is the key // You can add your arguments // 1. statically by hard-code, $arguments[0] = "how are you?"; // my $something $arguments[1] = "Sarah"; // my $to // 2. OR dynamically using foreach $arguments = NULL; foreach($datas as $data) { $arguments[] = $data; } // Calling saySomethingTo("how are you?", "Sarah") call_user_func_array($functionName3, $arguments); Dear Sarah, how are you?

耶再见！

$functionName()或call_user_func($functionName)

使用存储在变量中的名称安全地调用函数的最简单方法是，

//I want to call method deploy that is stored in functionname 
$functionname = 'deploy';

$retVal = {$functionname}('parameters');

我使用如下方法在Laravel中动态创建迁移表，

foreach(App\Test::$columns as $name => $column){
        $table->{$column[0]}($name);
}

我最喜欢的版本是内联版本:

${"variableName"} = 12;

$className->{"propertyName"};
$className->{"methodName"}();

StaticClass::${"propertyName"};
StaticClass::{"methodName"}();

你也可以把变量或表达式放在括号里!

如果你在一个对象上下文中试图动态调用一个函数，请尝试如下代码:

$this->{$variable}();

使用call_user_func函数。