函數中的變量變量？

Question

我需要這方面的幫助：

$foo = array ('Projects', 'Clients'); 

，我需要從預裝的庫運行功能

$bar->getProjects()->data 
$bar->getClients()->data 

等等，等等

，但我有它的週期。所以我想要類似

foreach($foo as $value) 
    $return_value = $bar->get >>>>$value<<<< ()->data 

這怎麼辦？

Answer 1

請參閱How to call PHP function from string stored in a Variable：

foreach ($foo as $value) { 
    $method = 'get' . $value; 
    $return_value = $bar->$method()->data 
} 

或

foreach ($foo as $value) 
    $return_value = $bar->{'get' . $value}()->data; 

Answer 2

沒有爲一個魔術方法：__call

function __call($method, $params) { 

    $var = substr($method, 3); 

    if (strncasecmp($method, "get", 3)) { 
     return $this->$var; 
    } 
    if (strncasecmp($method, "set", 3)) { 
     $this->$var = $params[0]; 
    } 
} 

您還可以看看call_user_func

Answer 3

我會用反射，一個有據可查的，沒有神奇的API：

<?php 

$foo = array ('Projects', 'Clients'); 
$bar = new MyAwesomeClass(); 

var_dump(invokeMultipleGetters($bar, $foo)); 


// could also make this a method on MyAwesomeClass... 
function invokeMultipleGetters($object, $propertyNames) 
{ 
    $results = array(); 
    $reflector = new ReflectionClass($object); 

    foreach($propertyNames as $propertyName) 
    { 
     $method = $reflector->getMethod('get'.$propertyName); 
     $result = $method->invoke($bar); 
     array_push($results, $result) 
    } 

    return $results; 
}