如何將函數參數作爲另一個本身具有不同參數的函數傳遞？

Question

我有以下功能：

function cache_activity_data($cid,$somefunction) { 

    $cache_time = '+15 minutes'; 
    $cache_id = $cid; 
    $expire = strtotime($cache_time); 
    $cache = cache_get($cache_id); 
    if (!empty($cache->data)) { 
    if (time() > $cache->expire) { 
     cache_clear_all($cache_id, 'cache_custom_activity_dashboard'); 
     $report = $somefunction; // will get from function 
     cache_set($cache_id, $report, 'cache_custom_activity_dashboard', $expire); 
    } 
    else { 
     $report = $cache->data; 
    } 
    } 
    else { 
    $report = $somefunction; // will get from function 
    cache_set($cache_id, $report, 'cache_custom_activity_dashboard', $expire); 
    } 

    return $report; 

} 

現在$somefunction可以像下面的例子：

total_comments_per_user($user->uid); 
total_comments_per_user_time_limit($user->uid, $user_year_start); 
total_revisions_time_limit($month_ago); 
total_revisions_time_limit($year_start); 

每次我需要通過像20種不同功能的時間

。這是可能的我越來越錯誤，因爲我在傳遞函數varibales的地方但我不能夠數字是可能的。

如何我想使用：

//want to write this as function 
$cache_revisions_total = cache_get("total_revisions", "cache_custom_activity_dashboard"); 
    if (!empty($cache_revisions_total->data)) { 
    if (time() > $cache_revisions_total->expire) { 
     cache_clear_all("total_revisions", 'cache_custom_activity_dashboard'); 
     $t_revisions = total_revisions(); 
     cache_set("total_revisions", $t_revisions, 'cache_custom_activity_dashboard', $expire); 
    } 
    else { 
     $t_revisions = $cache_revisions_total->data; 
    } 
    } 
    else { 
    $t_revisions = total_revisions(); 
    cache_set("total_revisions", $t_revisions, 'cache_custom_activity_dashboard', $expire); 
    } 
// want to write this as function end here 

    $vars['total_bubbla_rev'] = number_format(($t_revisions/$days_from_rev_start), 2, '.', ''); 

// here i want to do same so i need to write function or should i repeat code 
    $y_revisions = total_revisions_time_limit($year_start); 
    $vars['yearly_bubbla_rev'] = number_format(($y_revisions/$year_days), 2, '.', ''); 

// here i want to do same so i need to write function or should i repeat code 
    $m_revisions = total_revisions_time_limit($month_ago); 
    $vars['monthly_bubbla_rev'] = number_format(($m_revisions/30), 2, '.', ''); 

請建議，謝謝！

Answer 1

我看到兩種可能的選擇。

選項1

你可以使用Anonymous functions。我簡化你的功能，但你會得到的想法：

function cache_activity_data($cid, $somefunction) { 
    $report = $somefunction(); 
} 

定義函數，匿名函數：

$parm1 = "banana"; 
$parm2 = "fruit"; 

$your_function1 = function() use ($parm1, $parm2) { 
    echo "$parm1 is a $parm2"; 
}; 

$your_function2 = function() use ($parm1) { 
    echo $parm1; 
}; 

用法：

cache_activity_data($cid, $your_function1); // shows "banana is a fruit" 
cache_activity_data($cid, $your_function2); // shows "banana" 

通過文件仔細閱讀。特別是關於可變範圍的部分。

選項2

另一種可能性是call_user_func_array()，但是這需要你做出一點調整cache_activity_data()。您需要添加持有數組中的第三個參數：

function cache_activity_data($cid, $somefunction, $somefunction_parms) { 
    $report = call_user_func_array($somefunction, $somefunction_parms); 
} 

定義函數，像往常一樣：

function your_function1($parm1, $parm2) { 
    echo "$parm1 is a $parm2"; 
} 

function your_function2($parm) { 
    echo $parm; 
} 

使用

cache_activity_data($cid, "your_function1", array("banana", "fruit")); // shows "banana is a fruit" 
cache_activity_data($cid, "your_function2", array("banana")); // shows "banana" 

Answer 2

首先，你不能傳遞函數作爲參數，但是你可以使用回調如下解釋： http://php.net/manual/en/language.types.callable.php

但在你的情況，這似乎無關緊要你是不是確定的功能或cache_activity_data()改變其值。

因此，你可能想要做這樣的：

$reportDefault = total_comments_per_user($user->uid); 
// Or ... $reportDefault = total_revisions_time_limit, total_comments_per_user_time_limit, etc.. 
$report = cache_activity_data($cid, $reportDefault); 

你並不需要添加通$report或參數的任何功能。