计数foreach循环项目

Question

我有以下阵列：

[2]=> 
    object(stdClass)#9 (4) { 
    ["ID"]=> 
    string(32) "43c845f895a56fbe8aea9435ef8fa806" 
    ["Type"]=> 
    string(8) "Campaign" 
    ["Name"]=> 
    string(28) "An unmissable invitation for" 
    ["Actions"]=> 
    array(5) { 
     [0]=> 
     object(stdClass)#10 (4) { 
     ["Event"]=> 
     string(4) "Open" 
     ["Date"]=> 
     string(19) "2013-05-07 17:00:00" 
     ["IPAddress"]=> 
     string(12) "109.239.93.2" 
     ["Detail"]=> 
     string(0) "" 
     } 
     [1]=> 
     object(stdClass)#11 (4) { 
     ["Event"]=> 
     string(4) "Open" 
     ["Date"]=> 
     string(19) "2013-05-07 09:01:00" 
     ["IPAddress"]=> 
     string(12) "109.239.93.2" 
     ["Detail"]=> 
     string(0) "" 
     } 
     [2]=> 
     object(stdClass)#12 (4) { 
     ["Event"]=> 
     string(4) "Open" 
     ["Date"]=> 
     string(19) "2013-04-30 22:29:00" 
     ["IPAddress"]=> 
     string(14) "94.171.192.216" 
     ["Detail"]=> 
     string(0) "" 
     } 
     [3]=> 
     object(stdClass)#13 (4) { 
     ["Event"]=> 
     string(5) "Click" 
     ["Date"]=> 
     string(19) "2013-04-30 17:43:00" 
     ["IPAddress"]=> 
     string(12) "109.239.93.2" 
     ["Detail"]=> 
     string(60) "http://www.rbh.co.uk/rbhevent/?name=[fullname]&email=[email]" 
     } 
     [4]=> 
     object(stdClass)#14 (4) { 
     ["Event"]=> 
     string(4) "Open" 
     ["Date"]=> 
     string(19) "2013-04-30 17:43:00" 
     ["IPAddress"]=> 
     string(12) "109.239.93.2" 
     ["Detail"]=> 
     string(0) "" 
     } 
    } 
    } 

我试图计算是相同的事件。例如[“Event”] = Open = 4/[“Event”] = Click = 1。

我试图通过计数foreach循环来实现这一目标：

$i=0; 
foreach($entry->Actions as $actions) { 
echo $i++;   
} 

林不太清楚如何处理呢？有人可以提出最佳做法吗？

Answer 1

$counts = array(); 

foreach($entry->Actions as $actions) { 
    if(!isset($counts[$actions->Event])) { 
     $counts[$actions->Event] = 0; 
    } 
    ++$counts[$actions->Event]; 
} 

print_r($counts); 

Answer 2

<?php 
$amounts = array(); // Events as key 
foreach($entry->Actions as $actions) 
{ 
    if (isset($amounts[$actions["Event"]])) $amounts[$actions["Event"]]++; 
    else $amounts[$actions["Event"]] = 1; 
} 
print_r($amounts); 
echo "<br>".$amounts["Open"]; 
?>