PHP array_key_exists返回false错误

我的数据是从客户的CMS拉升，但我发现了奇怪的结果PHP array_key_exists返回false错误

print_r($appliance_data); 
foreach ($appliance_data as $adKey => $adValue) { 
    print_r($adKey); 
    print_r($adValue); 
    print_r(array_key_exists($adKey, $appliance_data)); 
    print_r(isset($appliance_data[$adKey])); 
}

随着输出

Array 
(
    [94] => stdClass Object 
     (
      [operation] => 0 
      [value] => 0 
     ) 

    [102] => stdClass Object 
     (
      [operation] => 501 
      [value] => 4 
     ) 

    [90] => stdClass Object 
     (
      [operation] => 0 
      [value] => 0 
     ) 
) 
94 
stdClass Object 
(
    [operation] => 0 
    [value] => 0 
) 
(boolean) FALSE 
(boolean) FALSE 
102 
stdClass Object 
(
    [operation] => 501 
    [value] => 4 
) 
(boolean) FALSE 
(boolean) FALSE 
90 
stdClass Object 
(
    [operation] => 0 
    [value] => 0 
) 
(boolean) FALSE 
(boolean) FALSE

任何想法是什么引起的？

编辑：错误是array_key_exists AND isset 返回通过循环数组获得的密钥FALSE！

serialize($appliance_data) 



a:7:{s:2:"94";O:8:"stdClass":3:{s:9:"operation";s:3:"514";s:5:"value";s:1:"2";s:9:"frequency";s:1:"0";}s:3:"102";O:8:"stdClass":3:{s:9:"operation";s:3:"511";s:5:"value";s:1:"4";s:9:"frequency";s:1:"1";}s:2:"90";O:8:"stdClass":3:{s:9:"operation";s:1:"0";s:5:"value";s:1:"0";s:9:"frequency";s:1:"0";}s:2:"68";O:8:"stdClass":3:{s:9:"operation";s:3:"501";s:5:"value";s:1:"3";s:9:"frequency";s:1:"2";}s:2:"66";O:8:"stdClass":3:{s:9:"operation";s:1:"0";s:5:"value";s:1:"0";s:9:"frequency";s:1:"0";}s:2:"84";O:8:"stdClass":3:{s:9:"operation";s:1:"0";s:5:"value";s:1:"0";s:9:"frequency";s:1:"0";}s:2:"98";O:8:"stdClass":3:{s:9:"operation";s:1:"0";s:5:"value";s:1:"0";s:9:"frequency";s:1:"0";}}

来源

2012-04-04 Zeophlite

一些代码的为奇数（将无法运行，因为它是 - 太多的括号在print_r（）之后）。循环位看起来应该运行良好，而最后一行应该会导致错误。你可以通过运行确认吗？当我尝试类似的代码时，我的循环运行良好。 – 2012-04-04 09:37:22

@Matt，额外的支架是由于代码深入客户CMS内。该数组由客户端CMS提供，所以我认为它的编码不正确！ – Zeophlite 2012-04-11 03:32:55

您使用的是字符串 '94'，而不是一个int 94.尝试：

print_r(array_key_exists(94, $appliance_data));

编辑：我无法在本地重现这个在所有 - 任何人都可以别的吗？

我试着用下面的代码复制此：

$first = new stdClass(); 
$first->operation = 0; 
$first->value = 0; 
$second = new stdClass(); 
$second->operation = 501; 
$second->value = 4; 
$third = new stdClass(); 
$third->operation = 0; 
$third->value = 0; 

$appliance_data = array(94 => $first, 102 => $second, 90 => $third); 
// Same output when using these lines too: 
// $appliance_data = array('94' => $first, '102' => $second, '90' => $third); 
// $appliance_data = array("94" => $first, "102" => $second, "90" => $third); 

print_r($appliance_data); 
echo "\n\n"; 
foreach ($appliance_data as $adKey => $adValue) { 
    print_r($adKey); 
    echo "\n"; 
    print_r($adValue); 
    print_r(array_key_exists($adKey, $appliance_data)); 
    echo "\n"; 
    print_r(isset($appliance_data[$adKey])); 
    echo "\n\n"; 
}

，并得到这样的输出：

Array 
(
    [94] => stdClass Object 
     (
      [operation] => 0 
      [value] => 0 
     ) 

    [102] => stdClass Object 
     (
      [operation] => 501 
      [value] => 4 
     ) 

    [90] => stdClass Object 
     (
      [operation] => 0 
      [value] => 0 
     ) 

) 


94 
stdClass Object 
(
    [operation] => 0 
    [value] => 0 
) 
1 
1 

102 
stdClass Object 
(
    [operation] => 501 
    [value] => 4 
) 
1 
1 

90 
stdClass Object 
(
    [operation] => 0 
    [value] => 0 
) 
1 
1

来源

2012-04-04 09:27:52

+1，这是造成错误。 – jerrymouse 2012-04-04 09:28:36

虽然这不是循环中的字符串？ – 2012-04-04 09:30:07

是的，循环看起来很奇怪。 – 2012-04-04 09:32:09

PHP array_key_exists返回false错误

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