Question

我知道这可能就是那些“树木问候”的问题之一，但我整天坐在这里，我只是看不出我错了。

情景：

基本上我有一个查询返回以下关联的地址结果数组，如下所示：

Array ( [0] => Array ( [Address_ID] => 12 [Address_String] => 23 Abledone road Hobs moat Solihull West Midlands B92 4JJ ) [1] => Array ( [Address_ID] => 13 [Address_String] => 22 Holdean Road Deepcut Surrey KT164NJ ) [2] => Array ( [Address_ID] => 14 [Address_String] => 32 Palbrough Road Nottingham N32 4NJ ) [3] => Array ( [Address_ID] => 15 [Address_String] => Flat 2B Gateway House Rutland Street Bearwood Westmidlands B66 9RT ) [4] => Array ( [Address_ID] => 16 [Address_String] => 258 Lincoln Street Bullworth Street Dundee DD35 9RJ ) [5] => Array ( [Address_ID] => 17 [Address_String] => 4 Scott Arms Avenue Beckton Hartfordshire H32 7JJ ) [6] => Array ( [Address_ID] => 18 [Address_String] => 14 Fairfield house Millbank road Bearwood Birmingham Westmidlands B137JJ ) [7] => Array ( [Address_ID] => 19 [Address_String] => 9 Scott road Olton Solihull Westmidlands B91 7TY ) [8] => Array ( [Address_ID] => 20 [Address_String] => Normandy House Bunnian Place Basingstoke RG21 7EJ ) [9] => Array ( [Address_ID] => 27 [Address_String] => 3 New Square Bedfont Lakes Feltham Middlesex TW14 8HB ) [10] => Array ( [Address_ID] => 28 [Address_String] => No. 1 The Square Temple Quay Bristol BS1 6DG ) [11] => Array ( [Address_ID] => 29 [Address_String] => The Visual Space Capital Park Fulbourn Cambridge CB21 5XH ) [12] => Array ( [Address_ID] => 40 [Address_String] => 21 St. Andrew Square Edinburgh Scotland CB21 5XH ) )

我想要做的就是将这些结果与搜索字符串相匹配，看看地址是否已经在我的数据库中。

我的代码如下：

  public function addressExistsByString ($searchAddrString, $asJSON = FALSE) {
    if (!isset($searchAddrString)) {
        throw new Exception('The searchAddrString variable of function ' . __FUNCTION__ . ' of class ' . __CLASS__ . 'was empty or set to NULL.');
    } elseif (!is_string($searchAddrString)) {
        throw new Exception('The type of value for the argument addressID of function ' . __FUNCTION__ . ' of class ' . __CLASS__ . ' was ' . gettype($searchAddrString) . ' a string was expected');
    }if (!is_bool($asJSON)) {
        $asJSON = FALSE;
    }

   print_r ($addressArray = $this->getAllLocations(FALSE));

    if ($addressArray === -1) {
        return -2;
    } else {

        $search = str_replace(',','',  strtolower(trim($searchAddrString)));

        foreach ($addressArray as $record) {

           $recID = $record ['Address_ID']; 
           $currentAddress =str_replace(',','',  strtolower(trim($record['Address_String'])));

           echo 'Search address: '. $search. ' Current address: '.  $currentAddress .' type of current address: '.gettype($searchAddrString).'<br/>';  

           if ($currentAddress === $search) {

               if ($asJSON) {
                   echo json_encode($recID);
               }
               return intval($recID);
           }
        }
        if ($asJSON) {
            echo json_encode(-1);
        }
        return -1;
    }
}

当我运行此代码时，我得到以下输出（抱歉它有点长，但重要的一点突出显示）：

bunnian place basingstoke rg21 7ej当前地址：23 abledone road hobs moat solihull west midlands b92 4jj当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：22 holdean road deepcut surrey kt164nj当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：32 palbrough road nottingham n32 4nj当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：flat 2b gateway house rutland street bearwood westmidlands b66 9rt类型当前地址：string 搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：258 lincoln street bullworth street dundee dd35 9rj当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：4 scott arms avenue beckton hartfordshire h32 7jj当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：14 fairfield house millbank road bearwood birmingham westmidlands b137jj当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：9 scott road olton solihull westmidlands b91 7ty当前地址类型：字符串搜索地址： normandy house bunnian place basingstoke rg21 7ej 当前地址： normandy house bunnian place basingstoke rg21 7ej 当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：3 new square bedfont lakes feltham middlesex tw14 8hb当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：no。 1方形寺码头布里斯托尔bs1 6dg当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：visual space capital park fulbourn cambridge cb21 5xh当前地址类型：字符串搜索地址：normandy house bunnian place basingstoke rg21 7ej当前地址：21 st。安德鲁广场爱丁堡苏格兰cb21 5xh当前地址类型：字符串 -1

突出显示的字符串完全相同，我测试了它们并将它们作为普通字符串粘贴在单独的if语句中，并且始终返回true。我已经尝试了==，===强制转换，字符串值以及我能想到的其他所有内容，但由于某种原因，始终会返回-1。我知道它可能是非常简单的我想念但是我无法看到它，任何人都可以帮忙吗？

提前致谢。

Answer 1

在比较它们之前，

var_dump()你的两个变量。在此之前回显<pre>标记，以查看浏览器中的所有空格，而无需切换到HTML源代码。

你很可能会错过那里的一些空白角色。

为什么即使对于相同的字符串，字符串比较总是返回false？

1 个答案: