PHP XPath查詢XML？

我試圖製作一個PHP文件，可以在XML文檔中搜索特定的魚。這是我寫的：PHP XPath查詢XML？

$FISH_NAME = $_POST["fish_name"]; 
$LOCATION = $_POST["location"]; 
$STATUS = $_POST["status"]; 
$EDIBLE = $_POST["edible"]; 
$SCS_NAME = $_POST["scs_name"]; 
$COLOR = $_POST["color"]; 
$FEATURE = $_POST["feature"]; 


$varsPassed = array(
    $FISH_NAME => "NAME", 
    $LOCATION => "@LOCATION", 
    $STATUS => "STATUS", 
    $EDIBLE => "EDIBLE", 
    $SCS_NAME => "SCS-NAME", 
    $COLOR => "COLORS/COLOR", 
    $FEATURE => "FEATURES/FEATURE" 
); 

$conditional = ""; 

function addToCond($varPassed, $tagName) { 
    if (!empty($varPassed)) { 
     if(!empty($conditional)) { 
      $conditional .= " and {$tagName} = '{$varPassed}'"; 
     } 
     else { 
      $conditional = "{$tagName} = '{$varPassed}'"; 
     } 
    } 
} 

foreach($varsPassed as $current_feature => $current_tag_name) { 
    addToCond($current_feature, $current_tag_Name); 
    echo "{$current_feature}: {$current_tag_name}\n"; 
} 

$query = "/FISHDICT/FISH[@LOCATION = 'REEF']"; 
echo $query; 

$dom = new DOMDocument(); 
$dom->load('server/fish.xml'); 
$xpath = new DOMXpath($dom); 
$value = $xpath->evaluate($query); 
foreach($value as $item) { 
    echo "found: {$item->nodeValue}\n\n"; 
}

但它不起作用。我得到這個迴盪在網頁上：

神仙：NAME：特點/特徵/ FISHDICT/FISH [@LOCATION ='暗礁]

有誰知道爲什麼它通過每個不循環帖子變量？

XML：

<FISH location="REEF"> 
    <NAME>Angelfish</NAME> 
    <COLORS> 
     <COLOR> Blue </COLOR> 
     <COLOR> Green </COLOR> 
    </COLORS> 
    <FEATURES> 
     <FEATURE> Round head </FEATURE> 
     <FEATURE> Crown on head </FEATURE> 
     <FEATURE> Tall tail fin </FEATURE> 
    </FEATURES> 
    <TAGS> 
     <TAG> REEF-FISH </TAG> 
     <TAG> MULTICOLORED </TAG> 
    </TAGS> 
    <STATUS> ENDANGERED </STATUS> 
    <DESCRIPTION> This fish is found in reefs and is common throughout Bermuda...</DESCRIPTION> 
    <FISHINGLEGAL> FALSE </FISHINGLEGAL> 
    <DIET> 
     <DIETITEM> Algae </DIETITEM> 
     <DIETITEM> Sea Plants </DIETITEM> 
    </DIET> 
    <EDIBLE> FALSE </EDIBLE> 
    <SCS-NAME> Holacanthus ciliaris </SCS-NAME> 
</FISH>

來源

2015-04-05 brimstone

當我輸入靜態值時，您的腳本適用於我。你確定你的POST名稱是正確的嗎？也不確定你是否期待將來使用'$ conditional'，但目前的代碼中不會有任何內容。 – chris85 2015-04-05 22:02:17

從你的輸出$varsPassed陣列顯然不包含你所期望的。要進行調試，我會在文件的頂部做print_r($_POST);以查看帖子值是否符合您的期望值。在創建該數組後，可能會有一個print_r($varsPassed);，以確保它按預期填充。

順便說一句，您的函數addToCond()正嘗試將值追加到函數範圍內的變量$conditional。您應更改該功能，以返回一個值，該值將被附加到呼叫代碼中的$conditional，或者通過引用$conditional傳入該功能。

來源

2015-04-05 22:05:00

PHP XPath查詢XML？

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