Ich habe ein Formular, das der Benutzer wie folgt eingibt oder einen Wert auswählt

<form id="search_photos" action="photo_result.php" method="get">
<select name="Photographer_id" id="Photographer_id"   style="height:23px; border:1px solid Silver;">
    <option selected="selected" value="x">Any Photographer_id</option>
    <option value="John">John</option>
    <option value="Fred">Fred</option>
    <option value="Joseph">Joseph</option>
</select>
<select name="Photographer_id" id="Photographer_id"   style="height:23px; border:1px solid Silver;">
    <option selected="selected" value="x">Any Photographer_id</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
</select>
<select name="images" id="images"   style="height:23px; border:1px solid Silver;">
    <option selected="selected" value="x">All Images</option>
    <option value="0">None</option>
    <option value="a">Image a</option>
    <option value="b">Image b </option>
    <option value="c">Image c </option>
</select>
    <select name="images_id" id="images_id"   style="height:23px; border:1px solid Silver;">
    <option selected="selected" value="x">All Images</option>
    <option value="0">None</option>
    <option value="1">1</option>
    <option value="2">2</option>
    <option value="3">3</option>
</select>
<input name="Submit" value="Search Now &gt;" id="Submit" class="Adv1_Filter_Button" type="submit">

Dann ist diesearch_photo.php Skript, das das Ergebnis des Formulars auffängt und die vom Benutzer eingegebenen Werte wie folgt filtert

$xml = simplexml_load_file("photo.xml");

for ($i = 0; $i < count($xml); $i++) {  

    if (isset($_GET["LocationName"])) {
        $photographer_id = $_GET["LocationName"];
    }

    $result = $xml->xpath('/root/area[photographer_id="' . $photographer_id . '"]  ');
}

if(isset($_GET["Photographer"])) {
    $photographer = $_GET["Photographer"];
} 

$result = $xml->xpath('/root/area[photographer_id="' . $photographer_id . '"]  ');

if(isset($_GET["images"])) {
    $image = $_GET["images"];
}

echo $photographer_id;
echo $photographer;
echo $image;
var_dump ($result);

Das$result ab dem ersten XPATH-Durchgang ist korrekt, wenn nur "photographer_id" eingestellt ist, wenn ich es dann versuche$result = $xml->xpath('/root/area[photographer_id="' . $photographer_id . '"] | /root/area[photographer="' . $photographer . '"]'); und wählen Sie1 undfred Dann erhalte ich das Ergebnis eines Arrays von allen vier, wenn es ein leeres Array sein soll, das Hinweise zur Behebung dieses Fehlers gibt. Tut mir leid, hier ist die XML-Datei

 <?xml version="1.0" encoding="UTF-8"?>
  <root>
   <area>
    <photographer_id>1</photographer_id>
    <photographer>John</photographer>
    <image>a</image>
    <image_id>1</image_id>
   </area>
   <area>
    <photographer_id>1</photographer_id>
    <photographer>John</photographer>
    <image>b</image>
    <image_id>2</image_id>
   </area>
   <area>
    <photographer_id>1</photographer_id>
    <photographer>John</photographer>
    <image>c</image>
    <image_id>3</image_id>
   </area>
   <area>
    <photographer_id>2</photographer_id>
    <photographer>Fred</photographer>
    <image>a</image>
    <image_id>4</image_id>
   </area>
   <area>
    <photographer_id>3</photographer_id>
    <photographer>Joseph</photographer>
    <image>a</image>
    <image_id>5</image_id>
   </area>
  </root>

Wenn dies hilft, ist die endgültige XML-Datei jedoch größer.