替换节点 XMLDOM 和 PHP

Question

在将数据输入表单时替换 XML 节点时遇到问题 我的代码如下：

$xml = new DOMDocument("1.0", "ISO-8859-1");
                    $xml->preserveWhiteSpace = FALSE;
                    $xml->formatOutput = TRUE;
                    $xml->load($fichier);
                    $xpath = new DOMXPATH($xml);

                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/flagplus");
                    foreach($query as $result){ $flagplus = $result->textContent;}
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/entete");
                    foreach($query as $result){ $entete = utf8_encode($result->textContent);}
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/nouveau");
                    foreach($query as $result){ $nouveau = $result->textContent;}
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/description");
                    foreach($query as $result){ $description = utf8_encode($result->textContent);}
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/couleur");
                    foreach($query as $result){ $couleur = $result->textContent;}
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/detail");
                    foreach($query as $result){ $detail = utf8_encode($result->textContent);}
                    $detail = str_replace('<br/>', PHP_EOL, $detail);
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/autre");
                    foreach($query as $result){ $autre = utf8_encode($result->textContent);}
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/contact");
                    foreach($query as $result){ $contact = utf8_encode($result->textContent);}
                    $query = $xpath->query("/$racine/annonce[@id = '$annonce_no']/vente");
                    foreach($query as $result){ $vente = utf8_encode($result->textContent);}

                    $node = $xpath->query("/$racine/annonce[@id = '$annonce_no']");             


                    if (isset($_POST['submitSave'])){

                        $id_new          = $_POST['id'];
                        $flagplus_new    = $_POST['flagplus'];
                        $entete_new      = htmlentities($_POST['entete'], ENT_XML1);
                        $nouveau_new     = $_POST['nouveau'];
                        $description_new = htmlentities($_POST['description'], ENT_XML1);
                        $couleur_new     = $_POST['couleur'];
                        $detail_new      = htmlentities($_POST['detail'], ENT_XML1);
                        $autre_new       = htmlentities($_POST['autre'], ENT_XML1);
                        $contact_new     = htmlentities($_POST['contact'], ENT_XML1);
                        $vente_new       = htmlentities($_POST['vente'], ENT_XML1);

                        $node->replaceChild($id_new, $id);
                        $node->replaceChild($flagplus_new, $flagplus);
                        $node->replaceChild($entete_new, $entete);
                        $node->replaceChild($description_new, $description);
                        $node->replaceChild($couleur_new, $couleur);
                        $node->replaceChild($detail_new, $detail);
                        $node->replaceChild($autre_new, $autre);
                        $node->replaceChild($contact_new, $contact);
                        $node->replaceChild($vente_new, $vente);

                        $xml->save($fichier);

我想用旧值更改新值。 DOM 文档说：public DOMNode DOMNode::replaceChild (DOMNode $newnode , DOMNode $oldnode)

和表格

                    <form method="post" class="thumbnail">
                <div>
                    <p>ID</br>
                       <input type="text" name="id" style="width:30px;" maxlength="3" value="<?php echo $annonce_no  ?>" ></p>
                </div>
                <div>
                    <p>2ème drapeau</br>
                       <input type="text" name="flagplus" style="width:20px;" maxlength="2" value="<?php echo $flagplus  ?>" >&nbsp;&nbsp;blanc,FR,GE,VD,VS</p>
                </div>
                <div>
                    <p>Nouveau</br>
                       <input type="text" name="nouveau" style="width:10px;" maxlength="1" value="<?php echo $nouveau  ?>" >&nbsp;&nbsp;0=Non, 1=Oui</p>
                </div>
                <div>
                    <p>Couleur description</br>
                    <input type="text" name="couleur" style="width:10px;" maxlength="1" value="<?php echo $couleur  ?>" >&nbsp;&nbsp;blanc ou R = rouge</p>
                </div>

                <div>
                    <p>Entete</br>
                       <input type="text" name="entete" style="width:20%" value="<?php echo $entete  ?>" ></p>
                </div>
                <div>
                    <p>Description</br>
                       <input type="text" name="description" style="width:80%" value="<?php echo $description  ?>" ></p>
                </div>
                <div>
                    <p>Détail annonce</br>
                       <textarea name="detail"  style="width:80%" cols="200" rows="8"><?=$detail;?></textarea></p>
                </div>
                <div>
                    <p>Autre</br>
                       <input type="text" name="autre" style="width:80%" value="<?php echo $autre  ?>" ></p>
                </div>
                <div>
                    <p>Contact</br>
                       <input type="text" name="contact" style="width:80%" value="<?php echo $contact  ?>" ></p>
                </div>
                <div>
                    <p>Vente</br>
                       <input type="text" name="vente" style="width:20%;" value="<?php echo $vente  ?>" ></p>
                </div>

                <div align="center"><input type="submit" name="submitSave" value="Enregistrer" class="btn btn-primary" style="width:150px"></div>

                </form>

我收到消息：致命错误：调用未定义函数 replaceChild 我看过How to update xml file using PHP? 似乎对他有用。我也有同样的想法......

有什么想法吗？谢谢！

Answer 1

$node = $xpath->query("/$racine/annonce[@id = '$annonce_no']"); 没有给你一个 DOM 节点，它是一个 DOM 节点列表。所以你至少需要$node = $xpath->query("/$racine/annonce[@id = '$annonce_no']")->item(0); 来拥有一个暴露replaceChild 方法的对象。但是，分配有例如的其他变量$flagplus_new = $_POST['flagplus']; 根本不是您可以传递给该方法的节点，变量$flagplus = $result->textContent; 也不是所有字符串值。如果您想用新值替换元素的内容，那么选择该元素并设置 textContent 似乎是正确的方法。

所以假设例如

$node = $xpath->query("/$racine/annonce[@id = '$annonce_no']")->item(0);

为您提供正确的元素，然后您可以选择 description 子元素，例如

$descEl = $xpath->query('description', $node)->item(0);

并使用例如更改其内容

$descEl->textContent = $newDescription;

唯一的缺点是文档http://php.net/manual/en/class.domnode.php 说“5.6.1 textContent 属性已变为可写（以前它是只读的）。”。