blocks|key|2961929|text|像这样?？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2961930|$confs_arr+=+array("1"+=>+N,+"2"+=>+text,"3"+=>+N4,+"4"+=>+text3,"5"+=>+N5,"6"+=>+text7);
echo+"<select+name='option'+id='option'>";
foreach($confs_arr+as+$keys=>$confs){

echo+"<option+value='".$confs."'>".$confs."</option>";

}
echo+"</select>";|code-block|syntax|javascript|2961931|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Like this ??

<pre><code>$confs_arr = array("1" =&gt; N, "2" =&gt; text,"3" =&gt; N4, "4" =&gt; text3,"5" =&gt; N5,"6" =&gt; text7);
echo "&lt;select name='option' id='option'&gt;";
foreach($confs_arr as $keys=&gt;$confs){

echo "&lt;option value='".$confs."'&gt;".$confs."&lt;/option&gt;";

}
echo "&lt;/select&gt;";
</code></pre>

blocks|key|5175534|text|以下是与您询问的代码类似的示例代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5175535|+++<?php

$categories+=+$rows;+//array+from+database
foreach($rows+as+$row){
+++++if($row['name']+==+$_POST['category']){
++++++++++$isSelected+=+'+selected="selected"';+//+if+the+option+submited+in+form+is+as+same+as+this+row+we+add+the+selected+tag
+++++}+else+{
++++++++++$isSelected+=+'';+//+else+we+remove+any+tag
+++++}
+++++echo+"<option+value='".$row['id']."'".$isSelected.">".$row['name']."</option>";
}
?>|code-block|syntax|javascript|5175536|$_POST['category']是用户之前选择的，它可以是任何内容，而不仅仅是$_POST。|offset|length|style|CODE|5175537|基于此示例，您可以修改代码。|5175538|如果用户之前选择了"text"，则html代码应为：|5175539|<select+name="conf_2">
+++++<option+value="text"+selected="selected">text</option>
+++++<option+value="alsotext">alsotext</option>
</select>|5175540|将selected="selected"放在<option>标签中，该项目将被选为默认值。|5175541|希望这能有所帮助|5175542|entityMap^0|0|0|0|I|15|6|0|0|9|6|0|0|1|J|M|8|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@$I|11|J|12|K|L]|$I|13|J|14|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|16|8|@$I|17|J|18|K|L]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1A|8|@$I|1B|J|1C|K|L]|$I|1D|J|1E|K|L]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1F|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|X|$]]

Below is the sample code similar to the one you asked:

<pre><code> &lt;?php

$categories = $rows; //array from database
foreach($rows as $row){
 if($row['name'] == $_POST['category']){
 $isSelected = ' selected="selected"'; // if the option submited in form is as same as this row we add the selected tag
 } else {
 $isSelected = ''; // else we remove any tag
 }
 echo "&lt;option value='".$row['id']."'".$isSelected."&gt;".$row['name']."&lt;/option&gt;";
}
?&gt;
</code></pre>

<code>$_POST['category']</code> is user previously selected, it can be anything, not just <code>$_POST</code>.

Based on this example, you can modify your code.

If user previously chose <code>"text"</code>, then the html code should be :

<pre><code>&lt;select name="conf_2"&gt;
 &lt;option value="text" selected="selected"&gt;text&lt;/option&gt;
 &lt;option value="alsotext"&gt;alsotext&lt;/option&gt;
&lt;/select&gt;
</code></pre>

Put <code>selected="selected"</code> in the <code>&lt;option&gt;</code> tag and this item will be chosen as default.

Hope this helps

blocks|key|3445613|text|我更喜欢将孔模板加载到DOM中并对其进行修改：(代码未经过测试！)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3445614|$dom+=+new+DOMDocument();
$dom->loadXML('<yourTemplateXML+/>');
$xPath+=+new+DOMXPath($dom);
$data+=+array('conf1'+=>+'N',+'conf2'+=>+'text');


foreach+($xPath->query('//select')+as+$select)+{
++++foreach($xPath->query('./option',+$select)+as+$option)+{
++++++++if+($option->getAttribute('value')+==+$data[$select->getAttribute('name')])+{
++++++++++++$option->setAttribute('selected',+'selected');
++++++++}
++++}
}

echo+$dom->saveXML();|code-block|syntax|javascript|3445615|我写了一个类，它可以处理所有字段类型。在生产环境中，应该注意数据数组中的键是否存在，以此类推。|3445616|这有一个很好的副作用:因为您是通过dom设置值的，所以它可以保护表单不受XSS的影响。|3445617|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I prefer to load the hole template into a DOM and modify it: (Code not tested!)

<pre><code>$dom = new DOMDocument();
$dom-&gt;loadXML('&lt;yourTemplateXML /&gt;');
$xPath = new DOMXPath($dom);
$data = array('conf1' =&gt; 'N', 'conf2' =&gt; 'text');


foreach ($xPath-&gt;query('//select') as $select) {
 foreach($xPath-&gt;query('./option', $select) as $option) {
 if ($option-&gt;getAttribute('value') == $data[$select-&gt;getAttribute('name')]) {
 $option-&gt;setAttribute('selected', 'selected');
 }
 }
}

echo $dom-&gt;saveXML();
</code></pre>

I wrote a class, which can handle all field-types. Note this is only samplecode. On production you should take care if the key in your data-array exists and so on. 

This has a nice Side-effect: Because you set the Value via dom, it protects your form from XSS

I've a form with select boxes and a value from database which has been chosen before. Yes I need this value which is chosen to be shown as last chosen inside form. I try using php dom but I' m not getting anywhere. 

So here is the html:

<pre><code>&lt;select name="conf_1"&gt;
 &lt;option value="Y"&gt;Yes&lt;/option&gt;
 &lt;option value="N"&gt;No&lt;/option&gt;
&lt;/select&gt;
&lt;select name="conf_2"&gt;
 &lt;option value="text"&gt;text&lt;/option&gt;
 &lt;option value="alsotext"&gt;alsotext&lt;/option&gt;
&lt;/select&gt;
</code></pre>

And now I would like to show the chosen option which is stored in array like this:

<pre><code>$confs = array([1] =&gt; N, [2] =&gt; text );
</code></pre>

Do some code:

<pre><code>loop{
 &lt;option value="$confs[$i]"&gt;$confs[$i]&lt;/option&gt; has to be appended to &lt;select name="conf_$i"&gt;
}
</code></pre>

Now I can't find a way to do this. I've tried using php dom but I don't know how to select element by name attribute and then loop trough so I can't make a real php example. I just would not know where to start.

If someone just has a way to do this please enlighten me!?

Done it with this code inspired by @Markus I.:

<pre><code>$dom = new DOMDocument();
 $dom-&gt;loadHTML($form);
 $xPath = new DOMXPath($dom);

 foreach ($dom-&gt;getElementsByTagName('select') as $select) {
 $name = $select-&gt;getAttribute('name');
 $name = str_replace('conf_', '', $name);

 foreach($xPath-&gt;query('./option', $select) as $option) {
 if ($option-&gt;getAttribute('value') == $confs[$name]) {
 $option-&gt;setAttribute('selected', 'selected');
 }
 }
 }

 $form = $dom-&gt;saveHTML($dom);

 echo $form;
</code></pre>

PHP - Fill in select boxes with value form database

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个表单的选择框和一个从数据库中的值，这是以前选择的。是的，我需要这个值，它是选择显示为最后选择的表单内。我试着用php dom，但什么也没用。下面是html：<select name="conf_1"> <option value="Y">Yes</option> <option value="N...

问PHP -使用值表单数据库填写选择框
EN

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问PHP -使用值表单数据库填写选择框EN