php html 选择选项 SELECTED
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html select option SELECTED
提问by Jam Ville
I have in my php
我在我的 php
$sel = "
<option> one </option>
<option> two </option>
<option> thre </option>
<option> four </option>
";
let say I have an inline URL = site.php?sel=one
假设我有一个内联 URL = site.php?sel=one
if I didn't saved those options in a variable, I can do it this way to make one of the option be SELECTED where value is equal to $_GET[sel]
如果我没有将这些选项保存在变量中，我可以通过这种方式使其中一个选项成为 SELECTED 其中 value 等于 $_GET[sel]
<option <?php if($_GET[sel] == 'one') echo"selected"; ?> > one </option>
<option <?php if($_GET[sel] == 'two') echo"selected"; ?> > two </option>
<option <?php if($_GET[sel] == 'three') echo"selected"; ?> > three </option>
<option <?php if($_GET[sel] == 'four') echo"selected"; ?> > four </option>
but the problem is, I need to save those options in a variable because I have a lot of options and I need to call that variable many times.
但问题是，我需要将这些选项保存在一个变量中，因为我有很多选项，我需要多次调用该变量。
Is there a way to make that option be selected where value = $_GET[sel]?
有没有办法让那个选项被选中value = $_GET[sel]？
回答by Sirko
Just use the array of options, to see, which option is currently selected.
只需使用选项数组即可查看当前选择了哪个选项。
$options = array( 'one', 'two', 'three' );
$output = '';
for( $i=0; $i<count($options); $i++ ) {
$output .= '<option '
. ( $_GET['sel'] == $options[$i] ? 'selected="selected"' : '' ) . '>'
. $options[$i]
. '</option>';
}
Sidenote: I would define a value to be some kind of id for each element, else you may run into problems, when two options have the same string representation.
旁注：我会为每个元素定义一个值作为某种 id，否则当两个选项具有相同的字符串表示时，您可能会遇到问题。
回答by Mohit Mehta
foreach($array as $value=>$name)
{
if($value == $_GET['sel'])
{
echo "<option selected='selected' value='".$value."'>".$name."</option>";
}
else
{
echo "<option value='".$value."'>".$name."</option>";
}
}
回答by Muhammad Fahad
This is simple example by using ternary operator to set selected=selected
这是使用三元运算符设置 selected=selected 的简单示例
<?php $plan = array('1' => 'Green','2'=>'Red' ); ?>
<select class="form-control" title="Choose Plan">
<?php foreach ($plan as $key => $value) { ?>
<option value="<?php echo $key;?>" <?php echo ($key == '2') ? ' selected="selected"' : '';?>><?php echo $value;?></option>
<?php } ?>
</select>
回答by TRiG
foreach ($array as $value => $name) {
echo '<option value="' . htmlentities($value) . '"' . (($_GET['sel'] === $value) ? ' selected="selected"') . '>' . htmlentities($name) . '</option>';
}
This is fairly neat, and, I think, self-explanatory.
这相当简洁，而且我认为不言自明。
回答by Rob
You're missing quotes for $_GET['sel']- fixing this might help solving your issue sooner :)
您缺少引号$_GET['sel']- 修复此问题可能有助于更快地解决您的问题:)
