html选择选项SELECTED [英] html select option SELECTED
问题描述
我在php中有
I have in my php
$sel = "
<option> one </option>
<option> two </option>
<option> thre </option>
<option> four </option>
";
假设我有一个内联网址= site.php?sel = 1
let say I have an inline URL = site.php?sel=one
如果我没有在变量中保存这些选项,我可以通过这种方式来使其中一个选项成为SELECTED,其中值等于 $ _ GET [sel]
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 $_GET[sel]
<option <?php if($_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>
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。
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.
有没有办法让选项被选中,其中 value = $ _GET [sel]
?
Is there a way to make that option be selected where value = $_GET[sel]
?
推荐答案
只需使用数组选项,即可查看当前选中的选项。 p>
Just use the array of options, to see, which option is currently selected.
$options = array( 'one', 'two', 'three' );
$output = '';
for( $i=0; $i<count($options); $i++ ) {
$output .= '<option '
. ( $_GET['sel'] == $options[$i] ? 'selected="selected"' : '' ) . '>'
. $options[$i]
. '</option>';
}
旁注:我将定义一个值为某种id对于每个元素,否则当两个选项具有相同的字符串表示形式时,您可能会遇到问题。
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