I have in my 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
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>
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.
Is there a way to make that option be selected where value = $_GET[sel]
?
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>';
}
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.
foreach($array as $value=>$name)
{
if($value == $_GET['sel'])
{
echo "<option selected='selected' value='".$value."'>".$name."</option>";
}
else
{
echo "<option value='".$value."'>".$name."</option>";
}
}
This is simple example by using ternary operator to set selected=selected
<?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>
You could create a function and then add it to each option field to print the selected="selected".
Example
<option value="PHP" ' . tsw_selected('PHP', $row['anchor']) . '>PHP/PDO/SQL[+]</option>
<option value="HTML" ' . tsw_selected('HTML', $row['anchor']) . '>HTML/CSS</option>
Then your fun:
function tsw_selected( $opt, $val )
{
$sel = '';
$opt = ('' != $opt ) ? $opt : 'OTHER';
if( $opt == $val ) $sel = true;
if ( $sel ) {
return 'selected="selected"'; } else { return ''; }
}
This will echo the select="selected" per true and echo '' (nothing) for false. You could set $sel = false, but it does not matter. Booloean checks on empty as false.
你错过了$_GET['sel']
引号 - 修复这个可能有助于尽快解决你的问题:)
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.
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