如果值与函数匹配，如何从下拉列表中选择值？

编程问答 2022-06-07

问题描述

如果值与函数生成的值匹配，如何从下拉列表中选择值？例如，如果$match value is 08:00条件应该从下拉列表中选择值，则无法选择该值？

PHP函数 

function create_time_range($start,$end,$interval = '15 mins',$format = '12') {
$startTime = strtotime($start);
$endTime   = strtotime($end);
$returnTimeFormat = ($format == '12')?'H:i':'H:i';

$current   = time();
$addTime   = strtotime('+'.$interval,$current);
$diff      = $addTime - $current;

$times = array();
while ($startTime < $endTime) {
    $times[] = date($returnTimeFormat,$startTime);
    $startTime += $diff;
}
$times[] = date($returnTimeFormat,$startTime);
return $times;
}

$times= create_time_range('00:00','23:45','15 mins');

$match = '08:00';

HTML 

<select name="time_picker">
<option value="">Select Time</option>
<?PHP foreach($times as $key=>$val){ ?>

    <?PHP
    if (in_array($match,$times))
    {
        $selected = 'selected';
    }
    ?>

  <option <?PHP echo $selected ?> value="<?PHP echo $val; ?>"><?PHP echo $val; ?></option>
<?PHP } ?>
</select>

解决方法

将您的html部分更新为关注

<select name="time_picker">
<option value="">Select Time</option>
<?php foreach($times as $key=>$val){ 
  $selected = $match===$val ? 'selected' : '';
?>
  <option <?php echo $selected ?> value="<?php echo $val; ?>"><?php echo $val; ?></option>
<?php } ?>
</select>
dropdownoptionselectselect