如何创建时间下拉列表? [英] How to create a dropdown of time?

问题描述

我想在PHP中创建一个下拉列表.它应该是24小时格式，间隔为30分钟，例如00:00然后00:30然后13:00等等，我希望它全天候运行.

I want to create a dropdown for time in PHP. It should be of 24 hour format with an interval of 30 minutes like 00:00 then 00:30 then 13:00 and so on.I want it round the clock.

我已经使用了这段代码

<?php 
    $start = strtotime('12:00 AM');
    $end   = strtotime('11:59 PM');
?>
<select style="width:85px;" name="select1" id="select1">
    <?php for($i = $start;$i<=$end;$i+=1800){ ?>  
        <option value='<?php echo date('G:i', $i); ?>'><?php echo date('G:i', $i); ?></option>;
    <?php } ?>
</select>

问题在于，由于增量值超出结尾，因此无法覆盖11:30到12:00 AM的最后一个跨度，在PHP中有直接的方法吗?

The problem is that it doesn't cover the last span of 11:30 to 12:00 AM as the increment value exceeds the end, Is there a direct way to do this in PHP?

推荐答案

嗯，将来我们的时钟突然增加25小时的可能性极小，因此正常循环应该可以:

Uhm, it is extremely unlikely that in the future, our clocks suddenly gain a 25th hour, so a normal loop should do fine:

for($hours=0; $hours<24; $hours++) // the interval for hours is '1'
    for($mins=0; $mins<60; $mins+=30) // the interval for mins is '30'
        echo '<option>'.str_pad($hours,2,'0',STR_PAD_LEFT).':'
                       .str_pad($mins,2,'0',STR_PAD_LEFT).'</option>';

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