Question

这里我有一个数组，我想使用php确认第一个键值默认值

我的数组--- print_r（$ compoItem）;

  Array
(
    [0] => Rice+chapathi
    [1] => Chappathi
    [2] => Pepsi
    [3] => 7up
)

我的HTML

<?php
    $compoItem = explode(',',$sql2['combo']);

    foreach($compoItem as $comValues)
    {
    ?>
    <div class="radio">

      <ul><input type="radio" name="optradio" checked=""><?php echo $comValues?></ul>

     </div>
      <?php } ?>

这里最后的keu值是deafult check但是对我来说不想要最后一个值我想要键值是默认选中的，怎么能这样做？

Answer 1

根据数组中的索引回显属性。

<?php
    $compoItem = explode(',',$sql2['combo']);    
    foreach($compoItem as $i => $comValues){
    //                 ---^^^^^---
?>
<div class="radio">    
  <ul><input type="radio" name="optradio" <?php if($i == 0){ echo 'checked="checked"'; }?>><?php echo $comValues?></ul>    
</div>
<?php } ?>

Answer 2

<?php
    $compoItem = explode(',',$sql2['combo']);
    $first = true;

    foreach ( $compoItem as $comValues )
    {
       $checked = ( $first ) ? 'checked="checked"' : "";
    ?>



     <div class="radio">

          <ul><input type="radio" name="optradio" <?php echo $checked; ?>><?php echo $comValues?></ul>

     </div>
<?php 
       $first = false;
     } ?>

如何使用php检查第一个键值默认值

2 个答案: