Question

我从一列数据库中获取值，如4,5,6,7,8，存储在

中

$sid=$user['std_list'];

我希望将它与另一个变量$ ctegoryy [＆＃39; id＆＃39;]进行比较，它具有相同的值，但在不同的行4,5,6,7,8中但在不同的行中。我的比较代码是

<?php   while($ctegoryy=mysql_fetch_array($rsultt)) { ?>

            <li style="text-transform: capitalize;">
            <?php if($ctegoryy['id']==$user['std_list']){
                ?>
            <input  name="std_list[]" type="checkbox" value="<?php echo $ctegoryy['id'];?>" checked>
            <?php }
            else {?>
            <input  name="std_list[]" type="checkbox" value="<?php echo $ctegoryy['id'];?>" /><?php
            } echo $ctegoryy['firstname']."&nbsp&nbsp".$ctegoryy['lastname'];?></li>
             <?php }?>

Answer 1

检查此解决方案，以便将数组值与单个变量

进行比较

<?php   
$sid=$user['std_list']; 

//from your question its look like you are receiving value in string  4,5,6,7,8. So need to convert in array. If its in array then you can skip following step
$sid = explode(",", $sid);


while($ctegoryy=mysql_fetch_array($rsultt)) { ?>

            <li style="text-transform: capitalize;">
            <?php if( in_array($ctegoryy['id'] , $sid)){ //PHP in built function to check value exist in array
                ?>
            <input  name="std_list[]" type="checkbox" value="<?php echo $ctegoryy['id'];?>" checked>
            <?php }
            else {?>
            <input  name="std_list[]" type="checkbox" value="<?php echo $ctegoryy['id'];?>" /><?php
            } echo $ctegoryy['firstname']."&nbsp&nbsp".$ctegoryy['lastname'];?></li>
             <?php }?>

Answer 2

首先获取行值并转换为数组

<?php
$access=explode(",",$row['std_list']);
if(in_array($ctegoryy['id'],$access)){ $d='t'; } else { $d='f'; }


<input  name="std_list[]" type="checkbox" value="<?php echo $ctegoryy['id'];?>" <?php if($d=="t") { ?> checked="checked" <?php } ?>/>

如何比较arrya值和单个变量？

2 个答案: