Multi选中MySQL数据的复选框，用逗号（，）

Question

有更新表单所以我需要，如果某些复选框输入已经根据MySQL数据进行了检查，那么它将显示已检查。

<?php 
$statement = $db->prepare("SELECT leavingEquipment FROM orderform WHERE orderNo='$orderNo'");  // here are the checked data 
$statement->execute();
$result = $statement->fetchAll(PDO::FETCH_ASSOC);
    foreach($result as $row4){
        $leavingEquipment = explode(", ",$row4['leavingEquipment']); // Here I use explode I check this with var_dump 
        $statement = $db->prepare("SELECT * FROM equipment"); // here all equipment 
        $statement->execute();
        $result = $statement->fetchAll(PDO::FETCH_ASSOC);
            foreach($result as $row3) {
                $leavingEquipment3=$row3['equipmentTitle'];
                ?>
            <input type="checkbox" name="leavingEquipment[]" value="<?php echo $row3['equipmentTitle']; ?>" <?php if($leavingEquipment==$leavingEquipment3) echo 'checked'; ?>><label class="control-label"><?php echo $row3['equipmentTitle']; ?></label>
                <?php
             }
    }
?>

Var_dum输出如下： array（2）{[0] =＆gt; string（9）“Bluetooth”1 =＆gt; string（6）“casing”}

它显示如下：

但我需要这样：

先谢谢。

Answer 1

见这里，

<input ... name="leavingEquipment[]" } value="<?php echo $row3['equipmentTitle']; ?>" <?php if($leavingEquipment==$leavingEquipment3) echo 'checked'; ?>> ...
                                     ^ a lone closing bracket                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

您正在将数组$leavingEquipment与字符串$leavingEquipment3进行比较。

而是使用in_array()函数来检查是否已经检查过复选框，即设备是否已在阵列中。所以你的内部foreach循环应该是这样的：

// your code

foreach($result as $row3) {
    $leavingEquipment3=$row3['equipmentTitle'];
    ?>
    <input type="checkbox" name="leavingEquipment[]" value="<?php echo $row3['equipmentTitle']; ?>" <?php if(in_array($leavingEquipment3, $leavingEquipment)){ echo " checked='checked'"; } ?>>
    <label class="control-label"><?php echo $row3['equipmentTitle']; ?></label>
    <?php
}

// your code