如何获取复选框 [英] How to fetch checkbox

问题描述

这是我的HTML代码:

This is my HTML code:

<input type='checkbox' name='cbox[]' value='Jaywalking'/> 
Jaywalking<br/>
<input type='checkbox' name='cbox[]' value='Littering'/> 
Littering<br/>
<input type='checkbox' name='cbox[]' value='Illegal Vendor'/> 
Illegal Vendor

这是我的邮递区号:

if(is_array($_POST['cbox'])) 
   $violation_save=implode(',',$_POST['cbox']); 
else 
   $violation_save=$_POST['cbox'];

mysql_query("UPDATE tblcitizen SET violation='$violation_save' WHERE id='$id'") or die mysql_error());

如何从数据库中获取选定的值?

How can I fetch the selected values from the database?

推荐答案

首先，您不应该再使用php的mysql_ *函数.这些功能被标记为已弃用，并将在下一个主要的php版本中删除.

First of all you should NOT use the mysql_* functions of php anymore. These functions are marked as deprecated and will be removed in the next major php release.

因此，如果$ _POST ['cbox']是一个数组，则必须将其作为数组处理.

So if $_POST['cbox'] is an array, you must handle it as an array.

// how to save checked values
try {
    $db = new PDO(...);
    $stmt = $db->prepare("UPDATE yourTable SET myField = :myField WHERE id = :id");
    $stmt->bindParam(':id' , $id, PDO::PARAM_INT);

    foreach ($_POST['cbox'] as $myField) {
        $stmt->bindParam(':myField', $myField);
        $stmt->execute();
    }
} catch (PDOException $e) {
    // error handling
}

// how to fetch checked values
try {
    $myValues = array();
    $db = new PDO(...);
    $stmt = $db->prepare("SELECT myField FROM myTable WHERE id = :id");
    $stmt->bindParam(':id', $id, PDO::PARAM_INT);
    $stmt->execute();

    foreach ($stmt->fetchAll(PDO::FETCH_ASSOC) as $row) {
        $myValues[] = $row['myField'];
    }
} catch (PDOException $e) {
    // error handling
}

// HTML Part
<input type="checkbox" name="cbox[]" value="bla"<?php if (in_array('bla', $myValues)) { ?> checked="checked"<?php } ?> />

只需看一下PDO或MySQLi扩展的php手册.

Just have a look at the php manual for PDO or the MySQLi extension.

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