php Codeigniter中单选按钮的设置值

Setting value of radio button in Codeigniter

提问by Jenz

In my form for editing details, I have a radio button with values 0and 1. What I want is, while the form is loaded ie, when user clicks on editlink, the radio button should be set to the value in the database. Once the user have changed it and submit the form, it should retain the submitted value. How this is possible ?

在我用于编辑详细信息的表单中，我有一个带有值0和1. 我想要的是，在加载表单时，即当用户单击edit链接时，应将单选按钮设置为数据库中的值。一旦用户更改它并提交表单，它应该保留提交的值。这怎么可能？

I tried with the below code and it doesn't worked. I know that it can't be done this way. $row->videotypehave the value from database.

我尝试了下面的代码，但没有用。我知道这样是不行的。$row->videotype具有来自数据库的值。

<input type="radio" name="trailer" value="1" <?php 
    if(set_radio('trailer', '1', TRUE)) {
        echo set_radio('trailer', '1', TRUE); 
    } else { 
        if($row->videotype==1) ?> checked=checked <?php 
    } ?> />Yes
<input type="radio" name="trailer" value="0" <?php 
    if(set_radio('trailer', '0')) {
        echo set_radio('trailer', '0');  
    } else {
        if($row->videotype==0) ?> checked=checked <?php 
    } ?> />No

In form submission function (in controller) , I have set this for form validation :

在表单提交功能（在控制器中）中，我已将其设置为表单验证：

$this->form_validation->set_rules('trailer', 'Trailer', 'is_numeric');  

Can anyone help me to fix this? Thanks in advance.

谁能帮我解决这个问题？提前致谢。

回答by Girish

The set_valuefunction will useful in edit form validation, try this way

该set_value功能在编辑表单验证中很有用，试试这种方式

<input type="radio" name="trailer" value="1" <?php 
    echo set_value('trailer', $row->videotype) == 1 ? "checked" : ""; 
?> />Yes

<input type="radio" name="trailer" value="0" <?php 
    echo set_value('trailer', $row->videotype) == 0 ? "checked" : ""; 
?> />No

In the controller the validation rules fine, please also use trim rule in case post data have blank space

在控制器中，验证规则很好，如果帖子数据有空格，也请使用修剪规则

$this->form_validation->set_rules('trailer', 'Trailer', 'trim|is_numeric');  

EDIT: the set_radiofunction create issue in edit mode form validation please use set_valuefunction

编辑：set_radio编辑模式表单验证中的函数创建问题请使用set_value函数

回答by Paul Gregory

The set_radiois a poorly documented CI function. You're not using it right. You're better off not using it. This is simpler:

这set_radio是一个记录不足的 CI 功能。你没有正确使用它。你最好不要使用它。这更简单：

<input type="radio" name="trailer" value="1" <?php if($row->videotype==1) ?> checked=checked <?php } ?> />Yes
<input type="radio" name="trailer" value="0" <?php if($row->videotype==0) ?> checked=checked <?php } ?> />No

回答by Yatin Mistry

Check below for default value check

检查下面的默认值检查

<?php
    echo $gender = $this->input->post('gender');
    if($gender=='male' || empty($gender)) $mchecked=true;
    else if($gender=='female') $fchecked=true;
?>  
<?php echo form_label('Gender: ', 'gender'); ?><br />
    <?php echo form_radio('gender', 'male', @$mchecked, 'id=male').form_label('Male', 'male'); ?>
    <?php echo  form_radio('gender', 'female', @$fchecked, 'id=female').form_label('Female','female'); ?>

回答by Zeeshan

You can use the form_validation library and do this in a much elegant way.

您可以使用 form_validation 库并以非常优雅的方式执行此操作。

You can use the form_radio()with set_radio()as follows:

您可以使用form_radio()withset_radio()如下：

$this->load->library('form_validation');
echo form_radio('trailer', '1', set_radio('trailer', '1', $row->videotype === "1" ? TRUE : FALSE));
echo form_radio('trailer', '0', set_radio('trailer', '0', $row->videotype === "0" ? TRUE : FALSE));

This works for me on Codeigniter 3 on PHP 5.6, should work on other versions too.

这适用于 PHP 5.6 上的 Codeigniter 3，也适用于其他版本。

回答by bharat

Using codeignitor form function:

使用 codeignitor 表单函数：

<?php $selected = 'Yes'; ?>
<?php echo form_label('Trailer: ', 'trailer'); ?>
<?php echo form_label('Yes', 'trailer_yes') . form_radio(array('name' => 'trailer', 'value' => 'Yes', 'checked' => ('Yes' == $selected), 'id' => 'trailer_yes')); ?>&nbsp;&nbsp;
<?php echo form_label('No', 'trailer_no') . form_radio(array('name' => 'trailer', 'value' => 'No', 'checked' => ('No' == $selected), 'id' => 'trailer_no')); ?>
<?php echo form_error('trailer'); ?>