PHP Codeigniter：下拉菜单上的 set_value
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PHP Codeigniter: set_value on dropdown menu
提问by Jess McKenzie
I have the following view but how do I apply set_valueto it without it defaulting to Please select?
我有以下视图，但如何在set_value不默认为请选择的情况下应用它？
<label for="add_fields_type">Type: </label>
<select name="add_fields_type" id="add_fields_type">
<option value="">Please Select</option>
<option value="<?php echo set_value('input'); ?>">Input</option>
<option value="<?php echo set_value('textarea'); ?>">Text Area</option>
<option value="<?php echo set_value('radiobutton'); ?>">Radio Button</option>
<option value="<?php echo set_value('checkbox'); ?>">Check Box</option>
</select>
Update:
更新：
View:
看法：
<label for="add_fields_placeholder">Placeholder: </label>
<select name="add_fields_placeholder" id="add_fields_placeholder">
<option value="">Please Select</option>
<option value="<?php echo set_value('yes'<?php echo set_select('add_fields_placeholder','yes', ( !empty($placeholderType) && $placeholderType == "yes" ? TRUE : FALSE ));?>">Yes</option>
<option value="<?php echo set_value('no' <?php echo set_select('add_fields_placeholder','no', ( !empty($placeholderType) && $placeholderType == "no" ? TRUE : FALSE )); ?>">No</option>
</select>
<label for="add_fields_placeholderValue">Placeholder Text: </label>
<input type="text" name="add_fields_placeholderValue" id="add_fields_placeholderValue" value="<?php echo set_value('add_fields_placeholderValue'); ?>">
<label for="add_fields_type">Type: </label>
<select name="add_fields_type" id="add_fields_type">
<option value="">Please Select</option>
<option value="input" <?php echo set_select('add_fields_type','input', ( !empty($fieldType) && $fieldType == "input" ? TRUE : FALSE )); ?>>Input</option>
<option value="textarea" <?php echo set_select('add_fields_type','textarea', ( !empty($fieldType) && $fieldType == "textarea" ? TRUE : FALSE )); ?>>Text Area</option>
<option value="radiobutton" <?php echo set_select('add_fields_type','radiobutton', ( !empty($fieldType) && $fieldType == "radiobutton" ? TRUE : FALSE )); ?>>Radio Button</option>
<option value="checkbox" <?php echo set_select('add_fields_type','checkbox', ( !empty($data) && $data == "checkbox" ? TRUE : FALSE )); ?>>Check Box</option>
</select>
Controller:
控制器：
$data['fieldType'] = $this->input->get('add_fields_type');
$data['placeholderType'] = $this->input->get('add_fields_placeholder');
Line 16:
第 16 行：
<option value="<?php echo set_value('yes'<?php echo set_select('add_fields_placeholder','yes', ( !empty($placeholderType) && $placeholderType == "yes" ? TRUE : FALSE ));?>">Yes</option>
回答by M. Ahmad Zafar
This should help:
这应该有帮助：
Controller (test.php)
控制器（test.php）
<?php
class Setup extends CI_Controller {
function index() {
//for the set_select() function
$this->load->library('form_validation');
//for base_url() function
$this->load->helper('url');
$list['data'] = $this->input->get('add_fields_type');
$this->load->view('test_view.php', $list);
}
?>
View (test_view.php)
查看（test_view.php）
<!DOCTYPE HTML>
<html>
<body>
<form action="<?php echo base_url(); ?>test">
<label for="add_fields_type">Type: </label>
<select name="add_fields_type" id="add_fields_type">
<option value="">Please Select</option>
<option value="input" <?php echo set_select('add_fields_type','input', ( !empty($data) && $data == "input" ? TRUE : FALSE )); ?>>Input</option>
<option value="textarea" <?php echo set_select('add_fields_type','textarea', ( !empty($data) && $data == "textarea" ? TRUE : FALSE )); ?>>Text Area</option>
<option value="radiobutton" <?php echo set_select('add_fields_type','radiobutton', ( !empty($data) && $data == "radiobutton" ? TRUE : FALSE )); ?>>Radio Button</option>
<option value="checkbox" <?php echo set_select('add_fields_type','checkbox', ( !empty($data) && $data == "checkbox" ? TRUE : FALSE )); ?>>Check Box</option>
</select>
<input type="submit" />
</form>
</body>
</html>
Note:The third parameter of the set_select()determines whether it should be selected or not
注意：的第三个参数set_select()决定是否应该选择
回答by Tony Ciccarone
Sort of what Abid said, you'd simply use set_value() after your form validation.
就像 Abid 所说的那样，您只需在表单验证后使用 set_value() 即可。
form_dropdown('add_fields_type', $field_types, set_value('field_type'));
回答by WatsMyName
Try this:
尝试这个：
<option value="<?php echo set_value('textarea'); ?>" <?php echo (set_value('textarea')=='TEXTAREA')?" selected=' selected'":""?>>Text Area</option>
Above TEXTAREA is the value you are expected to come on the option
高于 TEXTAREA 是您希望在该选项上获得的值
回答by Abid Hussain
Try this :-
尝试这个 ：-
See url:-- http://codeigniter.com/user_guide/helpers/form_helper.html
见网址：-- http://codeigniter.com/user_guide/helpers/form_helper.html
$options = array(
'small' => 'Small Shirt',
'med' => 'Medium Shirt',
'large' => 'Large Shirt',
'xlarge' => 'Extra Large Shirt',
);
$shirts_on_sale = array('small', 'large');
echo form_dropdown('shirts', $options, 'large');
// Would produce:
// 会产生：
<select name="shirts">
<option value="small">Small Shirt</option>
<option value="med">Medium Shirt</option>
<option value="large" selected="selected">Large Shirt</option>
<option value="xlarge">Extra Large Shirt</option>
</select>
echo form_dropdown('shirts', $options, $shirts_on_sale);
// Would produce:
// 会产生：
<select name="shirts" multiple="multiple">
<option value="small" selected="selected">Small Shirt</option>
<option value="med">Medium Shirt</option>
<option value="large" selected="selected">Large Shirt</option>
<option value="xlarge">Extra Large Shirt</option>
</select>
回答by NULL pointer
To use set_select you need to have a validation rule for the field in question. See my answer to a similar question here: CodeIgniter select_value in form_dropdown
要使用 set_select，您需要为相关字段设置验证规则。在此处查看我对类似问题的回答： CodeIgniter select_value in form_dropdown
回答by Sanoj Dushmantha
it is much easier to use javascript(tested)
使用 javascript 更容易（已测试）
<select name="add_fields_type" id="add_fields_type">
<option value="">Please Select</option>
<option value="Input">Input</option>
<option value="Text Area">Text Area</option>
<option value="Radio Button">Radio Button</option>
<option value="Check Box">Check Box</option>
</select>
<script>
document.getElementById('select_status').value="<?php echo set_value('status'); ?>";
</script>
