CakePHP:FormHelper 中选项的 "value"、 "default"和 "selected"之间的区别

Question

我正在查看 CakePHP 文档，关于表单和 FormHelper，我对为输入设置默认值的选项感到有点困惑。

来自文档:

默认选项(here):

$options['default'] Used to set a default value for the input field. The value is used if the data passed to the form does not contain a value for the field (or if no data is passed at all).

选择的选项(here):

$options['selected'] Used in combination with a select-type input (i.e. For types select, date, time, datetime). Set ‘selected’ to the value of the item you wish to be selected by default when the input is rendered:

稍后，对于 FormHelper::select ( here ):

Creates a select element, populated with the items in $options, with the option specified by $attributes['value'] shown as selected by default.

我唯一确定的是，我必须对复选框使用“checked”:

You cannot use default to check a checkbox - instead you might set the value in $this->request->data in your controller, or set the input option checked to true.

有没有人可以清楚地向我解释如何使用这些选项？非常感谢。

Answer 1

值:value的内容属性，即 <input value="Foo" />

默认:如果未提供默认值(例如 $this->request->data )。

Checked:复选框可以被选中，与value无关属性，即 <input type="checkbox" value="yes" checked="checked" />

希望对您有所帮助。