How to write the action attribute of WordPress form tag

Let’s first introduce the meaning of the action attribute of the form tag:

The action attribute stipulates that when the form is submitted, Where to send form data. (It is a required attribute)

Introduction to attribute values: (Look at the picture)

You are familiar with the meaning and syntax of the action attribute, now let Let's take a look at an example:

The following form has two input fields and a submit button. When the form is submitted, the form data will be submitted to the page named "form_action.asp":

<form action="form_action.asp" method="get">
  <p>这里输名字: <input type="text" name="fname" /></p>
  <p>接着输名字: <input type="text" name="lname" /></p>
  <input type="submit" value="Submit" />
</form>

Rendering: (Look at the picture again)

Related recommendations: "WordPress Tutorial"

Form's action attribute (Action) and confirmation button

When the user clicks the confirmation button, the content of the form will be transferred to another file. The form's action attribute defines the file name of the destination file. The file defined by the action attribute usually performs related processing on the input data received.

<form name="input"
action="html_form_action.asp" method="get">

Username:

<input type="text" name="user" />
<input type="submit" value="点这里提交" />
</form>

The browser displays the effect as shown

If you type a few letters in the text box above , and then click the Confirm button, then the input data will be sent to the "html_form_action.asp" page. This page will display the entered results.

Explanation of the action attribute of the form tag:

1.action="" and action="#", without the action attribute, have the same effect, both are submitted Go to the current page (that is, document.location.href)

2.action="currentPage.xxx": If currentPage.xxx represents the current page, submit it to the current page, and colleagues will jump to the current page. Of course You cannot see the change of the url; if currentPage.xxx is a non-current page, it will be submitted to the non-current page and also jump to the non-current page

3. When the form is submitted to itself, action="" and action= The difference between "currentPage.xxx":

Usually to save trouble, we usually set the action attribute of the form to action=""/action="#", or not write it at all, but this will cause a problem, In fact, when the action is set to action="", the page actually submitted when the form is submitted is action="currentPage.xxx?arguments=values&….", that is, if the current page has parameters, the parameters will also be submitted. And the priority of the parameters will be higher than the parameters submitted by the

control, that is, if the arguments in action="currentPage.xxx?arguments=values&…." have the same name as the

element, when getting the value The action="currentPage.xxx?arguments=values&…." value will overwrite the value of

and get incorrect values ​​from the page.

Example: The SpecTop.asp page is the page where the form is to be submitted, and there are parameters passed from the upper-level page

action="" The page when actually submitted: SpecTop.asp?ClassID=000100200005&SpeID =947&SpeType=3

If there is in

, the value obtained when submitting will be 947, and It’s not 1000, but action="currentPage.xxx" can get 1000

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