A form of 2 buttons, PHP background How to determine which button is submitted

Method One:

<Divclass= "Container theme-showcase"role= "Main">    <formclass= "Form-horizontal"Method= "POST"Action= "<?php echo base_url ("manage/audit/user ");?>"><Divclass= "Form-group">            <labelclass= "Col-sm-2 Control-label">User name</label>            <Divclass= "Col-sm-10">                <Pclass= "Form-control-static"><?php echo $user [' user_name '];?></P>            </Div>        </Div>        ................................        <HR>        <Divclass= "Row">            <Divclass= "Col-xs-6"><Buttontype= "Submit"name= "Audit_btn"value= "PASS"class= "btn btn-success pull-right">Audit through</Button></Div>            <Divclass= "Col-xs-6"><Buttontype= "Submit"name= "Audit_btn"value= "NoPass"class= "btn btn-danger pull-left">Audit does not pass</Button></Div>        </Div>        <inputtype= "hidden"name= "user_id"value= "<?php echo $user [' user_id '];?>" />    </form></Div> <!--/container -

 /** * User Audit*/     Public functionAudit_user () {$audit _btn=$this->input->post (' audit_btn ',TRUE); if("PASS" = =$audit _btn) {            //Audit through            $user _audit_status= ' audited '; //Message Content            $msg= ' User certification audit has passed, please click to view the status of certification! ‘; }        if("nopass" = =$audit _btn){            //audit does not pass            $user _audit_status= ' audit_failed '; $msg= ' User authentication audit failed, please click to view the status of certification! ‘; }        $user _id=$this->input->post (' user_id ',TRUE); ..............................    }

Method Two:

You can set the button to a name example:
<input type= "Submit" name= "Submit" value= "Submission"/>
<input type= "Submit" Name= "Submit2" value= "Submit 2" >
If it is a post submission

In PHP, you can use the
<?php
if (!empty ($_post[' submit ')) {
Echo ' Click to submit ';
} elseif (!empty ($_post[' submit2 ')) {
Echo ' Click is submit 2 ';
}
?>

A form of 2 buttons, PHP background How to determine which button is submitted