javascript - how can i call a php function using form submit -

i making registration form in php code , html form in same page , , have have java script validate fields, if validation done, need post data calling php , submit in database

if(isset($_post['name'])){ $order = "insert `reg_form`(`name`) values ('$_post[name]')"; $result = mysql_query($order, $db2);  if (!$result) {     echo("<br>input failed");  } else {     echo 'regestered !!!';  } }  <form name="register" id="register" class="b1 f_l" action="register.php"  method="post">  <div class="input-group" style="padding-top: 20px;">   <span class="label_1">name </span>   <input type="text" class="inp_t" placeholder="your name" name="name" id="name" required>  </div>   <div style="padding-top: 20px;">    <button type="submit" class="btn btn-primary register" value="submit"  >submit</button>  </div> </form>  <script language=javascript> $('#register').validator()    .submit(function(e){       var form = $(this);       var valid = form.validator({messageclass: "alert alert-danger validate_error", position: 'center right'});       if (valid.data("validator").checkvalidity()){           alert('not working');       }// valid       e.preventdefault();       return false; });// submit     </script> 

so want prevent default action if form not validated properly:

if (valid.data("validator").checkvalidity()) {     // assuming means validation failed     alert('not working');     e.preventdefault();     return false;  }  else  {     // it's working, let submission go through     return true;  } 

now need give submit button name php can know it

<button type="submit" name='submit-btn' class="btn btn-primary register" value="submit"  >submit</button> 

and lastly need update php script handle form submission. put script @ top of register.php file since that's form submitting to, , since you're submitting via post, check post array:

                            // submit button value check here if(isset($_post['submit-btn'] && $_post['submit-btn'] == "submit") {     // handle form submission here     // read data $_post array using name gave form elements     // create database connection , store data in database }