textbox onchange call php function [duplicate]

问题

This question already has answers here:

Call php function from JavaScript (4 answers)

Closed 5 years ago.

How can i call a php function from onchange on an html form textbox? I have tried

<input onchange="phpfunction()" ..... >

<?php
function phpfunction() {
my function
}
?>

Any Help? I Can't seem to figure it out.

Thank You

回答1:

You have to do an ajax call and post that your PHP.

Example:

HTML:

<input name="blah" onchange="mainInfo(this.value);">

Javascript Function (AjaX)

function mainInfo(id) {
    $.ajax({
        type: "GET",
        url: "dummy.php",
        data: "mainid =" + id,
        success: function(result) {
            $("#somewhere").html(result);
        }
    });
};

PHP

<?php
    if(isset($_GET['mainid'])){
        mainInfo($_GET['mainid']);
    }
?>

回答2:

You can't execute PHP in the browser.

Do an AJAX call or POST to a PHP function on the web server, or write a Javascript function that executes in the browser.

回答3:

you need to do it with JavaScript and send request to server. As HTML runs on client and php on sever.

回答4:

you need to use jquery for this , cant use php on client

 <input onchange="callphpfunction()" ..... >
 <script>
 callphpfunction(){

 $.post("file.php",function(data){

 alert(data);
 });
 }

 </script>

file.php

    <?php
     function phpfunction() {
        echo $data;
   }
  phpfunction();
 ?>

来源：https://stackoverflow.com/questions/26148325/textbox-onchange-call-php-function