Question

所以，我有一个HTML表单，我需要将它的值作为参数发送到php函数，但我还需要一个不同的值，甚至不在HTML中。

例如：

<form action="methods.php" method="register"> 
   <input type="text" placeholder="EventID"> 
   <input type="submit" value="Register"> 
</form>

此表单将获取事件ID并将其作为参数发送，以将用户注册到事件中。但我还需要将用户作为参数发送（function register($user, $eventid)），我不知道如何这样做。

我确实在这里发现了类似的东西，但它们与POST和GET有关，我不确定它们是否对我有效，我无法理解如何在我的情况下使用它们，所以如果有人能帮助我的话out，pleaaaaaase，我真的很感激

Answer 1

在下面的评论中查找解释：

＆＃13;

//<![CDATA[
// external.js
var post, doc, bod, htm, C, E, T; // for use on other loads
addEventListener('load', function(){ // load

// used in post function below to create String from Object
function phpEncode(obj){
  var r = [];
  if(obj instanceof Array){
    for(var i=0,l=obj.length; i<l; i++){
      r.push(phpEncode(obj[i]));
    }
    return '%5B'+r.join(',')+'%5D';
  }
  else if(typeof obj === 'object' && obj){
    for(var i in obj){
      if(obj.hasOwnProperty(i)){
        var v = obj[i], s;
        if(typeof v === 'object' && v){
          s = encodeURIComponent('"'+i.replace('"', '\\"')+'":')+phpEncode(v);
        }
        else{
          v = typeof v === 'string' ? '"'+v.replace('"', '\"')+'"' : v;
          s = encodeURIComponent('"'+i.replace('"', '\\"')+'":'+v);
        }
        r.push(s);
      }
    }
    return '%7B'+r.join(',')+'%7D';
  }
  else{
    r = typeof obj === 'string' ? '"'+obj.replace('"', '\\"')+'"' : obj;
    return ''+r;
  }
}
// used in post function below to evaluate (make into code) JSON String that comes back from PHP
function phpAccept(url){
  return eval('('+decodeURIComponent(url)+')');
}
// here is an example of a post AJAX function
post = function(send, where, success, context){
  var x = new XMLHttpRequest;
  var c = context || this;
  x.open('POST', where); x.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
  x.onreadystatechange = function(){
    if(x.readyState === 4 && x.status === 200){
      if(success)success.call(c, phpAccept(x.responseText));
    }
  }
  if(typeof send === 'object' && send && !(send instanceof Array)){
    var r = [];
    for(var p in send){
      r.push(encodeURIComponent(p)+'='+phpEncode(send[p]));
    }
    x.send(r.join('&'));
  }
  else{
    throw new Error('send must be an Object');
  }
  return x;
}
// yes, you can do this - just remember that non-primitive values are the actual Object through assingment
doc = document; bod = doc.body; htm = doc.documentElement;
// simple way to create an Element by tag
C = function(tag){
  return doc.createElement(tag);
}
// simple way to document.getElementById()
E = function(id){
  return doc.getElementById(id);
}
T = function(tag){
  return doc.getElementsByTagName(tag);
}
var form = E('form'), sub = E('sub'), i1 = E('i1'), i2 = E('i2');
// prevent old school submission
form.addEventListener('submit', function(ev){
  ev.preventDefault(); // prevents submission
});
// just for testing remove below
var tS = E('test_out').style;
// remove above
// ajax submisson
sub.addEventListener('click', function(){
  /* note that if the Elements are not removed from or added
     to the DOM you don't need to get them again Element.value
     will probably be different so you'll want to get them
     on every click
  */
  post({phpProp1:i1.value, phpProp2:i2.value}, 'yourPHPajaxResponsePage.php', function(data){
    /* before data comes back yourPHPajaxResponsePage.php may look like this:
    <?php
    session_start(); // super common - read up on it - not needed here - but won't hurt
    if(isset($_POST['phpProp1'], $_POST['phpProp2'])){
      // usually you affect MySQL using PHP at this point
      // we'll just send them back in this lame example
      $res = array('jsProp1' => $_POST['phpProp1'], 'jsProp2' => $_POST['phpProp2']);
      // makes results come back as JSON
      echo json_encode($res);
    }
    ?>
    */
    if(data){ // may want more conditions
      E('out').innerHTML = data.jsProp1+'<br />'+data.jsProp2;
    }
  }, this);
  // just for testing - remove below
  tS.display = 'block';
  E('temp_res').innerHTML = i1.value+'<br />'+i2.value;
  // remove above
});
// testing only remove below
var ins = doc.querySelectorAll('input[type=text]');
for(var i=0,l=ins.length; i<l; i++){
  ins[i].addEventListener('focus', function(){
    tS.display = 'none';
  });
}
// remove above
form.addEventListener('keydown', function(ev){
   // if user hits enter
  if(ev.keyCode === 13)sub.click();
});

}); // end load
//]]>

＆＃13;

/* external.css */
html,body{
  padding:0; margin:0;
}
.main{
  width:980px; margin:0 auto;
}
#form{
  width:266px; color:#fff; background:green; padding:10px; 
}
#form>div>label{
  display:block; float:left; width:57px;
}
#form>div>input{
  width:203px;
}
#form>div{
  margin-bottom:10px;
}
#form>#sub{
  display:block; margin:0 auto;
}
/* remove below - testing only */
#test_out{
  display:none;
}
#test_out>div:first-child{
  color:red;
}

＆＃13;

<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml' xml:lang='en' lang='en'>
  <head>
    <meta http-equiv='content-type' content='text/html;charset=utf-8' />
    <title>AJAX Example</title>
    <link type='text/css' rel='stylesheet' href='external.css' />
    <script type='text/javascript' src='external.js'></script>
  </head>
<body>
  <div class='main'>
    <form id='form'>
      <div><label for='i1'>Input 1</label><input id='i1' name='i1' type='text' value='' /></div>
      <div><label for='i2'>Input 2</label><input id='i2' name='i2' type='text' value='' /></div>
      <input id='sub' type='button' value='submit' />
    </form>
    <div id='out'></div>
    <!-- for testing remove below -->
    <div id='test_out'><div>Must have PHPServer code in JavaScript Comments to get real results</div><div id='temp_res'></div></div>
    <!-- remove above -->
  </div>
</body>
</html>

＆＃13;

您怎么看？

Answer 2

非常简单，你只需要处理一些事情。

1：每个输入字段都应该有一个名称。

2：设置表单方法GET（发送值在网址中可见）或POST（发送数据而不显示在网址中）

3：在methods.php上接收表格数据，如果通过GET然后发送$ _GET ['input_field_name']或通过POST然后$ _POST ['input_field_name']

Answer 3

您可以使用隐藏字段，也可以为用户使用会话或Cookie

<form action="methods.php" method="post"> 
   <input type="hidden" name="txtuser" value="abc"> 
   <input type="text" placeholder="EventID"> 
   <input type="submit" value="Register"> 
</form>

如果您使用cookie或会话，则无需将其作为参数传递为全局变量，因此您可以直接在任何页面上访问其值，您只需要将值存储到它并在项目的任何位置访问它。

将2个或更多参数从HTML表单传递到PHP函数

3 个答案: