将数据发送到DB并通过AJAX返回

时间:2014-03-28 06:15:37

标签: php mysql ajax

以下代码正常运行,我正在使用它,因为我需要更新数据库中的一些注释而不刷新页面。 但是,当我需要在同一事件中获取一些数据时需要做什么?

index.php 应该发生变更

<?php
$s = $GET['...']
$p = $GET['...']
print '
 <form id="notesForm">
  <textarea name="c">'.$note.'</textarea>
  <input type="text" value="LAST_CHANGE_NEED_GIVE_BACK_FROM_DB">
  <input type="hidden" name="s" value="'.$s.'">
  <input type="hidden" name="p" value="'.$p.'">
  <input type="submit" value="save note">
  <div id="response"></div>
</form>
';
?>

脚本,它将数据发布到live_notes.php,可能因目标而被更改

$(document).ready(function(){
    $('#notesForm').submit(function(){
        event.preventDefault();
        $('#response').html("<b>saving...</b>");
        $.ajax({
            type: 'POST',
            url: 'notes/live_notes.php',
            data: $(this).serialize()
        })
        .done(function(data){
            $('#response').html(data);
        })
        .fail(function() {
            alert("bad luck");
        });
        return false;
    });
});

备注/ live_notes.php

<?php
$s = $_POST['s'];
$p = $_POST['p'];
$c = $_POST['c'];

// connecting DB

mysql_query("
UPDATE `poznamky`
SET
    last_change = now(),
    page = '$p',
    content = '$c'
WHERE
    page = '$p';
");

任何想法?

3 个答案:

答案 0 :(得分:1)

<?php
$s = $_POST['s'];
$p = $_POST['p'];
$c = $_POST['c'];

// connecting DB

$blnSuccess = mysql_query("
UPDATE `poznamky`
SET
    last_change = now(),
    page = '$p',
    content = '$c'
WHERE
    page = '$p';
");

if($blnSuccess){
echo "success";
}
else {
echo "not success!";
}
在你的jquery中

.done(function(data){
            $('#response').html(data); 
}

数据包含successnot success!作为ajax响应返回。

<强>更新
如果要从数据库返回一些数据,那么:

$result = mysql_query("
   select * 
      from `poznamky`
");

while ($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
    echo $row['content'];
}

然后它会将content表中的所有poznamky字段返回到ajax中的数据。

答案 1 :(得分:1)

<?php
$s = $_POST['s'];
$p = $_POST['p'];
$c = $_POST['c'];

// connecting DB

$OK = mysql_query("
UPDATE `poznamky`
SET
    last_change = now(),
    page = '$p',
    content = '$c'
WHERE
    page = '$p';
");

$id = mysql_insert_id();
$res = mysql_query("select * from poznamky where id = $id");


$data = mysql_fetch_array($res);

//Print raw or JSON of $data like json_encode($data) etc

答案 2 :(得分:0)

如果你想在note.php中返回一些东西,你可以这样做:

$s = $_POST['s'];
$p = $_POST['p'];
$c = $_POST['c'];

// connecting DB

mysql_query("
UPDATE `poznamky`
SET
    last_change = now(),
    page = '$p',
    content = '$c'
WHERE
    page = '$p';
");

$select = "//use your select query and loop here and get all data in this variable";

exit($select);

并在jquery中:

.done(function(data){
           //data has the response. You can do whatever you want to do with it.
}
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