通过Ajax调用PHP函数
[英]Call PHP Function by Ajax
问题描述
I'm new for Web sites.I have a text box in my page and what i need is when onBlur that text box, call a php method that include sql query.I found something like on the web, but still does net work it.Am i doing wrong? 
我是网站的新手。我的页面上有一个文本框，当onBlur该文本框时，我需要的是调用包含sql查询的php方法。我在网上找到了类似内容，但仍然可以正常工作我做错了吗？
<?php
if(isset($_POST['Greet']))
{
echo $_POST['Greet'];
}
?>
<html>
<body>
<script type="text/javascript">
function sayHi()
{
var value = $.ajax({
type: "POST",
url: "page.php",
data: "Greet="+$("#Greeting").val(),
async: false
}).responseText;
}
</script>
<input type="text" name="Greeting" id="Greeting" onblur="sayHi()">
</body>
</html>
2 个解决方案
解决方案1
2 已采纳 2012-08-16 10:30:44
exit your php for usage in same script, ajax will return entire html. 退出您的php以在同一脚本中使用，ajax将返回整个html。
<?php
if(isset($_POST['Greet']))
{
echo $_POST['Greet'];
die;
}
?>
value will have your response alert(value) value将有您的响应alert(value)
later edit: 以后编辑：
<?php
if(isset($_POST['Greet']))
{
echo $_POST['Greet'];
die;
}
?><html>
<body>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>
<script type="text/javascript">
function sayHi()
{
var value = $.ajax({
type: "POST",
url: "index.php",
data: "Greet="+$("#Greeting").val(),
async: false
}).responseText;
$('#result').html(value);
}
</script>
<span id="result"></span>
<input type="text" name="Greeting" id="Greeting" onblur="sayHi()">
</body>
</html>
解决方案2
1 2012-08-16 10:31:00
You should include the jQuery script to your page to make $.ajax work. 您应该在页面中包含jQuery脚本，以使$ .ajax工作。
Like this: 像这样：
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>
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