<html>
<script type="text/javascript">
function show_alert()
{
alert("I am an alert box!");
}
</script>
<body>
<?php
$x = 8;
if($x ==10){
echo "Hi";
}
else{
echo 'show_alert()';
}
?>
</body>
</html>
如何得到回显以输出show_alert()的值?JS函数的PHP输出值
阅读:http://stackoverflow.com/questions/7016701/creating-jquery-ajax-requests-to-a-php-function/7016795#7016795 – NullUserException