关于变量与循环语句的有关问题 -PHP Tutorial-php.cn

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关于变量与循环语句的有关问题

Jun 13, 2016 pm 12:34 PM

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关于变量与循环语句的问题
各位大牛，消息想问个关于AJAX与PHP的问题，现在碰到这样的一个情况
我希望前端页面在点击某标签的时候，在下方可以显示我关于上方点击的标签进行关联的资料，代码如下
index.php

<html><br />
<head><br />
<script src="clienthint.js"></script> <br />
</head><br />
<br />
<body><br />
<br />
<form> <br />
First Name:<br />
<br />
<br />
<?php<br />
<br />
            	echo "<a>";<br />
                	echo "<i class=\"dapei_partleft\"></i>";<br />
                    echo "<span class=\"dapei_partmiddle\" title='teswt' name='test'  onclick=\"showHint(1)\">test</span>";<br />
                    echo "<i class=\"dapei_partright\"></i>";<br />
               echo " </a>";<br />
            	echo "<a>";<br />
                	echo "<i class=\"dapei_partleft\"></i>";<br />
                    echo "<span class=\"dapei_partmiddle\" title='teswt1' name='test1'  onclick=\"showHint(2)\">test</span>";<br />
                    echo "<i class=\"dapei_partright\"></i>";<br />
               echo " </a>";<br />
?><br />
</form><br />
<br />
<p>Suggestions: <span id="txtHint"></span></p><br />
<br />
</body><br />
</html>

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js clienthint代码

var xmlHttp<br />
<br />
function showHint(str)<br />
{<br />
if (str.length==0)<br />
  { <br />
  document.getElementById("txtHint").innerHTML=""<br />
  return<br />
  }<br />
xmlHttp=GetXmlHttpObject()<br />
if (xmlHttp==null)<br />
  {<br />
  alert ("Browser does not support HTTP Request")<br />
  return<br />
  } <br />
var url="gethint.php"<br />
url=url+"?q="+str<br />
url=url+"&sid="+Math.random()<br />
xmlHttp.onreadystatechange=stateChanged <br />
xmlHttp.open("GET",url,true)<br />
xmlHttp.send(null)<br />
} <br />
<br />
function stateChanged() <br />
{ <br />
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")<br />
 { <br />
 document.getElementById("txtHint").innerHTML=xmlHttp.responseText <br />
<br />
 } <br />
}<br />
<br />
function GetXmlHttpObject()<br />
{<br />
var xmlHttp=null;<br />
try<br />
 {<br />
 // Firefox, Opera 8.0+, Safari<br />
 xmlHttp=new XMLHttpRequest();<br />
 }<br />
catch (e)<br />
 {<br />
 // Internet Explorer<br />
 try<br />
  {<br />
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");<br />
  }<br />
 catch (e)<br />
  {<br />
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");<br />
  }<br />
 }<br />
return xmlHttp;<br />
}

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处理页面代码gethint.php

<?php<br />
 $q=$_GET["q"];<br />
<br />
//$select ="select * from test where cid='$q'";<br />
<br />
$hint="for($i=0;$i<2;$i++){......}";<br />
<br />
//Set output to "no suggestion" if no hint were found<br />
//or to the correct values<br />
if ($hint == "")<br />
{<br />
$response="no suggestion";<br />
}<br />
else<br />
{<br />
$response=$hint;<br />
}<br />
<br />
//output the response<br />
echo $response;<br />
?>

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因为在处理页面$hint 是需要传到前端页面的，所以我希望在处理页面将循环内容都做好之后传递，但是我这样写：$hint="for($i=0;$i 所以拜托大家有没有什么好的办法解决一下
在线等，谢谢各位了！

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