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><head><script src="clienthint.js"></script> </head><body><form> First Name:<?php echo "<a>"; echo "<i class=\"dapei_partleft\"></i>"; echo "<span class=\"dapei_partmiddle\" title='teswt' name='test' onclick=\"showHint(1)\">test</span>"; echo "<i class=\"dapei_partright\"></i>"; echo " </a>"; echo "<a>"; echo "<i class=\"dapei_partleft\"></i>"; echo "<span class=\"dapei_partmiddle\" title='teswt1' name='test1' onclick=\"showHint(2)\">test</span>"; echo "<i class=\"dapei_partright\"></i>"; echo " </a>";?></form><p>Suggestions: <span id="txtHint"></span></p></body></html>
js clienthint代码
var xmlHttpfunction showHint(str){if (str.length==0) { document.getElementById("txtHint").innerHTML="" return }xmlHttp=GetXmlHttpObject()if (xmlHttp==null) { alert ("Browser does not support HTTP Request") return } var url="gethint.php"url=url+"?q="+strurl=url+"&sid="+Math.random()xmlHttp.onreadystatechange=stateChanged xmlHttp.open("GET",url,true)xmlHttp.send(null)} function stateChanged() { if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { document.getElementById("txtHint").innerHTML=xmlHttp.responseText } }function GetXmlHttpObject(){var xmlHttp=null;try { // Firefox, Opera 8.0+, Safari xmlHttp=new XMLHttpRequest(); }catch (e) { // Internet Explorer try { xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } }return xmlHttp;} 处理页面代码gethint.php
<?php $q=$_GET["q"];//$select ="select * from test where cid='$q'";$hint="for($i=0;$i<2;$i++){......}";//Set output to "no suggestion" if no hint were found//or to the correct valuesif ($hint == ""){$response="no suggestion";}else{$response=$hint;}//output the responseecho $response;?> 因为在处理页面$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！
回复讨论(解决方案)
通过 eval 和 create_function 都可实现
通过 eval 和 create_function 都可实现 谢谢。能举个例吗？因为我刚用了eval试了下。不行呢，操作如下
$hint='for($i=0;$i
eval("\$hint = \"$hint\";");
$hint='for($i=0;$i<2;$i++){}';eval($hint);echo $i; //2
$hint = 'for($i=0;$i<2;$i++){}';if(2 == eval($hint.' return $i;')) echo 'ok';
$hint = 'for($i=0;$i<2;$i++){}';if(2 == eval($hint.' return $i;')) echo 'ok'; 额。还是有点不明白,不好意思，麻烦看下如下代码：
$hint = 'for($i=0;$i123}';
if(2 == eval($hint.' return $i;'))
echo 'ok';
我希望显示两个层
如果程序写作
for($i=0;$i123}
您认为是正确的吗？
如果程序写作
for($i=0;$i123}
您认为是正确的吗？ 额。因为是希望可以循环传递多个层出去，额额。自己想想也不应该是这么写。抱歉
$hint = 'for($i=0;$i<2;$i++){}';if(2 == eval($hint.' return $i;')) echo 'ok'; 额。能指导下吗？
$hint = 'for($i=0;$i<2;$i++){}';if(2 == eval($hint.' return $i;')) echo 'ok'; 已经解决了层循环的问题，但是原本层上有的JS动作，通过eval出来就没有效果了。这是什么原因呀！
可能是：
标记不配套
id 重名
预先绑定的事件无效
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