php 中session问题 isset（）不能判断
login.php
session_start();
include_once 'fuctions.php';
$account=$_REQUEST["account"];
$password=$_REQUEST["password"];
$con = connectDB();
$query="select * from im where account='".$account."' and password='".$password."';";
$result=mysql_query($query);
if($row=mysql_fetch_array($result)){
echo("true");
$_SESSION['$row["id"]']=true;
}
else{
echo("false");
}
mysql_close($con);
?>
contact.php
session_start();
include_once 'fuctions.php';
$con = connectDB();
$query = "select * from im";
$result = mysql_query($query);
$count = 0;
while ($row = mysql_fetch_array($result)) {
$contact[$count] = array("id" => $row["id"], "name" => $row["name"], "group" => $row["group"], "phone" => $row["phone"],"online"=>1);
$count++;
}
for($i=0;$i if(!isset($_SESSION['$contact[$i]["id"]'])){
$contact[$i]["online"]=0;
}
}
foreach ($contact as $key => $array) {
if (is_array($array)){
foreach ($array as $key => $value) {
echo($key."=>".$value." ");
}
}
}
$json=array();
for ($i = 0; $i ["group"],"phone"=>$contact[$i]["phone"]);
}
mysql_close($con);
?>
为什么每次isset($_SESSION['$contact[$i]["id"]'])都判断不出来呢？
------解决方案--------------------
[User:root Time:12:01:13 Path:/home/liangdong/php]$ php dot.php Array( [$b] => 1)[User:root Time:12:01:16 Path:/home/liangdong/php]$ cat dot.php <?php $a['$b'] = 1;print_r($a);?>[User:root Time:12:01:18 Path:/home/liangdong/php]$<br><font color="#e78608">------解决方案--------------------</font><br>把<br>$_SESSION['$row["id"]']=true;和isset($_SESSION['$contact[$i]["id"]'])<br>改成<br>$_SESSION["$row['id']"]=true;和isset($_SESSION["$contact[$i]['id']"])<br><br><br>引号用反了，这种IDE应该会提示的吧<br><br><br><br><font color="#e78608">------解决方案--------------------</font><br>if(!isset($_SESSION[$contact[$i]["id"]])){<br> $contact[$i]["online"]=0;<br>}<br>去掉那对倒霉的单引号<br><font color="#e78608">------解决方案--------------------</font><br>$_SESSION[$row['id']]=true;<br>数组内键值不用加引号<br><div class="clear">
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