Php 使用AJAX/MySQL多变量实现实时性？

我有一个dymamic PHP文件，从MySQL数据库加载关于某个中继卡的数据，每个用户都有不同数量的中继卡。所有卡都有8个继电器（状态1/0）、8个输入（状态1/0）和2个模拟输入（状态从0到1024）。这是对于每个卡，一些用户将有1个继电器，而另一些用户可以有8个继电器，我希望尽快更新此数据。我已经完成了一个PHP脚本，该脚本触发特定用户的所有中继信息，在本例中，这是用户2

我认为按照我所读到的那样做我想做的事情的最好方法是从jQuery调用它，但我不理解如何更新许多变量

下面是我必须从MySQL获取最新状态的代码。 好的，这里是代码的更新，我已经完全分离了数据获取和GUI创建，所以我想做的是，实时显示get_states_GUI.php文件从mysql获取到GUI.php文件的内容。既然我现在完全迷路了，有人能给我指个好方向吗！THanx这里有两个文件： gui.php：

<?php
require_once('config.php');
$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$start = $time;
// We create connection to the MySQL database.
$con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
    if(!$con) {
        die('Failed to connect to server: ' . mysql_error());
    }
//Select database
$db = mysql_select_db(DB_DATABASE);
    if(!$db) {
        die("Unable to select database\n");
    }
$req="SELECT * FROM cartes WHERE utilisateur=$user";
$result = mysql_query($req);
    if(!$result) {
        die('Query failed: ' . mysql_error());
    }    
$nb_iplab = mysql_num_rows($result);
$b = "1";
while ($ligne = mysql_fetch_assoc($result))
{
    extract($ligne);
    ${'nom'.$b} = $nom;
    ${'mac'.$b} = $mac;
    ${'ip'.$b} = $ip; 
    for ($i=1; $i <= "8"; $i++ )
    {
        //We set Relays names for each IPLAB and get their states in the MySQL database.
        ${'nomR'.$i.$b} = ${'nomR'.$i};
        $req = "SELECT * FROM states_log WHERE dev='R$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
        $result2 = mysql_query($req);
            if(!$result2) 
            {
                die('Query failed: ' . mysql_error());
            }   
        $ligne = mysql_fetch_assoc($result2);
        extract($ligne); 
        ${'stateR'.$i.$b} = $state;
        if ( ${'stateR'.$i.$b} == "1" )
        {
            ${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=CR$i target=empty> <img src=img/toggle_1.png height=28></a>";
        }
        else if ( ${'stateR'.$i.$b} == "0" )
        {
            ${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=SR$i target=empty> <img src=img/toggle_0.png height=28></a>";
        }
        else
        {
            ${'img_linkR'.$i.$b} = "<a href=set_states.php?ip=${'ip'.$b}&cmd=CR$i target=empty> <img src=img/LED_yellow.png height=28></a>";
        }               
        //We set Inputs names for each IPLAB and get their states in the MySQL database.
        ${'nomI'.$i.$b} = ${'nomI'.$i};
        ${'multI'.$i.$b} = ${'multI'.$i};
        ${'img_onI'.$i.$b} = ${'img_onI'.$i};
        ${'img_offI'.$i.$b} = ${'img_offI'.$i};
        ${'img_naI'.$i.$b} = ${'img_naI'.$i};
        $req = "SELECT * FROM states_log WHERE dev='I$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
        $result2 = mysql_query($req);
            if(!$result2) 
            {
                die('Query failed: ' . mysql_error());
            }   
        $ligne = mysql_fetch_assoc($result2);
        extract($ligne);
        ${'stateI'.$i.$b} = $state;
        if ( ${'stateI'.$i.$b} == "1" )
        {
            ${'img_linkI'.$i.$b} = "<img src=img/${'img_onI'.$i.$b} height=28>";
        }
        else if ( ${'stateI'.$i.$b} == "0" )
        {
            ${'img_linkI'.$i.$b} = "<img src=img/${'img_offI'.$i.$b} height=28>";
        }
        else
        {
            ${'img_linkI'.$i.$b} = "<img src=img/${'img_naI'.$i.$b} height=28>";
        }
        // We check for how many times, the Inputs has changed state to 1, and we set them as a variable for counter.
        $req = "SELECT count(*) FROM states_log WHERE dev='I$i' AND state='1' AND mac='${'mac'.$b}'";
        $result2 = mysql_query($req);
            if(!$result2) 
            {
                die('Query failed: ' . mysql_error());
            }   
        list (${'countI'.$i.$b}) = mysql_fetch_row ($result2);
        if (isset(${'multI'.$i.$b}))
        {
            ${'countI'.$i.$b} = ${'countI'.$i.$b} * ${'multI'.$i.$b};
        }

    } 
    //We set Analog names fir each IPLAB and get their states in the MySQL database.
    for ($i=1; $i <= "3"; $i++ )
    {
        ${'nomA'.$i.$b} = ${'nomA'.$i};
        ${'unitA'.$i.$b} = ${'unitA'.$i};
        $req = "SELECT * FROM states_log WHERE dev='A$i' AND mac='${'mac'.$b}' ORDER BY date_heure DESC LIMIT 1";
        $result2 = mysql_query($req);
            if(!$result2) 
            {
                die('Query failed: ' . mysql_error());
            }   
        $ligne = mysql_fetch_assoc($result2);
        extract($ligne);
        ${'stateA'.$i.$b} = $state;
    } 
    if ( debug == "1" )
    {
        echo "${'nom'.$b}<br>";
        echo "MAC = ${'mac'.$b}<br>";
    for ( $i = 1; $i <= 8; $i++ )
        {

            echo "${'nomR'.$i.$b} = ${'stateR'.$i.$b}<br>";
            echo "${'nomI'.$i.$b} = ${'stateI'.$i.$b}<br>";
        }
    for ( $i = 1; $i <= 3; $i++ )
    {
        echo "${'nomA'.$i.$b} = ${'stateA'.$i.$b}<br>";
    }
        echo "---------------------------------------<br>";
    }
    $b++;
    }

$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$finish = $time;
$total_time = round(($finish - $start), 4);
if ( debug == "1" )
    {
        echo 'Page generated in '.$total_time.' seconds.'."\n";
    }
mysql_close($con);
?>

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你可以写更多的抽象问题。。。不需要php代码…

如果我没弄错的话，您需要在特定的时间间隔发送ajax请求以获取更新的数据（js函数setInterval（））

这里有一个关于setInterval的链接：

下面是关于ajax的链接：

如果此答案与您的问题无关，请检查并说明您希望如何处理数据？在每次更新时显示它？或者是什么样的更新？
@MARX B W3C学校说得对，组织得很好……这就是为什么我把它联系起来。。。我从没有发现任何错误的信息。。。也许有些过时的。。。但它们仍然有效是的，事实上我对AJAX真的很陌生，但从示例中学习的速度相当快！我想做的是以1秒的间隔执行上面的php phile并更新html页面中的所有信息。你愿意在这方面帮助我吗？老实说，我不是一个大JAVA程序员，我通过示例学习得很快。如果您愿意，我可以让webdav访问源coe。？
You could use javascript to trriger ajax script after 1 sec delay use setTimeout() in javascript for delay And in your php page retrieve the data and echo it.

You could use javascript to trriger ajax script after 1 sec delay use setTimeout() in javascript for delay And in your php page retrieve the data and echo it.