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HomeBackend DevelopmentPHP Tutorial网页开发的阶段总结(四)JS与PHP之间大数据的传送

        在前面 的网页开发的阶段总结(三)中,我们知道JS与PHP之间直接互相调用,往往有很多不便,而且一次只能传送一个数据结果进行返回。而通过ajax方法可以实现JS一次性读取php的所传送过来的大量数据。通过提交表单的方式,让php可以一次性读取JS的大量数据。

1、借用AJAX方法,通过php读取数据库将大量数据显示在网页客户端上。

     a、页面一加载完,执行函数Gett(),代码如下:

<meta http-equiv="Content-Type" content="text/html; charset=" gb2312><title></title><script language="JavaScript" src="javascript.js"></script><script language="JavaScript">function Gett(){		  		if (window.XMLHttpRequest)		  {		  // code for IE7+, Firefox, Chrome, Opera, Safari		   xmlHttp=new XMLHttpRequest();		   var url="responsexml.php";			   xmlHttp.open("GET",url,false);		   xmlHttp.send(null);		  xmlHttp.onreadystatechange=getValue(xmlHttp);		   					  }	else		  {		  // code for IE6, IE5		     xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");		     var url="responsexml.php";		  			 xmlHttp.onreadystatechange=function()			  {				if (xmlHttp.readyState==4  && xmlHttp.status==200)					{					    xmlDoc=xmlHttp.responseXML; 						nodes=xmlDoc.documentElement.childNodes;						InputVoltage.innerHTML = nodes.item(3).text;						OutputVoltage.innerHTML = nodes.item(7).text;						OutputMinVoltage.innerHTML = nodes.item(34).text;						 OutputMaxVoltage.innerHTML = nodes.item(33).text;						Frequency.innerHTML = nodes.item(13).text;								xmlHttp = null;					}						  }			  			 xmlHttp.open("GET",url,true);			 xmlHttp.send(null);		 		  }		  } </script><p> </p><div align="center">
<br>  <table width="75%" border="0" cellspacing="0">    <tr>      <td width="25%" nowrap>
<br>        <table width="75%" border="0" align="center" cellspacing="0">          <tr>            <td width="50%" nowrap>InputVoltage</td>            <td width="50%" height="22" nowrap>               <span id="InputVoltage"></span> V            </td>          </tr>          <tr>            <td nowrap>Frequency</td>            <td nowrap>              <span id="Frequency"></span> Hz            </td>          </tr>        </table>
</td>      <td width="50%" nowrap>		<div align="center">	</div>
</td>      <td width="25%" nowrap>	  	<table width="98%" height="100" border="0" cellspacing="0">          <tr>            <td width="50%" nowrap>OutputVoltage</td>            <td width="50%" height="22" nowrap>              <span id="OutputVoltage"></span> V            </td>          </tr>          <tr>            <td nowrap>OutputMaxVoltage</td>            <td height="22" nowrap>              <span id="OutputMaxVoltage"></span> V            </td>          </tr>          <tr>            <td nowrap>OutputMinVoltage</td>            <td height="22" nowrap>              <span id="OutputMinVoltage"></span> V            </td>          </tr>		    <br> b、在服务端,将数据库的内容转为一维数组,并用xml格式保存起来。   <p></p>  <p>     </p>  <pre name="code" class="sycode"><?php $dbh = new PDO("sqlite:upsdata.dat", null, null);  	    $sth = $dbh->query('SELECT * FROM t_ups_rundata');		 $result = $sth->fetchAll();	 $i=0;	 $CountArray=0;	 foreach($result[0] as $x=>$x_value)	 		{							   if($i%2==0)			    {														$UPSData[$CountArray++]=$x_value;				}					$i++;			}header('Content-Type: text/xml');echo "<?xml version='1.0' encoding='utf-8'?>";echo "<upsdataxml>";    echo	"<protocol_id>$UPSData[0]</protocol_id>";echo    "<curr_time>$UPSData[1]</curr_time>";echo 	"<input_phase>$UPSData[2]</input_phase>";echo    "<inputvol_a>$UPSData[3]</inputvol_a>";	 echo    "<inputvol_b>$UPSData[4]</inputvol_b>";	 echo    "<inputvol_c>$UPSData[5]</inputvol_c>";	 echo 	"<output_phase>$UPSData[6]</output_phase>";echo    "<outputvol_a>$UPSData[7]</outputvol_a>";  echo    "<outputvol_b>$UPSData[8]</outputvol_b>";  echo    "<outputvol_c>$UPSData[9]</outputvol_c>";  echo 	"<output_load>$UPSData[10]</output_load>";echo 	"<batt_total_vol>$UPSData[11]</batt_total_vol>";echo	"<batt_cap>$UPSData[12]</batt_cap>";echo	"<input_fre>$UPSData[13]</input_fre>";echo	"<ups_model>$UPSData[14]</ups_model>";echo	"<ups_manufactory>$UPSData[15]</ups_manufactory>";echo	"<ups_ver>$UPSData[16]</ups_ver>";echo	"<rate_vol>$UPSData[17]</rate_vol>";echo	"<rate_power>$UPSData[18]</rate_power>";echo	"<rate_fre>$UPSData[19]</rate_fre>";echo	"<rate_battvol>$UPSData[20]</rate_battvol>";echo	"<is_acfail>$UPSData[21]</is_acfail>";echo	"<is_bypass>$UPSData[22]</is_bypass>";echo	"<is_battlow>$UPSData[23]</is_battlow>";echo	"<is_upsfail>$UPSData[24]</is_upsfail>";echo	"<is_shutdown>$UPSData[25]</is_shutdown>";echo	"<is_testting>$UPSData[26]</is_testting>";echo	"<is_ups_offline>$UPSData[27]</is_ups_offline>";echo	"<e_temperature>$UPSData[28]</e_temperature>";echo 	"<e_humidity>$UPSData[29]</e_humidity>";echo	"<input_default_vol>$UPSData[30]</input_default_vol>";echo	"<batt_mon_vol>$UPSData[31]</batt_mon_vol>";echo	"<ups_temp>$UPSData[32]</ups_temp>";echo	"<output_max_vol>$UPSData[33]</output_max_vol>";echo	"<output_min_vol>$UPSData[34]</output_min_vol>";echo	"<batt_temp>$UPSData[35]</batt_temp>";echo	"<is_horn>$UPSData[36]</is_horn>";echo	"<is_ups_type>$UPSData[37]</is_ups_type>";echo	"<is_guard>$UPSData[38]</is_guard>";echo "</upsdataxml>"; $dbh = null;?>

完整代码下载:http://download.csdn.net/detail/aba13579/7877307






2、通过提交表单的方式,在php服务器端的用$_GET()或$_POST()方式获取大量的数据写入数据库。

     a、通过  的type="submit"类型将数据上传到PHP服务端上。  

       

 <meta http-equiv="Content-Type" content="text/html; charset=" gb2312><script language="JavaScript"></script>  
UpsCommBaud
OfflineQueryTime  
OfflineQueryNum

 


 b、PHP服务器端通过$_POST()获取数据写入数据库

    

<?php $temp = array(); $temp[0] = $_POST["UpsCommBaud"]; $temp[1] = $_POST["OfflineQueryTime"]; $temp[2] = $_POST["OfflineQueryNum"];  try{ 	$IPGuard ="sqlite:ipguard.dat";	$dbh = new PDO($IPGuard, null, null); 	$dbh->exec("UPDATE t_ups_protocol set baudrate='$temp[0]'");	$dbh->exec("UPDATE t_env_param set interval='$temp[1]',offLine_Count='$temp[2]'");	$dbh->beginTransaction();	$dbh = null;	}	catch (PDOException $e){   echo 'Connection failed: ' . $e->getMessage();   $dbh = null;} ?>




完整代码下载:http://download.csdn.net/detail/aba13579/7877311


3、借用AJAX方式,一次性传递一个数据到php服务器上并一次性将一个数据返回给web客户端。

      以下网址有详细介绍:http://www.w3school.com.cn/ajax/ajax_asp_php.asp,故不再详述。

   

     

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