如何在php中使用名称变量？ [关闭]

你好，我正在研究使用传递到其他 php 文件的值。然而，每次我尝试将 name 变量的值与下面的普通变量结合使用时，PHP 都不会读取它！

global $counterforlist;
 $counterforlist= 0;
while ($row = mysql_fetch_array($result)){
$counterforlist = $counterforlist +1;
echo "<td><input type= 'text' name = 'jobrequestnumber$counterforlist' value =".$row['jobrequestnumber']."></td>"   ; 
echo "<td><input type= 'text' name = 'requestingcompany$counterforlist' value =".$row['requestingcompany']."></td>" ;
echo "<td><input type= 'text' name = 'dateforService$counterforlist' value =".$row['dateforService']."></td>"   ;
echo "<td><a href=\"update_request.php?jobrequestnumber{$counterforlist}={$row['jobrequestnumber']}&requestingcompany{$counterforlist}={$row['requestingcompany']}&dateforService{$counterforlist}={$row['dateforService']}&{$counterforlist}={$counterforlist}\">Update</a></td>";
echo "<td><a href='delete.php?jobrequestnumber=".$row['jobrequestnumber']."'>Delete</a></td>"; //too
echo "</tr>";
<?php include('update_request.php');?> 

这是调用这些值的另一个 php 文件 在更新请求中....

<?php 
global $counterforlist;

$jobrequestnumber=$_GET["jobrequestnumber"."$counterforlist"];
$requestingcompany=$_GET["requestingcompany"."$counterforlist"];
$dateforService=$_GET["dateforService"."$counterforlist"]; 

$required_array=array($jobrequestnumber,$requestingcompany,$dateforService);
$errors = array();
$errors = array_merge($errors, check_required_fields($required_array, $_POST));
if (empty($errors)){
// Database submission only proceeds if there were NO errors.
    $query =    "UPDATE jobrequest SET 
                        requestingcompany = '{$requestingcompany}',
                        dateforService = {$dateforService} 
                    WHERE jobrequestnumber ={$jobrequestnumber}";
                    echo $jobrequestnumber;
        $result = mysql_query($query);

错误信息

Notice: Undefined index: jobrequestnumber in C:\xampp\htdocs\xampp\capstone\update_request.php on line 7

Notice: Undefined index: requestingcompany in C:\xampp\htdocs\xampp\capstone\update_request.php on line 8

Notice: Undefined index: dateforService in C:\xampp\htdocs\xampp\capstone\update_request.php on line 9

如果我再次声明变量，它不会从上一个 php 页面读取值。 你能帮我弄清楚我错过了什么吗:)

看来你没有声明柜台

你为什么不做一个

echo "<td><input type= 'text' name = 'jobrequestnumber[]' value =".$row['jobrequestnumber']."></td>"   ; // results in the same jobrequestnumbers
echo "<td><input type= 'text' name = 'requestingcompany[]' value =".$row['requestingcompany']."></td>" ;//this too
echo "<td><input type= 'text' name = 'dateforService[]' value =".$row['dateforService']."></td>"   ;

然后在你的PHP中 $Size = count($_GET["jobrequestnumber"]);

for($X=0; $Size<$X; $X++){
   $jobrequestnumber=$_GET["jobrequestnumber"][$X];
   $requestingcompany=$_GET["requestingcompany"][$X];
   $dateforService=$_GET["dateforService"][$X];

   // here update database
}

现在您不需要计数器变量。

或者你可以做

foreach ($_GET["jobrequestnumber"] as $key => $value){
   $jobrequestnumber=$value;
   $requestingcompany=$_GET["requestingcompany"][$key];
   $dateforService=$_GET["dateforService"][$key];

   // here update database
}