Question

我尝试在以下代码中向表中添加计数器。但我无法成功。我可以帮忙吗？谢谢。像这样：

$counter = 0;
$counter++;
if($counter % 33 == 0)

因此，当添加计数器时，表格将在页面右侧的％33之后继续，并且它将继续这样，而不是沿着页面下移。

<!DOCTYPE html>
<html>

<head>
    <title></title>
<link rel="stylesheet" type="text/css" href="etc/sumain.css" />
    </head>

    <body>

<table class="tbresult">

<?php 

include ("confige.php");

$query = 'select * from employees'; 
$result = mysqli_query($link, $query); 
if (!$result) { 
    $message = 'ERROR:' . mysqli_error($link); 
    return $message; 
} else { 
    $i = 0; 
    echo '<form name="select" action="" method="GET">';
     echo '<select name="mySelect" id="mySelect"  onchange="this.form.submit()">'; 
    while ($i < mysqli_field_count($link)) { 
        $meta =  
        mysqli_fetch_field_direct($result, $i); 
        echo '<option>' . $meta->name . '</option>'; 
        $i = $i + 1; 
    } 
echo '</select>';
echo '</form>';
} 

if(isset($_GET['mySelect'])) {
$myselect = $_GET['mySelect']; 

$sql = "SELECT `$myselect` as mySelect FROM employees";  // add column alias
$result = mysqli_query($link, $sql);   

  if ($result->num_rows > 0) {

   // output data of each row
   while($row = $result->fetch_assoc()) 
   {
        echo "<tr><td>" . $row["mySelect"] . "</td></tr>";

   }

      echo "</table>";


}

} 


mysqli_close($link);

?>

</body>

</html>

Answer 1

首先，在表格中没有HTML表单，这是无效的，AFIK，并且可能会在不同的浏览器中引起很多麻烦。

您只需打开一次表，然后创建一个counter = 0，并在每个while循环上添加1。然后检查，如果它除以33而不是关闭表并打开一个新表。循环结束后，关闭最后一个表。

可以使用CSS完成并排对齐，例如.tbresult {float: left; width: 200px;}

这样的事情：

<!DOCTYPE html>
<html>

<head>
    <title></title>
    <link rel="stylesheet" type="text/css" href="etc/sumain.css" />
</head>

<body>

<?php 

include ("confige.php");

$query = 'select * from employees'; 
$result = mysqli_query($link, $query); 
if (!$result) { 
    $message = 'ERROR:' . mysqli_error($link); 
    return $message; 
} else { 
    $i = 0; 
    echo '<form name="select" action="" method="GET">';
    echo '<select name="mySelect" id="mySelect"  onchange="this.form.submit()">'; 
    while ($i < mysqli_field_count($link)) { 
        $meta =  
            mysqli_fetch_field_direct($result, $i); 
        echo '<option>' . $meta->name . '</option>'; 
        $i = $i + 1; 
    } 
    echo '</select>';
    echo '</form>';
}

if(isset($_GET['mySelect'])) {
    $myselect = $_GET['mySelect']; 

    $sql = "SELECT `$myselect` as mySelect FROM employees";  // add column alias
    $result = mysqli_query($link, $sql);   

    if ($result->num_rows > 0) {

        // output data of each row
        $table_row_counter = 0;
        echo '<table class="tbresult">';

        while($row = $result->fetch_assoc()) 
        {
            $table_row_counter++;
            if ($table_row_counter % 33 == 0) {
                echo '</table>';
                echo '<table class="tbresult">';
            }
            echo "<tr><td>" . $row["mySelect"] . "</td></tr>";

        }
    }
} 


mysqli_close($link);

?>

</body>

</html>

向表中添加计数器

1 个答案: