Question

 <?php
  //if pageNum isset figure out where to start(7 rows per page * page num +1
   $pageNum = isset($_GET['pageNum']) ? (int)$_GET['pageNum'] : 0;
   $startRow = $pageNum == 0 ? 0 : ($pageNum * 7 + 1);
    $endRow = $startRow + 7;
       $count = 0;
 while (($data = fgetcsv($handle, 1000, ";")) !== FALSE) {
if($count >= $startRow)
    echo ' aantal vervangingen: 30';

$row = 1;
  if (($handle = fopen("vervangingen.csv", "r")) !== FALSE) {

echo '<table border="1">';



while (($data = fgetcsv($handle, 1000, ";")) !== FALSE) {
    $num = count($data);
    if ($row == 1) {
        echo '<tr>';
    }else{
        echo '<tr>';
    }

    for ($c=0; $c < $num; $c++) {
        //echo $data[$c] . "<br />\n";
        if(empty($data[$c])) {
           $value = "&nbsp;";
        }else{
           $value = $data[$c];
        }
        if ($row == 1) {
            echo '<th>'.$value.'</th>';
        }else{
            echo '<td>'.$value.'</td>';
        }
    }

    if ($row == 1) {
        echo '</tr></thead><tbody>';
    }else{
        echo '</tr>';
    }
    $row++;
}

echo '</tbody></table>';
fclose($handle);

 }
        if($count == $endRow)
{
    //wait 3 seconds then use javascript to redirect.
    sleep(3);
    echo '<script>window.loaction.href="theurl?pageNum='.($pageNum +1).'"</script>';
}

 }

 ?>

我在php中创建了一个表，它从.csv文件中获取数据。我的问题是，我如何让php显示前7行，然后它应该刷新页面并显示以下7行，总共有30行。一旦显示了所有行，它仍应刷新页面并重新开始。

我该怎么做？我知道如何刷新php页面，但每次刷新显示7行是相当困难的。有什么帮助吗？

问候

Answer 1

您可以使用Javascript的setTimeout和一个get变量来完成此任务。

//if pageNum isset figure out where to start(7 rows per page * page num +1
$pageNum = isset($_GET['pageNum']) ? (int)$_GET['pageNum'] : 0;
$startRow = $pageNum == 0 ? 0 : ($pageNum * 7 + 1);
$endRow = $startRow + 7;
$count = 0;
while (($data = fgetcsv($handle, 1000, ";")) !== FALSE) {
    if($count >= $startRow)
    {
        $num = count($data);
        if ($row == 1) {
            echo '<tr>';
        }else{
            echo '<tr>';
        }

        for ($c=0; $c < $num; $c++) {
            //echo $data[$c] . "<br />\n";
            if(empty($data[$c])) {
               $value = "&nbsp;";
            }else{
               $value = $data[$c];
            }
            if ($row == 1) {
                echo '<th>'.$value.'</th>';
            }else{
                echo '<td>'.$value.'</td>';
            }
        }

        if ($row == 1) {
            echo '</tr></thead><tbody>';
        }else{
            echo '</tr>';
        }
        $row++;
    }
    if($count == $endRow)
    {
        //make it dynamic...
        $theUrl = $_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']."?pageNum=".($pageNum+1);
        //wait 3 seconds then use javascript to redirect.
        echo '<script>setTimeout(function(){
                 window.location.href="'.$theUrl.'"}, 3000)
              </script>';
    }
    ++$count;

}

第一步是找出你所在的页面，然后显示你想要的内容，然后使用javascript重定向，因为在发送标题后php重定向将失败。 setTimeout函数也控制着等待

Answer 2

以下（已测试）使用PHP会话和JS setTimeout 有趣，但我想知道我是否会使用这种效果。（我无法将$ handle保存为会话变量。）

<?php // z1.php is this file, z1.csv is the data file
session_start();
echo <<<EOD
<body onload="setTimeout('f1();',3000);">
<script type="text/javascript">
function f1() { window.location.replace("z1.php"); } 
</script>
EOD;

if (isset($_SESSION['sessrow1st'])) { $row1st = $_SESSION['sessrow1st']; }
else { $row1st = 1; }
$handle = fopen("z1.csv", "r");
if ($handle === false) { exit("open error"); };
echo "<table border='1'>\n";
$rownum = 0;
while (($data = fgetcsv($handle, 1000, ";")) !== FALSE) {
  $rownum += 1;
  if ($rownum < $row1st) continue;
  if ($rownum > $row1st+6) break; 
  $numcols = count($data);
  echo '<tr>';
  for ($c=0; $c < $numcols; $c++) {
    if(empty($data[$c])) { $value = "&nbsp;"; }
    else { $value = $data[$c]; }
    echo '<td>'.$value.'</td>'; }
  echo "</tr>\n"; }
echo '</table></body>';
if (feof($handle)) { $rownum = 1; }
fclose($handle);
$_SESSION['sessrow1st'] = $rownum;
?>

PHP - 刷新页面并在表格中显示不同的行

2 个答案: