Question

我有一个包含一些数据的文本文件，我将其传递给表格中的一些输入

<!doctype html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<form action="edit_subjects.php" method="post">
    <?php
    $content = file('../db/test.txt');
    foreach($content as $eachLine) {
        list($subject, $type, $description) = explode('|', $eachLine);
        echo '<label for="subject">Subject:</label>';
        echo '<input type="text" name="subject" id="subject" value="'.$subject.'"><br>';
        echo '<label for="type">Type:</label>';
        echo '<input type="text" name="type" id="type" value="'.$type.'"><br>';
        echo '<label for="description">Description:</label><br>';
        echo '<textarea name="description" id="description">'.$description.'</textarea><br>';
    }
    ?>
    <input type="submit">
</form>
</body>
</html>

运行代码会输出：

<label for="subject">Subject:</label>
<input type="text" name="subject" id="subject" value="Subject 1"><br>
<label for="type">Type:</label>
<input type="text" name="type" id="type" value="Type1"><br>
<label for="description">Description:</label><br>
<textarea name="description" id="description">Description1
</textarea><br>

<label for="subject">Subject:</label>
<input type="text" name="subject" id="subject" value="Subject 2"><br>
<label for="type">Type:</label>
<input type="text" name="type" id="type" value="Type2"><br>
<label for="description">Description:</label><br>
<textarea name="description" id="description">Description2
</textarea><br>

<label for="subject">Subject:</label>
<input type="text" name="subject" id="subject" value="Subject 3"><br>
<label for="type">Type:</label>
<input type="text" name="type" id="type" value="Type3"><br>
<label for="description">Description:</label><br>
<textarea name="description" id="description">Description3
</textarea><br>

正如您所看到的那样，名称会一遍又一遍地重复出现，那么我将如何单独访问每组输入并将其写入文件

Answer 1

在文件edit_subjects.php中，您必须使用$ _POST ['subject']读取传递的参数，然后以正确格式（$ result）的字符串连接变量并将其写回以下代码：

$fp = fopen("../db/test.txt", "r+");
if (flock($fp, LOCK_EX)) {
    ftruncate($fp, 0);      
    fwrite($fp, $result);
    fflush($fp);           
    flock($fp, LOCK_UN);    
} else {
    echo "Couldn't get the lock!";
}
fclose($fp);

Answer 2

以下是edit_subjects.php的一个解决方案：

如果要在这样的循环中打印表单项，然后在提交表单时发送它们，则需要更改每个循环上的name=值。你可以像这样使用和增量数字：

$i = 1;

foreach($content as $eachLine) {
        list($subject, $type, $description) = explode('|', $eachLine);
        echo '<label for="subject">Subject:</label>';
        echo '<input type="text" name="subject' . $i .'" id="subject" value="'.$subject.'">br>';
        echo '<label for="type">Type:</label>';
        echo '<input type="text" name="type' . $i .'" id="type" value="'.$type.'"><br>';
        echo '<label for="description">Description:</label><br>';
        echo '<textarea name="description' . $i .'" id="description">'.$description.'</textarea><br>';
        $i++
    }

或您可以将表单name转换为数组：

echo '<input type="text" name="subject[]" id="subject" value="'.$subject.'">

这将要求您在edit_subjects.php中循环它们以获取值。

然后，从$ _POST数组中访问您的表单值（请记住，您应该转义所有值）：

    if (isset($_POST['subject'])
    {
        $subject = $_POST['subject'];
        $type = $_POST['type'];
        //your other form values here...
        $result = $subject . "," . $type //or however you want to structure it
        $file = fopen("../db/test.txt", "w");
        fwrite($file, $result);
    } else {
        echo "POST variables not set!";
        die;
    }

如果使用数组，则访问POST值的示例是：

if (isset($_POST['subject'])
    {
        $file = fopen("../db/test.txt", "w");
        $i = 0;

        foreach($_POST['subject'] as $array)
        {
           $result = $_POST['subject'][$i] . "," . $_POST['type'][$i] ."\r\n";
           fwrite($file, $result);
           $i++
        }


    } else {
        echo "POST variables not set!";
        die;
    }

提交对从文本文件加载的输入数据所做的更改

2 个答案: