使用PHP，我想将来自html页面的用户输入存储在.txt文件中，并将该用户输入输出到同一页面上。
但是，.txt文件或页面div 中均未显示任何内容。
另外：我想让每条新消息显示在新的 DIV 上，我知道这是一个不同的问题，但我认为这可能是相关的。
关于为什么这不起作用的任何想法？
.HTML：
表单本身：
<textarea name="msg" rows="5"></textarea>
<form id="post" name="post" action="storeText.php" method="post">
<input class="button" type="submit" value="POST!"/>
</form>
我想在同一个 html 页面上输出的地方：
<div class="menuItem" >
<?=$msg?>
</div>
.PHP：
存储文本.php
<?php
$filename = 'posts.txt';
$msg = (isset($_POST['msg']) ? $_POST['msg'] : null);
// Let's make sure the file exists and is writable first.
if (is_writable($filename)) {
// In our example we're opening $filename in append mode.
// The file pointer is at the bottom of the file hence
// that's where $somecontent will go when we fwrite() it.
if (!$handle = fopen($filename, 'a')) {
echo "Cannot open file ($filename)";
exit;
}
// Write $somecontent to our opened file.
if (fwrite($handle, $msg) === FALSE) {
echo "Cannot write to file ($filename)";
exit;
}
echo "Success, wrote ($msg) to file ($filename)";
fclose($handle);
} else {
echo "The file $filename is not writable";
}
?>
试一试。
有两个文件，一个用于从同一页面发布的内容，DIV包含display_div.php。
它的设置方式是它将在顶部显示最新帖子。
PHP 处理程序和表单
<?php
// check if the file first exists, if not create the file
if (!file_exists("posts.txt")) {
$fp = fopen('posts.txt', 'a+');
fwrite($fp, '');
chmod("posts.txt", 0644);
// you may have to use this one
// remember to comment out the one with 0644 if using this one
// chmod("posts.txt", 0777);
fclose($fp);
}
// check if "msg" is set
if(isset($_REQUEST['msg'])) {
$file = 'posts.txt';
$str = $_POST['msg'] . "'n";
$temp = file_get_contents($file);
$content = $str.$temp;
file_put_contents($file, $content);
// echo success message
echo "Saved to $file successfully!";
echo "<br>";
echo "Previous messages:";
echo "<hr>";
// print out previous posts
$file = file_get_contents('posts.txt', true);
$lines = explode(PHP_EOL, $file);
foreach ($lines as $line) {
if (strpos($line, '/') === false) {
$line = htmlspecialchars($line . "'n");
echo nl2br($line);
}
}
exit;
} // end of if(isset($_REQUEST['msg']))
?>
<form id="post" name="post" action="" method="post">
<textarea name="msg" rows="5"></textarea>
<br>
<input class="button" type="submit" name="submit" value="POST!" />
</form>
<?php include 'display_div.php'; ?>
display_div.php
注意：你可以去掉Previous messages:<br>或用你的文本替换它。
<div class="menuItem" >
Previous messages:<br>
<?php
$file = file_get_contents('posts.txt', true);
$lines = explode(PHP_EOL, $file);
foreach ($lines as $line) {
if (strpos($line, '/') === false) {
$line = htmlspecialchars($line . "'n");
echo nl2br($line);
}
}
?>
</div>
将 HTML 标记更改为以下内容：
<form id="post" name="post" action="storeText.php" method="post">
<textarea cols="x" rows="x" name="msg"></textarea>
<input class="button" type="submit" value="POST!"/>
</form>
您现在应该能够将数据写入文件，前提是该文件具有正确的权限并且 PHP 具有写入访问权限。
您似乎缺少输入。请看下文
<form id="post" name="post" action="storeText.php" method="post">
<textarea name="msg" cols="" rows=""></textarea>
<input class="button" type="submit" value="POST!"/>
</form>
谢谢