Question

我很难做一个简单的聊天功能。我的代码有两个问题：

我希望新帖子显示在文本文件的顶部。
我希望输入按钮能够将一些html代码写入textarea，以便在使用时更容易合成文本。

以下是代码：

<script type="text/javascript">
forma1 = "<B>   </B>"
forma2 = "<font color="#B2E0B2">        </font>"
forma3 = "<font color="#C2E0FF">        </font>"
forma4 = "<font color="#FFC2C2">        </font>"
</script>

    <form method="post">
<div align="center">
  <input name="navn" type="text" size="30" style="color:#68748D;" value="Navn" onfocus="if (this.value == 'Navn') this.value = '';"/>
    <input type="button" onkeypress="form1('area');"/>
    <input type="button" onkeypress="form2('area');"/>
    <input type="button" onkeypress="form3('area');"/>
    <input type="button" onkeypress="form4('area');"/>
  <br>
  <textarea name="txt" cols="55" rows="5" id="area"></textarea>
  <br><br> <input type="submit" value="Send" name="submit" class="a" />
</div>
  <?php
  if ( isset( $_POST[ 'submit' ] ) ) {
    $dude  = $_POST ['navn'];
    $time = gmdate("M d Y H:i:s",time()+(2*60*60));
    $com  = $_POST['txt'];
    $fp = $file = fopen( "msgs.txt", "a");
    fwrite($file, $time);
    fwrite($file, "<br>");
    fwrite($file, '<font color="#68748D" style="font-weight:800;" size="+2">');
    fwrite($file, $dude);
    fwrite($file, '</font>');
    fwrite($file, "<br>");
    fwrite($file, $com);
    fwrite($file, "<br>________________________________________________________________________<br>" );
    fclose($fp);
   echo '<script type="text/javascript">window.location ="";</script>';
  }
  ?>

  <br>
</form>
<font><b><p>Output: </p></b></font>
<fontcolor="#000" size="2">
  <?php
  if (file_exists("msgs.txt")) {
  $file = fopen( "msgs.txt", "r" );
  echo fread( $file, filesize( "msgs.txt" ) );
  fclose( $file );
  }
  ?>
</font>

谢谢。

Answer 1

我可以使用Need to write at beginning of file with PHP回复写入文件开头的内容：

$file_data = "Stuff you want to add\n";
$file_data .= file_get_contents('msgs.txt');
fwrite('msgs.txt', $file_data);

php手册说fwrite和file_put_contents是相同的，所以这应该仍然有用

输入按钮到textarea和writingorder

1 个答案: