一个输入框，查询txt的内容怎么做了?

<?php
$file_handle = fopen("txt.txt", "r");
if ($file_handle)
{
  $i = 0;
  while ( ! feof($file_handle) )
  {
  $buffer = fgets($file_handle, 4096);
  $data[$i] = $buffer;
  $i ++;
  }
  fclose($file_handle);
}
foreach ($data as $k =>$v) {
  if (strpos($v, '要查询的') !== false) {
  echo "$v<br />";
  }
}

?>


怎么把“要查询的”换成是textbox 再加个button

<?php
$file_handle = fopen("txt.txt", "r");
if ($file_handle)
{
  $i = 0;
  while ( ! feof($file_handle) )
  {
  $buffer = fgets($file_handle, 4096);
  $data[$i] = $buffer;
  $i ++;
  }
  fclose($file_handle);
}
foreach ($data as $k =>$v) {
  if (strpos($v, '要查询的') !== false) {
  $v = str_replace('要查询的', 'textbox <input type="button" name="" value="button">', $v);
  echo "$v<br />";
  }
}

?>

不是吧。我想吧这个PHP应该是放到 form里面的 action

  <form action="s.php" method="search" name="ipform" id="search" onsubmit="submit">
  <tr>
  <td onmouseover="this.style.backgroundColor='#E6F2E7'" onmouseout="this.style.backgroundColor=''" bgcolor="#cce6cd"><div style="text-align:center;font-size:14px; font-weight:bold; line-height:25px">输入:</div></td>
  </tr>
  <tr>
  <td style="padding:15px"><div style="text-align:center;">
  <input name="ip_num" id="ip_num" value="<?=$pre_words?>" size="30" />
  &nbsp;
  <input type="submit" value="提 交" name="Submit" />
  <input id="act" type="hidden" value="1" name="act" />
  </div>
  </td>
  </tr>
  </form>

$pre_words 这个是input要查的。
查询出来