Programming

PHP list sorting

There are times that I have a large list of data which I need to strip out duplicates, and sort. This is really easy to do from the bash shell, but it would be quicker if I had a web interface which would eliminate having to make temporary files and open up a shell window.

Here is the demo of the code.

And here is the source:

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<?php
print "<pre>";

function array_trim($a) { $j = 0; for ($i = 0; $i < count($a); $i++) { if ($a[$i] != "") { $b[$j++] = $a[$i]; } }
	return $b; 
}
function array_diff2($first, $second) {
  $res = array();
  foreach($first as $key => $val) {
    $found = false;
    foreach($second as $key2 => $val2) {
      if ($val == $val2) {
        $found = true;
        break;
      }
    }
    if (!$found) {
      $res[$key] = $val;
    }
  }
  return $res;
}

if ($_POST){
  $nicelist = split("\n",$_POST[input]);
  if ($sorttype = "SORT_REGULAR") sort ($nicelist,SORT_REGULAR);
  if ($sorttype = "SORT_NUMERIC") sort ($nicelist,SORT_NUMERIC);
  if ($sorttype = "SORT_STRING")  sort ($nicelist,SORT_STRING);
  $nicelist = array_unique ($nicelist);
  if ($_POST[removelist]){
    #$remove .= "\n";
    $remove = split("\n",$_POST[removelist]);
    $nicelist = array_merge(array_diff2($nicelist, $remove));
  }
  $nicelist = implode("\n", $nicelist);
  $nicelist = str_replace("\\'","'",$nicelist);
  $output = $nicelist;
}
print "</pre>";
?>
<div align="center"><font size="+3" face="Verdana, Arial, Helvetica, sans-serif">Sort
  list</font><font face="Verdana, Arial, Helvetica, sans-serif"><br>
  <font size="-2">Put anything in Input, and hit submit.<br>
  It will be sorted and returned to the output.<br>
  Put items to be removed in remove list.</font><br>
  &nbsp; </font> </div>
<form name="form1" method="post" action="">
  <table width="10%" border="0" align="center" cellpadding="0" cellspacing="0">
    <tr align="center" valign="top">
      <td>Input / Output:<br> <textarea name="input" cols="35" rows="15" id="input"><?=$output;?></textarea>
        <?= $outputcount; ?>values<br>
      </td>
      <td>&nbsp;&nbsp;&nbsp;</td>
      <td>Remove list:<br>
        <textarea name="removelist" cols="35" rows="15" id="removelist"><?=$_POST[removelist];?></textarea>
      </td>
    </tr>
    <tr align="center">
      <td align="left">Sort method:<br>
        <input name="sorttype" type="radio" value="SORT_REGULAR" checked>
        compare items normally<br>
        <input name="sorttype" type="radio" value="SORT_NUMERIC">
        compare items numerically<br>
        <input type="radio" name="sorttype" value="SORT_STRING">
        compare items as strings</td>
      <td>&nbsp;</td>
      <td>&nbsp;</td>
    </tr>
    <tr align="center">
      <td colspan="3">&nbsp;<br> <input type="submit" name="Submit" value="Submit"></td>
    </tr>
  </table>
</form>