Dynamic search form for a WordPress 404 page

Show the user a useful search form when on a 404 page. Turn the query string into a search.

<form method="get" action="<?php bloginfo('url') ?>">
  <input name="s" type="text" value="<?php
    $query  = urldecode( $_SERVER['PATH_INFO'] );
    $query  = preg_replace( '/\//', ' ', $query );
    if ( @is_array( $_SERVER['argv'] ) ) {
      foreach( $_SERVER['argv'] as $arg ) {
        $arg  = explode( '=', $arg );
        $query  .= ' ' . urldecode( $arg[1] );
    echo trim( $query );
  ?>" onfocus="this.select();" />
  <input type="submit" value="Find"  />


  1. avatar
    wrote this comment on

    Can you kindly show me a demo for this hack? I wish every hack or plugin get their own demo would be a nice idea, since there are many good pieces of work in your site.
    Thank you.

  2. avatar
    wrote this comment on

    Sure, just go to some random page on my site, like nkuttler.de/does-not-exist

  3. avatar
    wrote this comment on
    AAhh.. awesome code. I even dont't know what this code means. But it's a good navigation on my blog when someone have lost in my blog. Thanks :)


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