Keyword search of file names in PHP - php

Question

With another coder's help, I have PHP code that creates a photo gallery with auto-created thumbnail images of any image files in the directory. (It's open source, so anyone else is free to use and modify as they desire.)
I use it as a stock photo library and the file names include the keywords for that image. For example, one might be businessman-tie-suit-briefcase-office-meeting.jpg.
I've been trying to add a keyword search input that looks at the file names, but cannot figure out how to proceed. I've built keyword searches for a database, but this directory file name search is new to me.
Here's the relevant code of the page:
<?
$gallery = $_GET["gallery"];
$dir = $dir.$gallery."/";
//Put files into an array
// create a handler to the directory
$dirhandler = opendir($dir);
// read all the files from directory
$nofiles=0;
while ($file = readdir($dirhandler)) {
// if $file isn't this directory or its parent
//add to the $files array
if ($file != '.' && $file != '..')
{
$nofiles++;
$files[$nofiles]=$file;
}
}
//close the handler
closedir($dirhandler);
//Back button to appear at the top of each page to go to the previous directory if not on the main page
if ($gallery !="" or $keyword !="")
{
echo "<div><a href='javascript:history.go(-1)'><img src='images/up.png' border='0'></a></div>";
}
// BEGINNING ADD FOR KEYWORD SEARCH
// KEYWORD SEARCH BOX- create text box to search entire directory for that keyword and display page in grid pattern with results
?>
<div style='position:relative; left:10px;'>
<form action='index_search.php?keyword=$keyword' method='get' name='search'>
<input type='text' name='keyword' size='25'>
<input type='submit' value='Search Keyword'>
</form>
</div>
<?
//*************************************************************************//
// PERFORM KEYWORD SEARCH
if ($keyword !="")
{
echo "<div class='keytext'>Keyword search: <b>" . $keyword . "</b><br/></div>";
/*********************************************************************************************************/
/* ***** THIS IS WHERE THE SEARCH OF DIRECTORY FILES NEEDS TO OCCUR AND OUTPUT RESULTS AS $files */
/* get results where $file LIKE %$keyword%; */
/*********************************************************************************************************/
//Show images
foreach ($files as $file)
{
if ($file!="."&&$file!="..")
{
$extention = explode('.', $file);
if ($extention[1] != "")
{
echo "<div class='imgwrapper'>";
echo"<a class='fancybox' rel='group'' href='$dir$file' return false' title='$filename'>";
echo "<img src='timthumb.php?src=$dir$file&h=$height&w=$width' alt='$extention[0]' width='$width' height='$height'/>";
echo"</a><br/>";
$file_name = current(explode('.', $file));
echo substr($file_name,0,21);
echo "</div>";
}
}
}
}
else { // starts the split from keyword or no keyword
//***********************************************************************//
// sort folder names alphabetically, ignore case
natcasesort($files);
//Show the folders
foreach ($files as $file){
if ($file!="."&&$file!="..")
{
sort($files); //Sorts the array (file names) alphabetically -- not the directory/folder names
$extention = explode('.', $file);
if ($extention[1] == "")
{
echo "<div class='imgwrapper'>";
echo "<a href='?gallery=$gallery/$file'>";
echo "<img src='images/folder.jpg' border='0'>";
echo "<div class='folder'>";
echo current(explode('.', $file));
echo "</a>";
echo "</div>";
echo "</div>";
}
}
}
?>
<div style="clear:both"></div>
<?
//Show images
foreach ($files as $file){
if ($file!="."&&$file!="..")
{
$extention = explode('.', $file);
if ($extention[1] != "")
{
echo "<div class='imgwrapper'>";
echo"<a class='fancybox' rel='group'' href='$dir$file' return false' title='$filename'>";
echo "<img src='timthumb.php?src=$dir$file&h=$height&w=$width' alt='$extention[0]' width='$width' height='$height'/>";
echo"</a><br/>";
echo "<div class='title'>";
$file_name = current(explode('.', $file));
echo substr($file_name,0,125);
echo "</div>";
echo "</div>";
}
}
}
}
?>
I have the area commented out where I believe the search string would be executed, as the display code is already there. I've tried a few things that didn't work, so didn't bother listing any of it.
Any ideas if I'm going about this the wrong way?
Thanks in advance.

Answer 1

if ($extention[1] != "")
{
if(stripos($file, $keyword) !== false)
{...
}
}
See (stripos() manual)

Answer 2

I was able to get this resolved from some outside help.
if ($file!="."&&$file!="..")
{
sort($files); //Sorts the array (file names) alphabetically -- not the directory/folder names
$extention = explode('.', $file);
if ($extention[1] == "")
{
$dir = "pics/";
$dir = $dir.$file."/";
$dirhandler = opendir($dir);
// read all the files from directory
$nofiles=0;
$files2=array();
while ($file2 = readdir($dirhandler)) {
if ($file2 != '.' && $file2 != '..')
{
$nofiles++;
$files2[$nofiles]=$file2;
}
}
closedir($dirhandler);
sort($files2); //Sorts the array (file names) alphabetically -- not the directory/folder names
//Show images
foreach ($files2 as $file2){
if ($file2!="."&&$file2!="..")
{
$extention = explode('.', $file2);
if ($extention[1] != "" && stripos($file2,$keyword)!==false)
{
echo "<div class='imgwrapper'>";
echo"<a class='fancybox' rel='group'' href='$dir$file2' return false' title='$filename'>";
echo "<img src='timthumb.php?src=$dir$file2&h=$height&w=$width' alt='$extention[0]' width='$width' height='$height'/>";
echo"</a><br/>";
echo "<div class='title'>";
$file2_name = current(explode('.', $file2));
echo substr($file2_name,0,125);
echo "</div>";
echo "</div>";
}
}
}
}