Listing certain extensions in PHP Dir List

Question

Have the following to provide a dir list in an array

for($index=0; $index < $indexCount; $index++) {
        if (substr("$dirArray[$index]", 0, 1) != ".") { // don't list hidden files
 echo "<option value=\"".$dirArray[$index]."\">".$dirArray[$index]."</option>";
 }

Is there any way i can modify the above code so that only .JPG and .PNG are displayed?

Thanks!

CP

Answer 1

You can use regular expression to match if file name ends with .jpg or .png

for($index=0; $index < $indexCount; $index++) 
{
    if(preg_match("/^.*\.(jpg|png)$/i", $dirArray[$index]) == 1) 
    {
      echo "<option value=\"".$dirArray[$index]."\">".$dirArray[$index]."</option>";
    }
}

/i at the end of regular expression is case insensitive flag.

Answer 2

foreach($dirArray[$index] as $k => $v) {
     if(in_array(pathinfo($v, PATHINFO_EXTENSION), array('jpg', 'png', 'jpeg')) {
         echo '<option value="'.$v.'">'.$v.'</option>';
     }
}

I am assuming some things about your array of files. Also is there a reason you're not using the readdir() function?

Answer 3

for($index=0; $index < $indexCount; $index++) {
        if (substr($dirArray[$index], 0, 1) != "." 
            && strtolower(substr($dirArray[$index], -3)) == 'png' 
            && strtolower(substr($dirArray[$index], -3)) == 'jpg')
            echo '<option value="'.$dirArray[$index].'">'.$dirArray[$index].'</option>';
 }

This should work, but there are more elegant solutions to this, like using DirectoryIterator (see here):

foreach (new DirectoryIterator('your_directory') as $fileInfo) {
    if($fileInfo->isDot() 
        || !in_array($fileInfo->getExtension(), array('png', 'jpg'))) 
        continue;
    echo sprintf('<option value="%s">%s</option>', 
        $fileInfo->getFilename(), 
        $fileInfo->getFilename());
}

Code not tested, you might need to fiddle a bit with it.