PHP Full-depth Case Insensitive file_exists() Function

php-full-depth-case-insensitive-file-exists.php

<?php
/**
 * Single level, Case Insensitive File Exists.
 *
 * Only searches one level deep. Based on
 * https://gist.github.com/hubgit/456028
 *
 * @param string $file The file path to search for.
 *
 * @return string The path if found, FALSE otherwise.
 */
function fileExistsSingle($file)
{
    if (file_exists($file) === TRUE) {
        return $file;
    }

    $lowerfile = strtolower($file);

    foreach (glob(dirname($file).'/*') as $file) {
        if (strtolower($file) === $lowerfile) {
            return $file;
        }
    }

    return FALSE;

}//end fileExistsSingle()


/**
 * Case Insensitive File Search.
 *
 * @param string $filePath The full path of the file to search for.
 *
 * @return string File path if valid, FALSE otherwise.
 */
function fileExistsCI($filePath)
{
    if (file_exists($filePath) === TRUE) {
        return $filePath;
    }

    // Split directory up into parts.
    $dirs = explode('/', $filePath);
    $len  = count($dirs);
    $dir  = '/';
    foreach ($dirs as $i => $part) {
        $dirpath = fileExistsSingle($dir.$part);
        if ($dirpath === FALSE) {
            return FALSE;
        }

        $dir  = $dirpath;
        $dir .= (($i > 0) && ($i < $len - 1)) ? '/' : '';
    }

    return $dir;

}//end fileExistsCI()