PHP Case Insensitive Version of file_exists()

Question

I\'m trying to think of the fastest way to implement a case insensitive file_exists function in PHP. Is my best bet to enumerate the file in the directory and do a strtolowe

Answer 1

Just ran across this today, but didn't like any of the answers here, so I thought I would add my solution ( using SPL and the regex iterator )

function _file_exists( $pathname ){
    if(file_exists($pathname)) return $pathname;

    try{
        $path = dirname( $pathname );
        $file = basename( $pathname );

        $Dir = new \FilesystemIterator( $path, \FilesystemIterator::UNIX_PATHS );
        $regX = new \RegexIterator($Dir, '/(.+\/'.preg_quote( $file ).')$/i', \RegexIterator::MATCH);

        foreach ( $regX as $p ) return $p->getPathname();

    }catch (\UnexpectedValueException $e ){
        //invalid path
    }
    return false;
}

The way I am using it is like so:

 $filepath = 'path/to/file.php';

 if( false !== ( $filepath = _file_exists( $filepath ))){
      //do something with $filepath
 }

This way it will use the built in one first, if that fails it will use the insensitive one, and assign the proper casing to the $filepath variable.

Answer 2

I tuned the function a lil bit more. guess this better for use

function fileExists( $fileName, $fullpath = false, $caseInsensitive = false ) 
{
    // Presets
    $status         = false;
    $directoryName  = dirname( $fileName );
    $fileArray      = glob( $directoryName . '/*', GLOB_NOSORT );
    $i              = ( $caseInsensitive ) ? "i" : "";

    // Stringcheck
    if ( preg_match( "/\\\|\//", $fileName) ) // Check if \ is in the string
    {
        $array    = preg_split("/\\\|\//", $fileName);
        $fileName = $array[ count( $array ) -1 ];
    }

    // Compare String
    foreach ( $fileArray  AS $file )
    {
        if(preg_match("/{$fileName}/{$i}", $file))
        {
            $output = "{$directoryName}/{$fileName}";
            $status = true;
            break;
        }
    }

    // Show full path
    if( $fullpath && $status )
        $status = $output;

    // Return the result [true/false/fullpath (only if result isn't false)]
    return $status;
}