Same name in other branches

1. 8.9.x core/includes/file.inc \file_create_filename()

Creates a full file path from a directory and filename.

If a file with the specified name already exists, an alternative will be used.

Parameters

$basename: String filename

$directory: String containing the directory or parent URI.

Return value

File path consisting of $directory and a unique filename based off of $basename.

Throws

RuntimeException Thrown if the $basename is not valid UTF-8 or another error occurs stripping control characters.

Related topics

3 calls to file_create_filename()

FileDirectoryTest::testFileCreateNewFilepath in modules/simpletest/tests/file.test

This will take a directory and path, and find a valid filepath that is not taken by another file.

FileDownloadTest::checkUrl in modules/simpletest/tests/file.test

Download a file from the URL generated by file_create_url().

file_destination in includes/file.inc

Determines the destination path for a file.

File

includes/file.inc, line 1250

Code

function file_create_filename($basename, $directory) {
    $original = $basename;
    // Strip control characters (ASCII value < 32). Though these are allowed in
    // some filesystems, not many applications handle them well.
    $basename = preg_replace('/[\\x00-\\x1F]/u', '_', $basename);
    if (preg_last_error() !== PREG_NO_ERROR) {
        throw new RuntimeException(sprintf("Invalid filename '%s'", $original));
    }
    if (substr(PHP_OS, 0, 3) == 'WIN') {
        // These characters are not allowed in Windows filenames
        $basename = str_replace(array(
            ':',
            '*',
            '?',
            '"',
            '<',
            '>',
            '|',
        ), '_', $basename);
    }
    // A URI or path may already have a trailing slash or look like "public://".
    if (substr($directory, -1) == '/') {
        $separator = '';
    }
    else {
        $separator = '/';
    }
    $destination = $directory . $separator . $basename;
    if (file_exists($destination)) {
        // Destination file already exists, generate an alternative.
        $pos = strrpos($basename, '.');
        if ($pos !== FALSE) {
            $name = substr($basename, 0, $pos);
            $ext = substr($basename, $pos);
        }
        else {
            $name = $basename;
            $ext = '';
        }
        $counter = 0;
        do {
            $destination = $directory . $separator . $name . '_' . $counter++ . $ext;
        } while (file_exists($destination));
    }
    return $destination;
}

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