Filter to stop WordPress replacing spaces with dashes.
<?php
/**
* A copy of WordPress' sanitize_file_name function that doesn't replace
* spaces with dashes. Use on the sanitize_file_name filter to stop WordPress
* replacing filenames with dashes.
*
* ...Or don't. It's probably a bad idea.
*
* @param string $sanitized_filename The previously sanitized filename.
* @param string $filename The original unsanitized filename.
* @return string The sanitized filename, but with spaces.
*/
function my_sanitize_file_name( $sanitized_filename, $filename ) {
$filename_raw = $filename;
$special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", "%", "+", chr(0));
/**
* Filters the list of characters to remove from a filename.
*
* @since 2.8.0
*
* @param array $special_chars Characters to remove.
* @param string $filename_raw Filename as it was passed into sanitize_file_name().
*/
$special_chars = apply_filters( 'sanitize_file_name_chars', $special_chars, $filename_raw );
$filename = preg_replace( "#\x{00a0}#siu", ' ', $filename );
$filename = str_replace( $special_chars, '', $filename );
$filename = str_replace( array( '%20', '+' ), '-', $filename );
$filename = preg_replace( '/[\r\n\t-]+/', '-', $filename );
$filename = trim( $filename, '.-_' );
if ( false === strpos( $filename, '.' ) ) {
$mime_types = wp_get_mime_types();
$filetype = wp_check_filetype( 'test.' . $filename, $mime_types );
if ( $filetype['ext'] === $filename ) {
$filename = 'unnamed-file.' . $filetype['ext'];
}
}
// Split the filename into a base and extension[s]
$parts = explode('.', $filename);
// Return if only one extension
if ( count( $parts ) <= 2 ) {
/**
* Filters a sanitized filename string.
*
* @since 2.8.0
*
* @param string $filename Sanitized filename.
* @param string $filename_raw The filename prior to sanitization.
*/
return $filename;
}
// Process multiple extensions
$filename = array_shift($parts);
$extension = array_pop($parts);
$mimes = get_allowed_mime_types();
/*
* Loop over any intermediate extensions. Postfix them with a trailing underscore
* if they are a 2 - 5 character long alpha string not in the extension whitelist.
*/
foreach ( (array) $parts as $part) {
$filename .= '.' . $part;
if ( preg_match("/^[a-zA-Z]{2,5}\d?$/", $part) ) {
$allowed = false;
foreach ( $mimes as $ext_preg => $mime_match ) {
$ext_preg = '!^(' . $ext_preg . ')$!i';
if ( preg_match( $ext_preg, $part ) ) {
$allowed = true;
break;
}
}
if ( !$allowed )
$filename .= '_';
}
}
$filename .= '.' . $extension;
return $filename;
}
add_filter( 'sanitize_file_name', 'my_sanitize_file_name', 10, 2 );