media-library

You can use sanitize_file_name hook for this. function my_sanitize_file_name( $filename ) { $chars_table = array( ‘ ‘ => ‘_’, ‘-‘ => ‘_’, ); $friendly_filename = preg_replace( array_keys( $chars_table ), array_values( $chars_table ), $filename ); return strtolower( $friendly_filename ); } add_filter( ‘sanitize_file_name’, ‘my_sanitize_file_name’, 10 ); It will also convert letters to lowercase to avoid conflicts on … Read more