How to remove the WordPress version from some .css/.js files

I know that I can use the following function to remove the version from all .css and .js files:

add_filter( 'style_loader_src', 'sdt_remove_ver_css_js', 9999 );
add_filter( 'script_loader_src', 'sdt_remove_ver_css_js', 9999 );
function sdt_remove_ver_css_js( $src ) {
    if ( strpos( $src, 'ver=' ) )
        $src = remove_query_arg( 'ver', $src );
    return $src;
}

But I have some files, for instance style.css, in the case of which I want to add a version in the following way:

function css_versioning() {
    wp_enqueue_style( 'style',
        get_stylesheet_directory_uri() . '/style.css' ,
        false,
        filemtime( get_stylesheet_directory() . '/style.css' ),
        'all' );
}

But the previous function removes also this version. So the question is how to make the two work together?

Answers:

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Method 1

You can check for the current handle before removing the version.

Here’s an example (untested):

add_filter( 'style_loader_src',  'sdt_remove_ver_css_js', 9999, 2 );
add_filter( 'script_loader_src', 'sdt_remove_ver_css_js', 9999, 2 );

function sdt_remove_ver_css_js( $src, $handle ) 
{
    $handles_with_version = [ 'style' ]; // <-- Adjust to your needs!

    if ( strpos( $src, 'ver=' ) && ! in_array( $handle, $handles_with_version, true ) )
        $src = remove_query_arg( 'ver', $src );

    return $src;
}

Method 2

Since this question was written, a lot has changed with WordPress. Here is a new way to prevent WordPress from displaying its version number:

// remove version from head
remove_action('wp_head', 'wp_generator');

// remove version from rss
add_filter('the_generator', '__return_empty_string');

// remove version from scripts and styles
function remove_version_scripts_styles($src) {
    if (strpos($src, 'ver=')) {
        $src = remove_query_arg('ver', $src);
    }
    return $src;
}
add_filter('style_loader_src', 'remove_version_scripts_styles', 9999);
add_filter('script_loader_src', 'remove_version_scripts_styles', 9999);

No editing required. Add to functions.php and done. Or add via simple custom plugin. The choice is yours! 🙂

Original article

Method 3

To target a specific file

// remove version from scripts and styles
function remove_version_scripts_styles($src) {
    if (strpos($src, 'yourfile.js')) {
        $src = remove_query_arg('ver', $src);
    }
    return $src;
}
add_filter('script_loader_src', 'remove_version_scripts_styles', 9999);

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0