Resolved: str_replace doesn’t replace accurately

preg_match_all( '/<a\s+(?:[^>]*?\s+)?href=([\"\'])(.*?)\1/', $content, $matches );

$localized_url_arr = [];
$url_arr           = [];
if ( ! empty( $matches[2] ) ) {
    $current_locale = get_current_locale();

    foreach ( $matches[2] as $url ) {
        if ( preg_match( '/\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/si', $url ) ) {
            continue;
        }
        
        $new_url = add_locale_to_url( $url, $current_locale ); // this is adding locale to url eg => www.example.com --> www.example.com/us for us locale
        if ( $new_url !== $url ) {
            $localized_url_arr[] = [
                $url => $new_url
            ];
        }
    }
}  

$arr  = array_merge(...$localized_url_arr);

$content = str_replace( array_keys($arr), array_values($arr), $content );

preg_match_all( '/<a\s+(?:[^>]*?\s+)?href=([\"\'])(.*?)\1/', $content, $matches );

$localized_url_arr = [];
if ( ! empty( $matches[2] ) ) {
    $current_locale = get_current_locale();

    foreach ( $matches[2] as $url ) {
        if ( preg_match( '/\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b/si', $url ) ) {
            continue;
        }
        
        $new_url = add_locale_to_url( $url, $current_locale ); // this is adding locale to url eg => www.example.com --> www.example.com/us for us locale
        $url_pattern = "#$url(?!/us/#si";
        if ( $new_url !== $url ) {
            $localized_url_arr[$url] = $new_url
        }
    }

    $content = preg_replace(array_keys($localized_url_arr), array_values($localized_url_arr), $content );

}