Change the default search URL of WordPress

Open functions.php in wordpress theme directory folder inside wp-content->themes->theme name folder then copy and paste the code below inside functions.php

function change_search_url() {    
    if ( is_search() && ! empty( $_GET['s'] ) ) {        
       wp_redirect( home_url("/search/" ) . urlencode( get_query_var( 's' ) ) );          
       exit();    
  }
}

add_action( 'template_redirect', 'change_search_url' );

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