Insert terms dynamically

<?php if ( php_sapi_name() !== 'cli' || isset( $_SERVER['REMOTE_ADDR'] ) ) {
    die( 'CLI Only' );
}

// Get first arg
if ( ! isset( $argv ) || count( $argv ) < 3 ) {
    echo "Missing parameters.\n";
    echo "script usage: php bea-insert-terms.php [taxonomy](required, must be already registered) [terms](required, list of terms to be inserted comma separated) \n";
    die();
}

//Domain
$domain   = ( isset( $argv[1] ) ) ? $argv[1] : '';
$taxonomy = ( isset( $argv[2] ) ) ? $argv[2] : '';
$terms    = ( isset( $argv[3] ) ) ? explode( ",", $argv[3] ) : array();

// Fake WordPress, build server array
$_SERVER = array(
    'HTTP_HOST'       => $domain,
    'SERVER_NAME'     => $domain,
    'REQUEST_URI'     => '',
    'REQUEST_METHOD'  => 'GET',
    'SCRIPT_NAME'     => basename( __FILE__ ),
    'SCRIPT_FILENAME' => basename( __FILE__ ),
    'PHP_SELF'        => basename( __FILE__ )
);

// Load WordPress
$bootstrap = 'wp-load.php';
while ( ! is_file( $bootstrap ) ) {
    if ( is_dir( '..' ) ) {
        chdir( '..' );
    } else {
        die( 'EN: Could not find WordPress! FR : Impossible de trouver WordPress !' );
    }
}

require_once( $bootstrap );

/**
 * Class BEA_Insert_Terms
 * The purpose is to pass a list of terms to insert in specified taxonomy
 */
class BEA_Insert_Terms {

    /**
     * Insert terms dynamically
     *
     * @author Julien Maury
     * @param string $taxonomy targeted taxonomy
     * @param array $terms list of terms to be inserted
     * @return void
     */
    public static function insert_terms( $taxonomy, $terms = array() ) {

        if ( ! is_string( $taxonomy ) ) {
            echo sprintf( 'This parameter should be a string please !' ) . PHP_EOL;
            exit( 1 );
        }

        if ( ! taxonomy_exists( $taxonomy ) ) {
            echo sprintf( 'This taxonomy is not even registered here, break your legs !' ) . PHP_EOL;
            exit( 1 );
        }

        $i = 0;
        foreach ( $terms as $term ) {
            $i ++;
            $insert = wp_insert_term( $term, $taxonomy );
            echo is_wp_error( $insert ) ? sprintf( '%s was not inserted : %s', $term, $insert->get_error_message() ) . PHP_EOL : sprintf( '%s inserted successfully :)', $term ) . PHP_EOL;
        }

        echo sprintf( '%d terms inserted in %s', $i, $taxonomy ) . PHP_EOL;
        exit( 0 );
    }

}

BEA_Insert_Terms::insert_terms( $taxonomy, $terms );