您可以有条件地使用is_page 因此woo_custom_order_button_text 函数仅针对指定的任何页面返回：

// When any single Page is being displayed.
is_page();

// When Page 42 (ID) is being displayed.
is_page( 42 );

// When the Page with a post_title of "Contact" is being displayed.
is_page( \'Contact\' );

// When the Page with a post_name (slug) of "about-me" is being displayed.
is_page( \'about-me\' );

/*
 * Returns true when the Pages displayed is either post ID 42,
 * or post_name "about-me", or post_title "Contact".
 * Note: the array ability was added in version 2.5.
 */
is_page( array( 42, \'about-me\', \'Contact\' ) );

有不同的方法可以应用此功能。如果您想将其限制在产品和页面上，我可以尝试这样的方法checkout 是您只希望过滤器运行的页面：

if( is_page( \'checkout\' ) ) {    
  add_filter( \'woocommerce_product_single_add_to_cart_text\', \'woo_custom_cart_button_text\' );
  add_filter( \'woocommerce_order_button_text\', \'woo_custom_order_button_text\' ); 
} 

function woo_custom_cart_button_text( $text ) {
  global $product;

  if ( 123 === $product->id ) {
    $text = \'Product 123 text\';
  }
  return $text;
}


function woo_custom_order_button_text() {
    return __( \'Your new button text here\', \'woocommerce\' ); 
}