wp-includes/class-wp-styles.php:333Prints extra CSS styles of a registered stylesheet.
$handlestring$displaybooloptionaltruestring|bool public function print_inline_style( $handle, $display = true ) { $output = $this->get_data( $handle, 'after' ); if ( empty( $output ) ) { return false; } $output = implode( "\n", $output ); if ( ! $display ) { return $output; } printf( "<style id='%s-inline-css'%s>\n%s\n</style>\n", esc_attr( $handle ), $this->type_attr, $output ); return true; }Introduced in 3.3.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-styles.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.