GtkEntry::append_text
警告！这个方法在 PHP-GTK 2 中被废弃， 并且不应当在新的代码中使用。
Appends text to the current text value of the entry.
DEPRECATED. This
method should not be used in newly written code. Use get_text() and set_text() instead.
同时参考： get_text() , prepend_text() , set_text()