Reference path problem: relative path and absolute path
Relative path: index.php settings relative to the intersection file
Absolute path: Starting from the Virtual host site Directory
CSS style files introduce pictures, path settings
Relative address: The relative CSS file itself is set
① template files into CSS style files
(The relative path of the CSS can be set relative to the index.php portal file)
Index.php+controler Controller + Template file = = Mixed file introduced into CSS file
② template file introduces a CSS style file into IMG image
Index.html-->css style-->img Pictures
(The relative path to the picture is the CSS file itself)
CSS style files are sent by the browser a separate request, so the internal images relative to the CSS file is related to the other files do not matter
File is introduced by WHO, its relative address is relative to the introduction of file Settings
Template file introduced into CSS style file