PHP self-writing simple template engine for beginners to learn

PHP self-writing simple template engine, for beginners to learn something to write today, suddenly think of using the template engine. I wrote one easily and sent it to new users for learning. After such a long time in PHP, I thought it was a real emotion. after studying things for a few days, now I have finished it in an hour or two. the goddess who completed the game together is unknown now... Here is the code:

 Tpl_dir = $ tpl_dir; if (isset ($ cache_dir) $ this-> cache_dir = $ cache_dir; if (isset ($ tpl_ext) $ this-> tpl_ext = $ tpl_ext; if (isset ($ var_left) $ this-> var_left = $ var_left; if (isset ($ var_right) $ this-> var_right = $ var_right ;} function load ($ tplfilename) {$ tplfile = $ this-> tpl_dir. '/'. $ tplfilename. $ this-> tpl_ext; if (! File_exists ($ tplfile) die ('Template not found :'. $ tplfile); return $ this-> cache ($ tplfilename, $ tplfile);} // determines whether the template is cached. if the template file is changed, recompile the function cache ($ tplname, $ tpl_file) {$ cache_file = $ this-> cache_dir. '/'. md5 ($ tplname ). '. php'; if (! File_exists ($ cache_file) | filemtime ($ tpl_file)> filemtime ($ cache_file) $ this-> compile ($ tpl_file, $ cache_file); return $ cache_file ;} // compile the template content to the PHP format and write the cache function compile ($ tpl, $ cache) {$ body = file_get_contents ($ tpl); $ vl = $ this-> var_left; $ vr = $ this-> var_right; $ patterns = array ("# $ vl \ s * include :(. + ?) \ S * $ vr # I "," # $ vl \ s * if \ s + (. + ?) \ S * $ vr # I "," # $ vl \ s * else \ s * $ vr # I "," # $ vl \ s * elseif \ s + (. + ?) \ S * $ vr # I "," # $ vl \ s * endif \ s * $ vr # I ", "# $ vl \ s */if \ s * $ vr # I", "# $ vl \ s * foreach \ s + (. + ?) :(. + ?) \ S * $ vr # I "," # $ vl \ s * endforeach \ s * $ vr # I ", "# $ vl \ s */foreach \ s * $ vr # I", "# $ vl ([0-9a-zA-Z _] + ?) \. ([0-9a-zA-Z _] + ?) \. ([0-9a-zA-Z _] + ?) $ Vr # I "," # $ vl ([0-9a-zA-Z _] + ?) \. ([0-9a-zA-Z _] + ?) $ Vr # I "," # $ vl ([0-9a-zA-Z _ \ [\] \ '\ "] + ?) $ Vr # I "," # $ vl ([0-9a-zA-Z _] + ?) :(.*?) $ Vr # I "); $ replacements = array ("
 ","
 ","
 ","
 ","
 ","
 ","
 0): \ $ autoindex = 0; foreach ($ \ 1 as \ 2): \ $ autoindex ++;?> ","
 ","
 ","
 ","
 ","
 ","
 "); $ Body = preg_replace ($ patterns, $ replacements, $ body); file_put_contents ($ cache, $ body) ;}}$ view = new view (); function show ($ tpl) {global $ view; return $ view-> load ($ tpl );}

Usage php file:

 'Rows ',' B '=> array ('C' => 'array'); include show ('index ');

How to use the HTML template file:

{Title}
 Hello, for reference only
{A. a} {a. B. c}
{Foreach a: $ v} {autoindex}. {v}
{/Foreach}{Include: footer}

The template file is placed in the template directory, and the cache is placed in the cahce Directory. both directories must be created manually. Available

{Include: subtemplate}

{If condition}

{Foreach variable: as Statement}, $ autoindex is the auto-incrementing variable

{Call function: parameter}

{Variable}, including simplified writing of array variables (up to three-dimensional arrays are supported)

.

Well, the implementation of the entire template engine is relatively simple, because it has always liked this include method template, just for beginners to learn the principle.

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