PHP tips: Explain the phplib template application process and running principle

For more information, see "htmlheadbody! -- BEGINRowSort -- {SortList} br! -- ENDRowSort --/body/head/htmlindex. php content :? $ T-set_file (Index, inde

Detailed description of phplib template application process and running principle

Index.htm file content:

{SortList}

Index. php content:

$ T-> set_file ('index', 'index.htm ');
$ T-> set_block ('index', 'rowsort ', 'rowssort ');
........................................ ......
... $ List_sort ...................
$ T-> set_var ('sortlist', $ list_sort );
$ T-> parse ('rowssort ', 'rowsort', true );
........................................ ......
........................................ ......
$ T-> parse ('out', 'index ');
$ T-> p ('out ');
?>

Specific analysis process:

1. $ t-> set_file ('index', 'index.htm'); $ this-> file [Index] = index.htm

2. $ t-> set_block ('index', 'rowsort ', 'rowssort ');

1. load the index.htm content of the indexfile and assign it to the variable $ this-> varvals [index]
2. $ str = $ this-> varvals [index] get template file content
3. use the preg_match_all function to match the content in the corresponding block (RowSort) in the template file and store it in $ m [1] [0 ].
4. Why 0? Switch the content (including the header and tail) in the Φ Phi shortlock (RowSort) to {RowSort}
5. variable $ this-> varvals [RowSort] = $ m [1] [0], $ this-> varkeys [RowSort] =/{RowSort }/
6. variable $ this-> varvals [index] = $ str (the content has changed. see Step 2), $ this-> varkeys [index] =/{index }/

III. $ t-> set_var ('sortlist', $ list_sort );

Set $ this-> varvals [SortList] = $ list_sort
Set $ this-> varkeys [SortList] =/{SortList }/

4. $ t-> parse ('rowssort ', 'rowsort', true); (this control is repeated based on the sort size)

1. use the subst function to process all the variable values in the $ this-> varvals array against the special characters \ and $ that may be contained in the variable values (\ and $ to distinguish between \ and \ $, this ensures that the next step of preg_replace does not appear unexpectedly), and assigns it to the $ varvals_quoted array.
2. $ str = $ this-> varvals [RowSort]
3. we can see that $ str contains a {SortList}, which is composed of three: $ this-> varkeys [SortList] =/{SortList }/, $ this-> varvals [SortList] = $ list_sort
4. after preg_replace, we can see that $ str is the content after the PHP template variable {SortList} has been parsed, and $ str is returned.
5. assign a continuation value to $ this-> varvals [RowSort] // There is a title here. you may consider that the {RowSort} at the beginning of the display is not parsed, so don't worry, phplib has the finish function to process it based on your request.

5. $ t-> parse ('out', 'index ');

1. as you can see, $ this-> varvals [index] has a PHP template variable to be parsed, that is, {RowSort}
2. in the previous steps, we have resolved the content of $ this-> varvals [RowSort ].
3. in this way, all the PHP template variables have been parsed and assigned to the variable $ this-> varvals [OUT].