Loads a template file. If caching is on, then it checks whether a "prepared" template exists. If it does, it gets loaded instead of the original, if it does not, then the original gets loaded and prepared and then the prepared version is saved. addBlockfile() and replaceBlockfile() implement quite the same logic.
filename
remove unknown/unused variables?
remove empty blocks?
Table 41-1. Possible PEAR_Error values
| Error code | Error message | Reason | Solution |
|---|---|---|---|
| SIGMA_TPL_NOT_FOUND | Cannot read the template file '$filename' | File is unreadable for some reason | Check if the file exists and has correct permissions set |
| SIGMA_CACHE_ERROR | Cannot save template file 'filename' | A prepared template file cannot be saved | Check if the directory for prepared templates cache exists and is writeable for your script |
| SIGMA_BLOCK_DUPLICATE | The name of a block must be unique within a template. Block 'blockname' found twice. | The loaded file contains two blocks sharing the same name | Check the file and rename one of the the blocks to something else |
| SIGMA_CALLBACK_SYNTAX_ERROR | Cannot parse template function: (error description) | Bogus syntax for template function parameters. | Fix the template function definition, pay special attention to quoting rules. |
see HTML_Template_Sigma::setTemplate(), HTML_Template_Sigma::$removeUnknownVariables, HTML_Template_Sigma::$removeEmptyBlocks