Smarty comes with several built-in functions. These built-in functions are the integral part of the smarty template engine. They are compiled into corresponding inline PHP code for maximum performance. You cannot create your own custom functions with the same name; and you should not need to modify the built-in functions. A few of these functions have an assign attribute which collects the result the function to a named template variable instead of being output; much like the {assign} function. &designers.language-builtin-functions.language-function-shortform-assign; &designers.language-builtin-functions.language-function-append; &designers.language-builtin-functions.language-function-assign; &designers.language-builtin-functions.language-function-block; &designers.language-builtin-functions.language-function-call; &designers.language-builtin-functions.language-function-capture; &designers.language-builtin-functions.language-function-config-load; &designers.language-builtin-functions.language-function-debug; &designers.language-builtin-functions.language-function-extends; &designers.language-builtin-functions.language-function-for; &designers.language-builtin-functions.language-function-foreach; &designers.language-builtin-functions.language-function-function; &designers.language-builtin-functions.language-function-if; &designers.language-builtin-functions.language-function-include; &designers.language-builtin-functions.language-function-include-php; &designers.language-builtin-functions.language-function-insert; &designers.language-builtin-functions.language-function-ldelim; &designers.language-builtin-functions.language-function-literal; &designers.language-builtin-functions.language-function-nocache; &designers.language-builtin-functions.language-function-php; &designers.language-builtin-functions.language-function-section; &designers.language-builtin-functions.language-function-setfilter; &designers.language-builtin-functions.language-function-strip; &designers.language-builtin-functions.language-function-while;