Detailed introduction to writing Smarty plug-ins to load data directly in templates_PHP tutorial

When I used smarty before, I usually read data on the PHP terminal (usually from the database), and then assigned variables to the template before I could use this variable on the front end. This is not bad, but when there is a lot of data, it is a bit troublesome to maintain the code on the PHP side, especially when there is a lot of templated data.

So I wrote a plug-in, which can be combined with the previous crud class implementation to load some modularized data in the front-end template.

Copy code The code is as follows:

/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */
/**
 * Smarty {load_data} function plugin
 *
 * Type:     function

 * Name:     eval

 * Purpose:  evaluate a template variable as a template

 * @link http://smarty.php.net/manual/en/language.function.eval.php {eval}
 * @param array
 * @param Smarty
 */
function smarty_function_load_data($params, &$smarty)
{
$class = (!isset($params['class']) || empty($params[ 'class'])) ? 'cls_crud' : trim($params['class']);
(!isset($params['table']) || empty($params['table'])) && exit(''table` is empty!');
$db = $class::factory(array('table' => $params['table']));
//var_dump( $params);
if (!empty($params['assign'])) {
//Assign the data to the variable $params['assign'] so that the front end can use this variable (for example It can be combined with foreach to output a list, etc.) ]));
}
}
?>

Written as a plug-in, in addition to reducing a lot of maintenance, another significant benefit is that you can query in this plug-in Database operations perform unified formatting and filtering operations.

In this way, you can load data on the front end like this:

Copy the code The code is as follows:

{load_data assign="list" table="test" where="`id`<100" limit=10}
{foreach from=$list item=rec}
. ..
{/foreach}

http://www.bkjia.com/PHPjc/327902.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/327902.htmlTechArticleWhen I used smarty before, I usually read the data in the php terminal (usually from the database), and then assigned it to Only template variables can be used in the front end. Isn’t that a bad thing...