Adding foreach-like features to the Smarty automatically load data method

The first step: add in the _compile_tag function of Smarty_Compiler.class.php:

Copy the code code as follows:

Start tag for loading data
Case ' Load ':
$this->_push_tag (' Load ');
return $this->_complie_load_start ($tag _args);
Break
End tag for loading data
Case '/load ':
$this->_pop_tag (' Load ');
return "<php Endforeach; endif Unset (/$_from);?> ";
Break
Step Two: Add a method:

Copy the code code as follows:

/**
* Load Data
* @param $tag _args
*/
function _complie_load_start ($tag _args)
{
$key = substr (MD5 ($tag _args), 8, 16); Generate a special variable name based on the parameter
$attrs = $this->_parse_attrs ($tag _args);
More processing can be added here.
$class = (!isset ($attrs [' class ')] | | empty ($attrs [' class '])? ' Cls_crud ': Trim ($attrs [' class ']);
(!isset ($attrs [' table ']) | | empty ($attrs [' table]]) && exit (' table ' is empty! ');
$db = $class:: Factory (Array (' table ' = = substr ($attrs [' table '], 1,-1)));
Defining new variables
$this->_tpl_vars[$key] = $db->get_block_list (Array (substr ($attrs [' where '], 1,-1)), $attrs [' limit ']);
$tag _args = "from=/${$key}". $tag _args;
Call the foreach tag handler to process
return $this->_compile_foreach_start ($tag _args);
}
This allows you to use the load tag in the template. Usage Example:

Copy the code code as follows:

{Load table= "test" where= "' id ' <100" limit=10 Item=rec}
...
{/load}

$i = 0;
$t = Microtime (true);
for (; $i <1000; $i + +)
{
$STR = STRTR (MD5 ($i), $p 2);
}
Var_dump (Microtime (True)-$t); 0.085476875305176
$t = Microtime (true);
for (; $i <2000; $i + +)
{
$str = Preg_replace ($p, ", MD5 ($i));
}
Var_dump (Microtime (True)-$t); 0.09863805770874
The results showed that the efficiency of STRTR was about 15% higher than that of preg_replace.
Taking advantage of the weekend, check out the strtr PHP Source:

Copy the code code as follows:

Php_function (STRTR)
{
Zval **str, **from, **to;
int ac = Zend_num_args ();
Parameter checking (the ZEND_GET_PARAMETERS_EX function is defined in the Zend_api.c file)
if (AC < 2 | | AC > 3 | | zend_get_parameters_ex (AC, &str, &from, &to) = = FAILURE) {
Wrong_param_count;
}
Parameter check
if (ac = = 2 && z_type_pp (from)! = Is_array) {
Php_error_docref (NULL tsrmls_cc, E_warning, "the second argument is not an array.");
Return_false;
}
CONVERT_TO_STRING_EX (str);
/* Shortcut for empty string */
Macro Z_strlen_pp defined in Zend_operators.h
if (z_strlen_pp (str) = = 0) {
Return_empty_string ();
}
if (ac = = 2) {
Php_strtr_array (Return_value, z_strval_pp (str), Z_STRLEN_PP (str), hash_of (*from));
} else {
CONVERT_TO_STRING_EX (from);
CONVERT_TO_STRING_EX (to);
Zval_stringl (Return_value, z_strval_pp (str), Z_STRLEN_PP (str), 1);
PHP_STRTR (Z_strval_p (Return_value),
Z_strlen_p (Return_value),
Z_strval_pp (from),
Z_STRVAL_PP (To),
MIN (Z_strlen_pp (from),
Z_STRLEN_PP (to));
}
}

Adding foreach-like features to the Smarty automatically load data method