mirror of https://github.com/avecms/AVE.cms.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
3.4 KiB
109 lines
3.4 KiB
<?php |
|
/** |
|
* Smarty plugin |
|
* This plugin is only for Smarty2 BC |
|
* |
|
* @package Smarty |
|
* @subpackage PluginsFunction |
|
*/ |
|
|
|
/** |
|
* Smarty {math} function plugin |
|
* Type: function<br> |
|
* Name: math<br> |
|
* Purpose: handle math computations in template |
|
* |
|
* @link http://www.smarty.net/manual/en/language.function.math.php {math} |
|
* (Smarty online manual) |
|
* @author Monte Ohrt <monte at ohrt dot com> |
|
* |
|
* @param array $params parameters |
|
* @param Smarty |
|
* |
|
* @return string|null |
|
*/ |
|
function smarty_function_math($params, &$smarty) |
|
{ |
|
static $_allowed_funcs = |
|
array('int' => true, 'abs' => true, 'ceil' => true, 'cos' => true, 'exp' => true, 'floor' => true, |
|
'log' => true, 'log10' => true, 'max' => true, 'min' => true, 'pi' => true, 'pow' => true, 'rand' => true, |
|
'round' => true, 'sin' => true, 'sqrt' => true, 'srand' => true, 'tan' => true); |
|
// be sure equation parameter is present |
|
if (empty($params[ 'equation' ])) { |
|
trigger_error("math: missing equation parameter", E_USER_WARNING); |
|
|
|
return; |
|
} |
|
|
|
$equation = $params[ 'equation' ]; |
|
|
|
// make sure parenthesis are balanced |
|
if (substr_count($equation, "(") != substr_count($equation, ")")) { |
|
trigger_error("math: unbalanced parenthesis", E_USER_WARNING); |
|
|
|
return; |
|
} |
|
|
|
// disallow backticks |
|
if (strpos($equation, '`') !== false) { |
|
trigger_error("math: backtick character not allowed in equation", E_USER_WARNING); |
|
|
|
return; |
|
} |
|
|
|
// also disallow dollar signs |
|
if (strpos($equation, '$') !== false) { |
|
trigger_error("math: dollar signs not allowed in equation", E_USER_WARNING); |
|
|
|
return; |
|
} |
|
|
|
foreach ($params as $key => $val) { |
|
if ($key != "equation" && $key != "format" && $key != "assign") { |
|
// make sure value is not empty |
|
if (strlen($val) == 0) { |
|
trigger_error("math: parameter '{$key}' is empty", E_USER_WARNING); |
|
|
|
return; |
|
} |
|
if (!is_numeric($val)) { |
|
trigger_error("math: parameter '{$key}' is not numeric", E_USER_WARNING); |
|
|
|
return; |
|
} |
|
} |
|
} |
|
|
|
// match all vars in equation, make sure all are passed |
|
preg_match_all('!(?:0x[a-fA-F0-9]+)|([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)!', $equation, $match); |
|
|
|
foreach ($match[ 1 ] as $curr_var) { |
|
if ($curr_var && !isset($params[ $curr_var ]) && !isset($_allowed_funcs[ $curr_var ])) { |
|
trigger_error("math: function call '{$curr_var}' not allowed, or missing parameter '{$curr_var}'", E_USER_WARNING); |
|
|
|
return; |
|
} |
|
} |
|
|
|
foreach ($params as $key => $val) { |
|
if ($key != "equation" && $key != "format" && $key != "assign") { |
|
$equation = preg_replace("/\b$key\b/", " \$params['$key'] ", $equation); |
|
} |
|
} |
|
$smarty_math_result = null; |
|
eval("\$smarty_math_result = " . $equation . ";"); |
|
|
|
if (empty($params[ 'format' ])) { |
|
if (empty($params[ 'assign' ])) { |
|
return $smarty_math_result; |
|
} else { |
|
$smarty->assign($params[ 'assign' ], $smarty_math_result); |
|
} |
|
} else { |
|
if (empty($params[ 'assign' ])) { |
|
printf($params[ 'format' ], $smarty_math_result); |
|
} else { |
|
$smarty->assign($params[ 'assign' ], sprintf($params[ 'format' ], $smarty_math_result)); |
|
} |
|
} |
|
}
|
|
|