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File: web-app/lib/SMARTY/plugins/function.math.php

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  Classes of davifelipe  >  smart MVC  >  web-app/lib/SMARTY/plugins/function.math.php  >  Download  
File: web-app/lib/SMARTY/plugins/function.math.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: smart MVC
MVC framework using Smarty to render views
Author: By
Last change:
Date: 2 years ago
Size: 2,650 bytes
 

Contents

Class file image Download
<?php
/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 */


/**
 * Smarty {math} function plugin
 *
 * Type:     function<br>
 * Name:     math<br>
 * Purpose:  handle math computations in template<br>
 * @link http://smarty.php.net/manual/en/language.function.math.php {math}
 *          (Smarty online manual)
 * @author   Monte Ohrt <monte at ohrt dot com>
 * @param array
 * @param Smarty
 * @return string
 */
function smarty_function_math($params, &$smarty)
{
    
// be sure equation parameter is present
    
if (empty($params['equation'])) {
        
$smarty->trigger_error("math: missing equation parameter");
        return;
    }

    
// strip out backticks, not necessary for math
    
$equation str_replace('`','',$params['equation']);

    
// make sure parenthesis are balanced
    
if (substr_count($equation,"(") != substr_count($equation,")")) {
        
$smarty->trigger_error("math: unbalanced parenthesis");
        return;
    }

    
// match all vars in equation, make sure all are passed
    
preg_match_all("!(?:0x[a-fA-F0-9]+)|([a-zA-Z][a-zA-Z0-9_]+)!",$equation$match);
    
$allowed_funcs = array('int','abs','ceil','cos','exp','floor','log','log10',
                           
'max','min','pi','pow','rand','round','sin','sqrt','srand','tan');
    
    foreach(
$match[1] as $curr_var) {
        if (
$curr_var && !in_array($curr_vararray_keys($params)) && !in_array($curr_var$allowed_funcs)) {
            
$smarty->trigger_error("math: function call $curr_var not allowed");
            return;
        }
    }

    foreach(
$params as $key => $val) {
        if (
$key != "equation" && $key != "format" && $key != "assign") {
            
// make sure value is not empty
            
if (strlen($val)==0) {
                
$smarty->trigger_error("math: parameter $key is empty");
                return;
            }
            if (!
is_numeric($val)) {
                
$smarty->trigger_error("math: parameter $key: is not numeric");
                return;
            }
            
$equation preg_replace("/\b$key\b/"" \$params['$key'] "$equation);
        }
    }

    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));
        }
    }
}

/* vim: set expandtab: */

?>