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Редакция 2 | Редакция 3 | ||
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1 | <?php
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1 | <?php
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2 | /**
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2 | /**
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3 | * Smarty plugin
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3 | * Smarty plugin
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4 | * @package Smarty
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4 | * @package Smarty
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5 | * @subpackage plugins
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5 | * @subpackage plugins
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6 | */
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6 | */
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7 | 7 | ||
8 | 8 | ||
9 | /**
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9 | /**
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10 | * Smarty {math} function plugin
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10 | * Smarty {math} function plugin
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11 | *
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11 | *
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12 | * Type: function<br>
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12 | * Type: function<br>
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13 | * Name: math<br>
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13 | * Name: math<br>
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14 | * Purpose: handle math computations in template<br>
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14 | * Purpose: handle math computations in template<br>
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15 | * @link http://smarty.php.net/manual/en/language.function.math.php {math}
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15 | * @link http://smarty.php.net/manual/en/language.function.math.php {math}
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16 | * (Smarty online manual)
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16 | * (Smarty online manual)
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17 | * @author Monte Ohrt <monte at ohrt dot com>
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17 | * @author Monte Ohrt <monte at ohrt dot com>
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18 | * @param array
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18 | * @param array
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19 | * @param Smarty
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19 | * @param Smarty
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20 | * @return string
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20 | * @return string
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21 | */
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21 | */
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22 | function smarty_function_math($params, &$smarty) |
22 | function smarty_function_math($params, &$smarty) |
23 | {
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23 | {
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24 | // be sure equation parameter is present
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24 | // be sure equation parameter is present
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25 | if (empty($params['equation'])) { |
25 | if (empty($params['equation'])) { |
26 | $smarty->trigger_error("math: missing equation parameter"); |
26 | $smarty->trigger_error("math: missing equation parameter"); |
27 | return; |
27 | return; |
28 | }
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28 | }
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29 | 29 | ||
30 | $equation = $params['equation']; |
30 | $equation = $params['equation']; |
31 | 31 | ||
32 | // make sure parenthesis are balanced
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32 | // make sure parenthesis are balanced
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33 | if (substr_count($equation,"(") != substr_count($equation,")")) { |
33 | if (substr_count($equation,"(") != substr_count($equation,")")) { |
34 | $smarty->trigger_error("math: unbalanced parenthesis"); |
34 | $smarty->trigger_error("math: unbalanced parenthesis"); |
35 | return; |
35 | return; |
36 | }
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36 | }
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37 | 37 | ||
38 | // match all vars in equation, make sure all are passed
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38 | // match all vars in equation, make sure all are passed
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39 | preg_match_all("!(?:0x[a-fA-F0-9]+)|([a-zA-Z][a-zA-Z0-9_]+)!",$equation, $match); |
39 | preg_match_all("!(?:0x[a-fA-F0-9]+)|([a-zA-Z][a-zA-Z0-9_]+)!",$equation, $match); |
40 | $allowed_funcs = array('int','abs','ceil','cos','exp','floor','log','log10', |
40 | $allowed_funcs = array('int','abs','ceil','cos','exp','floor','log','log10', |
41 | 'max','min','pi','pow','rand','round','sin','sqrt','srand','tan'); |
41 | 'max','min','pi','pow','rand','round','sin','sqrt','srand','tan'); |
42 | 42 | ||
43 | foreach($match[1] as $curr_var) { |
43 | foreach($match[1] as $curr_var) { |
44 | if ($curr_var && !in_array($curr_var, array_keys($params)) && !in_array($curr_var, $allowed_funcs)) { |
44 | if ($curr_var && !in_array($curr_var, array_keys($params)) && !in_array($curr_var, $allowed_funcs)) { |
45 | $smarty->trigger_error("math: function call $curr_var not allowed"); |
45 | $smarty->trigger_error("math: function call $curr_var not allowed"); |
46 | return; |
46 | return; |
47 | }
|
47 | }
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48 | }
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48 | }
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49 | 49 | ||
50 | foreach($params as $key => $val) { |
50 | foreach($params as $key => $val) { |
51 | if ($key != "equation" && $key != "format" && $key != "assign") { |
51 | if ($key != "equation" && $key != "format" && $key != "assign") { |
52 | // make sure value is not empty
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52 | // make sure value is not empty
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53 | if (strlen($val)==0) { |
53 | if (strlen($val)==0) { |
54 | $smarty->trigger_error("math: parameter $key is empty"); |
54 | $smarty->trigger_error("math: parameter $key is empty"); |
55 | return; |
55 | return; |
56 | }
|
56 | }
|
57 | if (!is_numeric($val)) { |
57 | if (!is_numeric($val)) { |
58 | $smarty->trigger_error("math: parameter $key: is not numeric"); |
58 | $smarty->trigger_error("math: parameter $key: is not numeric"); |
59 | return; |
59 | return; |
60 | }
|
60 | }
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61 | $equation = preg_replace("/\b$key\b/", " \$params['$key'] ", $equation); |
61 | $equation = preg_replace("/\b$key\b/", " \$params['$key'] ", $equation); |
62 | }
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62 | }
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63 | }
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63 | }
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64 | 64 | ||
65 | eval("\$smarty_math_result = ".$equation.";"); |
65 | eval("\$smarty_math_result = ".$equation.";"); |
66 | 66 | ||
67 | if (empty($params['format'])) { |
67 | if (empty($params['format'])) { |
68 | if (empty($params['assign'])) { |
68 | if (empty($params['assign'])) { |
69 | return $smarty_math_result; |
69 | return $smarty_math_result; |
70 | } else { |
70 | } else { |
71 | $smarty->assign($params['assign'],$smarty_math_result); |
71 | $smarty->assign($params['assign'],$smarty_math_result); |
72 | }
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72 | }
|
73 | } else { |
73 | } else { |
74 | if (empty($params['assign'])){ |
74 | if (empty($params['assign'])){ |
75 | printf($params['format'],$smarty_math_result); |
75 | printf($params['format'],$smarty_math_result); |
76 | } else { |
76 | } else { |
77 | $smarty->assign($params['assign'],sprintf($params['format'],$smarty_math_result)); |
77 | $smarty->assign($params['assign'],sprintf($params['format'],$smarty_math_result)); |
78 | }
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78 | }
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79 | }
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79 | }
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80 | }
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80 | }
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81 | 81 | ||
82 | /* vim: set expandtab: */
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82 | /* vim: set expandtab: */
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83 | 83 | ||
84 | ?>
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84 | ?>
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85 | 85 |