| 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | * Performs safe variable parsing based on types which can be used by |
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| 5 | * users. This may not be able to represent all possible data inputs, |
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| 6 | * however. |
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| 7 | */ |
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| 8 | class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser |
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| 9 | { |
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| 10 | |
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| 11 | protected function parseImplementation($var, $type, $allow_null) { |
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| 12 | if ($allow_null && $var === null) return null; |
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| 13 | switch ($type) { |
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| 14 | // Note: if code "breaks" from the switch, it triggers a generic |
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| 15 | // exception to be thrown. Specific errors can be specifically |
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| 16 | // done here. |
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| 17 | case 'mixed': |
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| 18 | case 'istring': |
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| 19 | case 'string': |
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| 20 | case 'text': |
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| 21 | case 'itext': |
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| 22 | return $var; |
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| 23 | case 'int': |
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| 24 | if (is_string($var) && ctype_digit($var)) $var = (int) $var; |
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| 25 | return $var; |
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| 26 | case 'float': |
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| 27 | if ((is_string($var) && is_numeric($var)) || is_int($var)) $var = (float) $var; |
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| 28 | return $var; |
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| 29 | case 'bool': |
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| 30 | if (is_int($var) && ($var === 0 || $var === 1)) { |
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| 31 | $var = (bool) $var; |
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| 32 | } elseif (is_string($var)) { |
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| 33 | if ($var == 'on' || $var == 'true' || $var == '1') { |
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| 34 | $var = true; |
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| 35 | } elseif ($var == 'off' || $var == 'false' || $var == '0') { |
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| 36 | $var = false; |
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| 37 | } else { |
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| 38 | throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type"); |
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| 39 | } |
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| 40 | } |
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| 41 | return $var; |
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| 42 | case 'list': |
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| 43 | case 'hash': |
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| 44 | case 'lookup': |
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| 45 | if (is_string($var)) { |
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| 46 | // special case: technically, this is an array with |
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| 47 | // a single empty string item, but having an empty |
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| 48 | // array is more intuitive |
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| 49 | if ($var == '') return array(); |
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| 50 | if (strpos($var, "\n") === false && strpos($var, "\r") === false) { |
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| 51 | // simplistic string to array method that only works |
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| 52 | // for simple lists of tag names or alphanumeric characters |
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| 53 | $var = explode(',',$var); |
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| 54 | } else { |
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| 55 | $var = preg_split('/(,|[\n\r]+)/', $var); |
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| 56 | } |
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| 57 | // remove spaces |
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| 58 | foreach ($var as $i => $j) $var[$i] = trim($j); |
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| 59 | if ($type === 'hash') { |
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| 60 | // key:value,key2:value2 |
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| 61 | $nvar = array(); |
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| 62 | foreach ($var as $keypair) { |
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| 63 | $c = explode(':', $keypair, 2); |
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| 64 | if (!isset($c[1])) continue; |
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| 65 | $nvar[$c[0]] = $c[1]; |
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| 66 | } |
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| 67 | $var = $nvar; |
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| 68 | } |
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| 69 | } |
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| 70 | if (!is_array($var)) break; |
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| 71 | $keys = array_keys($var); |
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| 72 | if ($keys === array_keys($keys)) { |
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| 73 | if ($type == 'list') return $var; |
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| 74 | elseif ($type == 'lookup') { |
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| 75 | $new = array(); |
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| 76 | foreach ($var as $key) { |
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| 77 | $new[$key] = true; |
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| 78 | } |
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| 79 | return $new; |
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| 80 | } else break; |
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| 81 | } |
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| 82 | if ($type === 'lookup') { |
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| 83 | foreach ($var as $key => $value) { |
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| 84 | $var[$key] = true; |
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| 85 | } |
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| 86 | } |
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| 87 | return $var; |
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| 88 | default: |
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| 89 | $this->errorInconsistent(__CLASS__, $type); |
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| 90 | } |
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| 91 | $this->errorGeneric($var, $type); |
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| 92 | } |
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| 93 | |
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| 94 | } |
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