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1 <?php 2 3 /** 4 * Performs safe variable parsing based on types which can be used by 5 * users. This may not be able to represent all possible data inputs, 6 * however. 7 */ 8 class HTMLPurifier_VarParser_Flexible extends HTMLPurifier_VarParser 9 { 10 /** 11 * @param mixed $var 12 * @param int $type 13 * @param bool $allow_null 14 * @return array|bool|float|int|mixed|null|string 15 * @throws HTMLPurifier_VarParserException 16 */ 17 protected function parseImplementation($var, $type, $allow_null) 18 { 19 if ($allow_null && $var === null) { 20 return null; 21 } 22 switch ($type) { 23 // Note: if code "breaks" from the switch, it triggers a generic 24 // exception to be thrown. Specific errors can be specifically 25 // done here. 26 case self::C_MIXED: 27 case self::ISTRING: 28 case self::C_STRING: 29 case self::TEXT: 30 case self::ITEXT: 31 return $var; 32 case self::C_INT: 33 if (is_string($var) && ctype_digit($var)) { 34 $var = (int)$var; 35 } 36 return $var; 37 case self::C_FLOAT: 38 if ((is_string($var) && is_numeric($var)) || is_int($var)) { 39 $var = (float)$var; 40 } 41 return $var; 42 case self::C_BOOL: 43 if (is_int($var) && ($var === 0 || $var === 1)) { 44 $var = (bool)$var; 45 } elseif (is_string($var)) { 46 if ($var == 'on' || $var == 'true' || $var == '1') { 47 $var = true; 48 } elseif ($var == 'off' || $var == 'false' || $var == '0') { 49 $var = false; 50 } else { 51 throw new HTMLPurifier_VarParserException("Unrecognized value '$var' for $type"); 52 } 53 } 54 return $var; 55 case self::ALIST: 56 case self::HASH: 57 case self::LOOKUP: 58 if (is_string($var)) { 59 // special case: technically, this is an array with 60 // a single empty string item, but having an empty 61 // array is more intuitive 62 if ($var == '') { 63 return array(); 64 } 65 if (strpos($var, "\n") === false && strpos($var, "\r") === false) { 66 // simplistic string to array method that only works 67 // for simple lists of tag names or alphanumeric characters 68 $var = explode(',', $var); 69 } else { 70 $var = preg_split('/(,|[\n\r]+)/', $var); 71 } 72 // remove spaces 73 foreach ($var as $i => $j) { 74 $var[$i] = trim($j); 75 } 76 if ($type === self::HASH) { 77 // key:value,key2:value2 78 $nvar = array(); 79 foreach ($var as $keypair) { 80 $c = explode(':', $keypair, 2); 81 if (!isset($c[1])) { 82 continue; 83 } 84 $nvar[trim($c[0])] = trim($c[1]); 85 } 86 $var = $nvar; 87 } 88 } 89 if (!is_array($var)) { 90 break; 91 } 92 $keys = array_keys($var); 93 if ($keys === array_keys($keys)) { 94 if ($type == self::ALIST) { 95 return $var; 96 } elseif ($type == self::LOOKUP) { 97 $new = array(); 98 foreach ($var as $key) { 99 $new[$key] = true; 100 } 101 return $new; 102 } else { 103 break; 104 } 105 } 106 if ($type === self::ALIST) { 107 trigger_error("Array list did not have consecutive integer indexes", E_USER_WARNING); 108 return array_values($var); 109 } 110 if ($type === self::LOOKUP) { 111 foreach ($var as $key => $value) { 112 if ($value !== true) { 113 trigger_error( 114 "Lookup array has non-true value at key '$key'; " . 115 "maybe your input array was not indexed numerically", 116 E_USER_WARNING 117 ); 118 } 119 $var[$key] = true; 120 } 121 } 122 return $var; 123 default: 124 $this->errorInconsistent(__CLASS__, $type); 125 } 126 $this->errorGeneric($var, $type); 127 } 128 } 129 130 // vim: et sw=4 sts=4
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