XOOPS 2.5.6  Final
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EntityParser.php
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1 <?php
2 
3 // if want to implement error collecting here, we'll need to use some sort
4 // of global data (probably trigger_error) because it's impossible to pass
5 // $config or $context to the callback functions.
6 
11 {
12 
16  protected $_entity_lookup;
17 
22 '/&(?:[#]x([a-fA-F0-9]+)|[#]0*(\d+)|([A-Za-z_:][A-Za-z0-9.\-_:]*));?/';
23 // 1. hex 2. dec 3. string (XML style)
24 
25 
29  protected $_special_dec2str =
30  array(
31  34 => '"',
32  38 => '&',
33  39 => "'",
34  60 => '<',
35  62 => '>'
36  );
37 
41  protected $_special_ent2dec =
42  array(
43  'quot' => 34,
44  'amp' => 38,
45  'lt' => 60,
46  'gt' => 62
47  );
48 
57  public function substituteNonSpecialEntities($string) {
58  // it will try to detect missing semicolons, but don't rely on it
59  return preg_replace_callback(
60  $this->_substituteEntitiesRegex,
61  array($this, 'nonSpecialEntityCallback'),
62  $string
63  );
64  }
65 
75  protected function nonSpecialEntityCallback($matches) {
76  // replaces all but big five
77  $entity = $matches[0];
78  $is_num = (@$matches[0][1] === '#');
79  if ($is_num) {
80  $is_hex = (@$entity[2] === 'x');
81  $code = $is_hex ? hexdec($matches[1]) : (int) $matches[2];
82 
83  // abort for special characters
84  if (isset($this->_special_dec2str[$code])) return $entity;
85 
86  return HTMLPurifier_Encoder::unichr($code);
87  } else {
88  if (isset($this->_special_ent2dec[$matches[3]])) return $entity;
89  if (!$this->_entity_lookup) {
90  $this->_entity_lookup = HTMLPurifier_EntityLookup::instance();
91  }
92  if (isset($this->_entity_lookup->table[$matches[3]])) {
93  return $this->_entity_lookup->table[$matches[3]];
94  } else {
95  return $entity;
96  }
97  }
98  }
99 
109  public function substituteSpecialEntities($string) {
110  return preg_replace_callback(
111  $this->_substituteEntitiesRegex,
112  array($this, 'specialEntityCallback'),
113  $string);
114  }
115 
126  protected function specialEntityCallback($matches) {
127  $entity = $matches[0];
128  $is_num = (@$matches[0][1] === '#');
129  if ($is_num) {
130  $is_hex = (@$entity[2] === 'x');
131  $int = $is_hex ? hexdec($matches[1]) : (int) $matches[2];
132  return isset($this->_special_dec2str[$int]) ?
133  $this->_special_dec2str[$int] :
134  $entity;
135  } else {
136  return isset($this->_special_ent2dec[$matches[3]]) ?
137  $this->_special_ent2dec[$matches[3]] :
138  $entity;
139  }
140  }
141 
142 }
143 
144 // vim: et sw=4 sts=4