1 | <?php |
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22 | final class RegexHelper |
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23 | { |
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24 | /** @deprecated Use PARTIAL_ESCAPABLE instead */ |
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25 | const ESCAPABLE = 0; |
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26 | |||
27 | /** @deprecated Use PARTIAL_ESCAPED_CHAR instead */ |
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28 | const ESCAPED_CHAR = 1; |
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29 | |||
30 | /** @deprecated Use PARTIAL_IN_DOUBLE_QUOTES instead */ |
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31 | const IN_DOUBLE_QUOTES = 2; |
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32 | |||
33 | /** @deprecated Use PARTIAL_IN_SINGLE_QUOTES instead */ |
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34 | const IN_SINGLE_QUOTES = 3; |
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35 | |||
36 | /** @deprecated Use PARTIAL_IN_PARENS instead */ |
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37 | const IN_PARENS = 4; |
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38 | |||
39 | /** @deprecated Use PARTIAL_REG_CHAR instead */ |
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40 | const REG_CHAR = 5; |
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41 | |||
42 | /** @deprecated Use PARTIAL_IN_PARENS_NOSP instead */ |
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43 | const IN_PARENS_NOSP = 6; |
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44 | |||
45 | /** @deprecated Use PARTIAL_TAGNAME instead */ |
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46 | const TAGNAME = 7; |
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47 | |||
48 | /** @deprecated Use PARTIAL_BLOCKTAGNAME instead */ |
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49 | const BLOCKTAGNAME = 8; |
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50 | |||
51 | /** @deprecated Use PARTIAL_ATTRIBUTENAME instead */ |
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52 | const ATTRIBUTENAME = 9; |
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53 | |||
54 | /** @deprecated Use PARTIAL_UNQUOTEDVALUE instead */ |
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55 | const UNQUOTEDVALUE = 10; |
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56 | |||
57 | /** @deprecated Use PARTIAL_SINGLEQUOTEDVALUE instead */ |
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58 | const SINGLEQUOTEDVALUE = 11; |
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59 | |||
60 | /** @deprecated Use PARTIAL_DOUBLEQUOTEDVALUE instead */ |
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61 | const DOUBLEQUOTEDVALUE = 12; |
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62 | |||
63 | /** @deprecated Use PARTIAL_ATTRIBUTEVALUE instead */ |
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64 | const ATTRIBUTEVALUE = 13; |
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65 | |||
66 | /** @deprecated Use PARTIAL_ATTRIBUTEVALUESPEC instead */ |
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67 | const ATTRIBUTEVALUESPEC = 14; |
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68 | |||
69 | /** @deprecated Use PARTIAL_ATTRIBUTE instead */ |
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70 | const ATTRIBUTE = 15; |
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71 | |||
72 | /** @deprecated Use PARTIAL_OPENTAG instead */ |
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73 | const OPENTAG = 16; |
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74 | |||
75 | /** @deprecated Use PARTIAL_CLOSETAG instead */ |
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76 | const CLOSETAG = 17; |
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77 | |||
78 | /** @deprecated Use PARTIAL_OPENBLOCKTAG instead */ |
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79 | const OPENBLOCKTAG = 18; |
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80 | |||
81 | /** @deprecated Use PARTIAL_CLOSEBLOCKTAG instead */ |
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82 | const CLOSEBLOCKTAG = 19; |
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83 | |||
84 | /** @deprecated Use PARTIAL_HTMLCOMMENT instead */ |
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85 | const HTMLCOMMENT = 20; |
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86 | |||
87 | /** @deprecated Use PARTIAL_PROCESSINGINSTRUCTION instead */ |
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88 | const PROCESSINGINSTRUCTION = 21; |
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89 | |||
90 | /** @deprecated Use PARTIAL_DECLARATION instead */ |
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91 | const DECLARATION = 22; |
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92 | |||
93 | /** @deprecated Use PARTIAL_CDATA instead */ |
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94 | const CDATA = 23; |
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95 | |||
96 | /** @deprecated Use PARTIAL_HTMLTAG instead */ |
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97 | const HTMLTAG = 24; |
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98 | |||
99 | /** @deprecated Use PARTIAL_HTMLBLOCKOPEN instead */ |
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100 | const HTMLBLOCKOPEN = 25; |
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101 | |||
102 | /** @deprecated Use PARTIAL_LINK_TITLE instead */ |
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103 | const LINK_TITLE = 26; |
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104 | |||
105 | // Partial regular expressions (wrap with `/` on each side before use) |
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106 | const PARTIAL_ENTITY = '&(?:#x[a-f0-9]{1,8}|#[0-9]{1,8}|[a-z][a-z0-9]{1,31});'; |
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107 | const PARTIAL_ESCAPABLE = '[!"#$%&\'()*+,.\/:;<=>?@[\\\\\]^_`{|}~-]'; |
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108 | const PARTIAL_ESCAPED_CHAR = '\\\\' . self::PARTIAL_ESCAPABLE; |
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109 | const PARTIAL_IN_DOUBLE_QUOTES = '"(' . self::PARTIAL_ESCAPED_CHAR . '|[^"\x00])*"'; |
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110 | const PARTIAL_IN_SINGLE_QUOTES = '\'(' . self::PARTIAL_ESCAPED_CHAR . '|[^\'\x00])*\''; |
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111 | const PARTIAL_IN_PARENS = '\\((' . self::PARTIAL_ESCAPED_CHAR . '|[^)\x00])*\\)'; |
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112 | const PARTIAL_REG_CHAR = '[^\\\\()\x00-\x20]'; |
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113 | const PARTIAL_IN_PARENS_NOSP = '\((' . self::PARTIAL_REG_CHAR . '|' . self::PARTIAL_ESCAPED_CHAR . '|\\\\)*\)'; |
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114 | const PARTIAL_TAGNAME = '[A-Za-z][A-Za-z0-9-]*'; |
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115 | const PARTIAL_BLOCKTAGNAME = '(?:address|article|aside|base|basefont|blockquote|body|caption|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption|figure|footer|form|frame|frameset|h1|head|header|hr|html|iframe|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option|p|param|section|source|title|summary|table|tbody|td|tfoot|th|thead|title|tr|track|ul)'; |
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116 | const PARTIAL_ATTRIBUTENAME = '[a-zA-Z_:][a-zA-Z0-9:._-]*'; |
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117 | const PARTIAL_UNQUOTEDVALUE = '[^"\'=<>`\x00-\x20]+'; |
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118 | const PARTIAL_SINGLEQUOTEDVALUE = '\'[^\']*\''; |
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119 | const PARTIAL_DOUBLEQUOTEDVALUE = '"[^"]*"'; |
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120 | const PARTIAL_ATTRIBUTEVALUE = '(?:' . self::PARTIAL_UNQUOTEDVALUE . '|' . self::PARTIAL_SINGLEQUOTEDVALUE . '|' . self::PARTIAL_DOUBLEQUOTEDVALUE . ')'; |
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121 | const PARTIAL_ATTRIBUTEVALUESPEC = '(?:' . '\s*=' . '\s*' . self::PARTIAL_ATTRIBUTEVALUE . ')'; |
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122 | const PARTIAL_ATTRIBUTE = '(?:' . '\s+' . self::PARTIAL_ATTRIBUTENAME . self::PARTIAL_ATTRIBUTEVALUESPEC . '?)'; |
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123 | const PARTIAL_OPENTAG = '<' . self::PARTIAL_TAGNAME . self::PARTIAL_ATTRIBUTE . '*' . '\s*\/?>'; |
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124 | const PARTIAL_CLOSETAG = '<\/' . self::PARTIAL_TAGNAME . '\s*[>]'; |
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125 | const PARTIAL_OPENBLOCKTAG = '<' . self::PARTIAL_BLOCKTAGNAME . self::PARTIAL_ATTRIBUTE . '*' . '\s*\/?>'; |
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126 | const PARTIAL_CLOSEBLOCKTAG = '<\/' . self::PARTIAL_BLOCKTAGNAME . '\s*[>]'; |
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127 | const PARTIAL_HTMLCOMMENT = '<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->'; |
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128 | const PARTIAL_PROCESSINGINSTRUCTION = '[<][?].*?[?][>]'; |
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129 | const PARTIAL_DECLARATION = '<![A-Z]+' . '\s+[^>]*>'; |
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130 | const PARTIAL_CDATA = '<!\[CDATA\[[\s\S]*?]\]>'; |
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131 | const PARTIAL_HTMLTAG = '(?:' . self::PARTIAL_OPENTAG . '|' . self::PARTIAL_CLOSETAG . '|' . self::PARTIAL_HTMLCOMMENT . '|' . |
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132 | self::PARTIAL_PROCESSINGINSTRUCTION . '|' . self::PARTIAL_DECLARATION . '|' . self::PARTIAL_CDATA . ')'; |
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133 | const PARTIAL_HTMLBLOCKOPEN = '<(?:' . self::PARTIAL_BLOCKTAGNAME . '(?:[\s\/>]|$)' . '|' . |
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134 | '\/' . self::PARTIAL_BLOCKTAGNAME . '(?:[\s>]|$)' . '|' . '[?!])'; |
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135 | const PARTIAL_LINK_TITLE = '^(?:"(' . self::PARTIAL_ESCAPED_CHAR . '|[^"\x00])*"' . |
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136 | '|' . '\'(' . self::PARTIAL_ESCAPED_CHAR . '|[^\'\x00])*\'' . |
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137 | '|' . '\((' . self::PARTIAL_ESCAPED_CHAR . '|[^)\x00])*\))'; |
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138 | |||
139 | /** @deprecated Use PARTIAL_ESCAPABLE instead */ |
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140 | const REGEX_ESCAPABLE = self::PARTIAL_ESCAPABLE; |
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141 | |||
142 | /** @deprecated Use PARTIAL_ENTITY instead */ |
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143 | const REGEX_ENTITY = self::PARTIAL_ENTITY; |
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144 | |||
145 | const REGEX_PUNCTUATION = '/^[\x{2000}-\x{206F}\x{2E00}-\x{2E7F}\p{Pc}\p{Pd}\p{Pe}\p{Pf}\p{Pi}\p{Po}\p{Ps}\\\\\'!"#\$%&\(\)\*\+,\-\.\\/:;<=>\?@\[\]\^_`\{\|\}~]/u'; |
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146 | const REGEX_UNSAFE_PROTOCOL = '/^javascript:|vbscript:|file:|data:/i'; |
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147 | const REGEX_SAFE_DATA_PROTOCOL = '/^data:image\/(?:png|gif|jpeg|webp)/i'; |
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148 | const REGEX_NON_SPACE = '/[^ \t\f\v\r\n]/'; |
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149 | |||
150 | const REGEX_WHITESPACE_CHAR = '/^[ \t\n\x0b\x0c\x0d]/'; |
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151 | const REGEX_WHITESPACE = '/[ \t\n\x0b\x0c\x0d]+/'; |
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152 | const REGEX_UNICODE_WHITESPACE_CHAR = '/^\pZ|\s/u'; |
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153 | const REGEX_THEMATIC_BREAK = '/^(?:(?:\*[ \t]*){3,}|(?:_[ \t]*){3,}|(?:-[ \t]*){3,})[ \t]*$/'; |
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154 | const REGEX_LINK_DESTINATION_BRACES = '/^(?:' . '[<](?:[^ <>\\t\\n\\\\\\x00]' . '|' . self::PARTIAL_ESCAPED_CHAR . '|' . '\\\\)*[>]' . ')/'; |
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155 | |||
156 | /** |
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157 | * @param string $character |
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158 | * |
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159 | * @return bool |
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160 | */ |
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161 | 96 | public static function isEscapable(string $character): bool |
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165 | |||
166 | /** |
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167 | * Attempt to match a regex in string s at offset offset |
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168 | * |
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169 | * @param string $regex |
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170 | * @param string $string |
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171 | * @param int $offset |
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172 | * |
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173 | * @return int|null Index of match, or null |
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174 | */ |
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175 | 1776 | public static function matchAt(string $regex, string $string, int $offset = 0): ?int |
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188 | |||
189 | /** |
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190 | * Functional wrapper around preg_match_all |
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191 | * |
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192 | * @param string $pattern |
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193 | * @param string $subject |
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194 | * @param int $offset |
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195 | * |
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196 | * @return array|null |
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197 | */ |
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198 | 1875 | public static function matchAll(string $pattern, string $subject, int $offset = 0): ?array |
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220 | |||
221 | /** |
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222 | * Replace backslash escapes with literal characters |
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223 | * |
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224 | * @param string $string |
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225 | * |
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226 | * @return string |
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227 | */ |
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228 | 498 | public static function unescape(string $string): string |
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239 | |||
240 | /** |
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241 | * @param int $type HTML block type |
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242 | * |
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243 | * @return string|null |
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244 | */ |
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245 | 279 | public static function getHtmlBlockOpenRegex(int $type): ?string |
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266 | |||
267 | /** |
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268 | * @param int $type HTML block type |
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269 | * |
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270 | * @return string|null |
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271 | */ |
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272 | 60 | public static function getHtmlBlockCloseRegex(int $type): ?string |
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289 | |||
290 | /** |
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291 | * @param string $url |
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292 | * |
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293 | * @return bool |
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294 | */ |
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295 | 33 | public static function isLinkPotentiallyUnsafe(string $url): bool |
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299 | } |
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300 |