[483] | 1 | <?php |
---|
| 2 | /* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */ |
---|
| 3 | |
---|
| 4 | /** |
---|
| 5 | * Converts to and from JSON format. |
---|
| 6 | * |
---|
| 7 | * JSON (JavaScript Object Notation) is a lightweight data-interchange |
---|
| 8 | * format. It is easy for humans to read and write. It is easy for machines |
---|
| 9 | * to parse and generate. It is based on a subset of the JavaScript |
---|
| 10 | * Programming Language, Standard ECMA-262 3rd Edition - December 1999. |
---|
| 11 | * This feature can also be found in Python. JSON is a text format that is |
---|
| 12 | * completely language independent but uses conventions that are familiar |
---|
| 13 | * to programmers of the C-family of languages, including C, C++, C#, Java, |
---|
| 14 | * JavaScript, Perl, TCL, and many others. These properties make JSON an |
---|
| 15 | * ideal data-interchange language. |
---|
| 16 | * |
---|
| 17 | * This package provides a simple encoder and decoder for JSON notation. It |
---|
| 18 | * is intended for use with client-side Javascript applications that make |
---|
| 19 | * use of HTTPRequest to perform server communication functions - data can |
---|
| 20 | * be encoded into JSON notation for use in a client-side javascript, or |
---|
| 21 | * decoded from incoming Javascript requests. JSON format is native to |
---|
| 22 | * Javascript, and can be directly eval()'ed with no further parsing |
---|
| 23 | * overhead |
---|
| 24 | * |
---|
| 25 | * All strings should be in ASCII or UTF-8 format! |
---|
| 26 | * |
---|
| 27 | * LICENSE: Redistribution and use in source and binary forms, with or |
---|
| 28 | * without modification, are permitted provided that the following |
---|
| 29 | * conditions are met: Redistributions of source code must retain the |
---|
| 30 | * above copyright notice, this list of conditions and the following |
---|
| 31 | * disclaimer. Redistributions in binary form must reproduce the above |
---|
| 32 | * copyright notice, this list of conditions and the following disclaimer |
---|
| 33 | * in the documentation and/or other materials provided with the |
---|
| 34 | * distribution. |
---|
| 35 | * |
---|
| 36 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
---|
| 37 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
---|
| 38 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
---|
| 39 | * NO EVENT SHALL CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
---|
| 40 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
---|
| 41 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
---|
| 42 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
---|
| 43 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
---|
| 44 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE |
---|
| 45 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
---|
| 46 | * DAMAGE. |
---|
| 47 | * |
---|
| 48 | * @category |
---|
| 49 | * @package Services_JSON |
---|
| 50 | * @author Michal Migurski <mike-json@teczno.com> |
---|
| 51 | * @author Matt Knapp <mdknapp[at]gmail[dot]com> |
---|
| 52 | * @author Brett Stimmerman <brettstimmerman[at]gmail[dot]com> |
---|
| 53 | * @copyright 2005 Michal Migurski |
---|
| 54 | * @license http://www.opensource.org/licenses/bsd-license.php |
---|
| 55 | * @link http://pear.php.net/pepr/pepr-proposal-show.php?id=198 |
---|
| 56 | */ |
---|
| 57 | |
---|
| 58 | /** |
---|
| 59 | * Marker constant for Services_JSON::decode(), used to flag stack state |
---|
| 60 | */ |
---|
| 61 | define('SERVICES_JSON_SLICE', 1); |
---|
| 62 | |
---|
| 63 | /** |
---|
| 64 | * Marker constant for Services_JSON::decode(), used to flag stack state |
---|
| 65 | */ |
---|
| 66 | define('SERVICES_JSON_IN_STR', 2); |
---|
| 67 | |
---|
| 68 | /** |
---|
| 69 | * Marker constant for Services_JSON::decode(), used to flag stack state |
---|
| 70 | */ |
---|
| 71 | define('SERVICES_JSON_IN_ARR', 4); |
---|
| 72 | |
---|
| 73 | /** |
---|
| 74 | * Marker constant for Services_JSON::decode(), used to flag stack state |
---|
| 75 | */ |
---|
| 76 | define('SERVICES_JSON_IN_OBJ', 8); |
---|
| 77 | |
---|
| 78 | /** |
---|
| 79 | * Marker constant for Services_JSON::decode(), used to flag stack state |
---|
| 80 | */ |
---|
| 81 | define('SERVICES_JSON_IN_CMT', 16); |
---|
| 82 | |
---|
| 83 | /** |
---|
| 84 | * Behavior switch for Services_JSON::decode() |
---|
| 85 | */ |
---|
| 86 | define('SERVICES_JSON_LOOSE_TYPE', 10); |
---|
| 87 | |
---|
| 88 | /** |
---|
| 89 | * Behavior switch for Services_JSON::decode() |
---|
| 90 | */ |
---|
| 91 | define('SERVICES_JSON_STRICT_TYPE', 11); |
---|
| 92 | |
---|
| 93 | /** |
---|
| 94 | * Converts to and from JSON format. |
---|
| 95 | * |
---|
| 96 | * Brief example of use: |
---|
| 97 | * |
---|
| 98 | * <code> |
---|
| 99 | * // create a new instance of Services_JSON |
---|
| 100 | * $json = new Services_JSON(); |
---|
| 101 | * |
---|
| 102 | * // convert a complexe value to JSON notation, and send it to the browser |
---|
| 103 | * $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4))); |
---|
| 104 | * $output = $json->encode($value); |
---|
| 105 | * |
---|
| 106 | * print($output); |
---|
| 107 | * // prints: ["foo","bar",[1,2,"baz"],[3,[4]]] |
---|
| 108 | * |
---|
| 109 | * // accept incoming POST data, assumed to be in JSON notation |
---|
| 110 | * $input = file_get_contents('php://input', 1000000); |
---|
| 111 | * $value = $json->decode($input); |
---|
| 112 | * </code> |
---|
| 113 | */ |
---|
| 114 | class Services_JSON |
---|
| 115 | { |
---|
| 116 | /** |
---|
| 117 | * constructs a new JSON instance |
---|
| 118 | * |
---|
| 119 | * @param int $use object behavior: when encoding or decoding, |
---|
| 120 | * be loose or strict about object/array usage |
---|
| 121 | * |
---|
| 122 | * possible values: |
---|
| 123 | * - SERVICES_JSON_STRICT_TYPE: strict typing, default. |
---|
| 124 | * "{...}" syntax creates objects in decode(). |
---|
| 125 | * - SERVICES_JSON_LOOSE_TYPE: loose typing. |
---|
| 126 | * "{...}" syntax creates associative arrays in decode(). |
---|
| 127 | */ |
---|
| 128 | function Services_JSON($use = SERVICES_JSON_STRICT_TYPE) |
---|
| 129 | { |
---|
| 130 | $this->use = $use; |
---|
| 131 | } |
---|
| 132 | |
---|
| 133 | /** |
---|
| 134 | * convert a string from one UTF-16 char to one UTF-8 char |
---|
| 135 | * |
---|
| 136 | * Normally should be handled by mb_convert_encoding, but |
---|
| 137 | * provides a slower PHP-only method for installations |
---|
| 138 | * that lack the multibye string extension. |
---|
| 139 | * |
---|
| 140 | * @param string $utf16 UTF-16 character |
---|
| 141 | * @return string UTF-8 character |
---|
| 142 | * @access private |
---|
| 143 | */ |
---|
| 144 | function utf162utf8($utf16) |
---|
| 145 | { |
---|
| 146 | // oh please oh please oh please oh please oh please |
---|
| 147 | if(function_exists('mb_convert_encoding')) |
---|
| 148 | return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16'); |
---|
| 149 | |
---|
| 150 | $bytes = (ord($utf16{0}) << 8) | ord($utf16{1}); |
---|
| 151 | |
---|
| 152 | switch(true) { |
---|
| 153 | case ((0x7F & $bytes) == $bytes): |
---|
| 154 | // this case should never be reached, because we are in ASCII range |
---|
| 155 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 156 | return chr(0x7F & $bytes); |
---|
| 157 | |
---|
| 158 | case (0x07FF & $bytes) == $bytes: |
---|
| 159 | // return a 2-byte UTF-8 character |
---|
| 160 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 161 | return chr(0xC0 | (($bytes >> 6) & 0x1F)) |
---|
| 162 | . chr(0x80 | ($bytes & 0x3F)); |
---|
| 163 | |
---|
| 164 | case (0xFFFF & $bytes) == $bytes: |
---|
| 165 | // return a 3-byte UTF-8 character |
---|
| 166 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 167 | return chr(0xE0 | (($bytes >> 12) & 0x0F)) |
---|
| 168 | . chr(0x80 | (($bytes >> 6) & 0x3F)) |
---|
| 169 | . chr(0x80 | ($bytes & 0x3F)); |
---|
| 170 | } |
---|
| 171 | |
---|
| 172 | // ignoring UTF-32 for now, sorry |
---|
| 173 | return ''; |
---|
| 174 | } |
---|
| 175 | |
---|
| 176 | /** |
---|
| 177 | * convert a string from one UTF-8 char to one UTF-16 char |
---|
| 178 | * |
---|
| 179 | * Normally should be handled by mb_convert_encoding, but |
---|
| 180 | * provides a slower PHP-only method for installations |
---|
| 181 | * that lack the multibye string extension. |
---|
| 182 | * |
---|
| 183 | * @param string $utf8 UTF-8 character |
---|
| 184 | * @return string UTF-16 character |
---|
| 185 | * @access private |
---|
| 186 | */ |
---|
| 187 | function utf82utf16($utf8) |
---|
| 188 | { |
---|
| 189 | // oh please oh please oh please oh please oh please |
---|
| 190 | if(function_exists('mb_convert_encoding')) |
---|
| 191 | return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8'); |
---|
| 192 | |
---|
| 193 | switch(strlen($utf8)) { |
---|
| 194 | case 1: |
---|
| 195 | // this case should never be reached, because we are in ASCII range |
---|
| 196 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 197 | return $utf8; |
---|
| 198 | |
---|
| 199 | case 2: |
---|
| 200 | // return a UTF-16 character from a 2-byte UTF-8 char |
---|
| 201 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 202 | return chr(0x07 & (ord($utf8{0}) >> 2)) |
---|
| 203 | . chr((0xC0 & (ord($utf8{0}) << 6)) |
---|
| 204 | | (0x3F & ord($utf8{1}))); |
---|
| 205 | |
---|
| 206 | case 3: |
---|
| 207 | // return a UTF-16 character from a 3-byte UTF-8 char |
---|
| 208 | // see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 209 | return chr((0xF0 & (ord($utf8{0}) << 4)) |
---|
| 210 | | (0x0F & (ord($utf8{1}) >> 2))) |
---|
| 211 | . chr((0xC0 & (ord($utf8{1}) << 6)) |
---|
| 212 | | (0x7F & ord($utf8{2}))); |
---|
| 213 | } |
---|
| 214 | |
---|
| 215 | // ignoring UTF-32 for now, sorry |
---|
| 216 | return ''; |
---|
| 217 | } |
---|
| 218 | |
---|
| 219 | /** |
---|
| 220 | * encodes an arbitrary variable into JSON format |
---|
| 221 | * |
---|
| 222 | * @param mixed $var any number, boolean, string, array, or object to be encoded. |
---|
| 223 | * see argument 1 to Services_JSON() above for array-parsing behavior. |
---|
| 224 | * if var is a strng, note that encode() always expects it |
---|
| 225 | * to be in ASCII or UTF-8 format! |
---|
| 226 | * |
---|
| 227 | * @return string JSON string representation of input var |
---|
| 228 | * @access public |
---|
| 229 | */ |
---|
| 230 | function encode($var) |
---|
| 231 | { |
---|
| 232 | switch (gettype($var)) { |
---|
| 233 | case 'boolean': |
---|
| 234 | return $var ? 'true' : 'false'; |
---|
| 235 | |
---|
| 236 | case 'NULL': |
---|
| 237 | return 'null'; |
---|
| 238 | |
---|
| 239 | case 'integer': |
---|
| 240 | return (int) $var; |
---|
| 241 | |
---|
| 242 | case 'double': |
---|
| 243 | case 'float': |
---|
| 244 | return (float) $var; |
---|
| 245 | |
---|
| 246 | case 'string': |
---|
| 247 | // STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT |
---|
| 248 | $ascii = ''; |
---|
| 249 | $strlen_var = strlen($var); |
---|
| 250 | |
---|
| 251 | /* |
---|
| 252 | * Iterate over every character in the string, |
---|
| 253 | * escaping with a slash or encoding to UTF-8 where necessary |
---|
| 254 | */ |
---|
| 255 | for ($c = 0; $c < $strlen_var; ++$c) { |
---|
| 256 | |
---|
| 257 | $ord_var_c = ord($var{$c}); |
---|
| 258 | |
---|
| 259 | switch (true) { |
---|
| 260 | case $ord_var_c == 0x08: |
---|
| 261 | $ascii .= '\b'; |
---|
| 262 | break; |
---|
| 263 | case $ord_var_c == 0x09: |
---|
| 264 | $ascii .= '\t'; |
---|
| 265 | break; |
---|
| 266 | case $ord_var_c == 0x0A: |
---|
| 267 | $ascii .= '\n'; |
---|
| 268 | break; |
---|
| 269 | case $ord_var_c == 0x0C: |
---|
| 270 | $ascii .= '\f'; |
---|
| 271 | break; |
---|
| 272 | case $ord_var_c == 0x0D: |
---|
| 273 | $ascii .= '\r'; |
---|
| 274 | break; |
---|
| 275 | |
---|
| 276 | case $ord_var_c == 0x22: |
---|
| 277 | case $ord_var_c == 0x2F: |
---|
| 278 | case $ord_var_c == 0x5C: |
---|
| 279 | // double quote, slash, slosh |
---|
| 280 | $ascii .= '\\'.$var{$c}; |
---|
| 281 | break; |
---|
| 282 | |
---|
| 283 | case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)): |
---|
| 284 | // characters U-00000000 - U-0000007F (same as ASCII) |
---|
| 285 | $ascii .= $var{$c}; |
---|
| 286 | break; |
---|
| 287 | |
---|
| 288 | case (($ord_var_c & 0xE0) == 0xC0): |
---|
| 289 | // characters U-00000080 - U-000007FF, mask 110XXXXX |
---|
| 290 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 291 | $char = pack('C*', $ord_var_c, ord($var{$c + 1})); |
---|
| 292 | $c += 1; |
---|
| 293 | $utf16 = $this->utf82utf16($char); |
---|
| 294 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
---|
| 295 | break; |
---|
| 296 | |
---|
| 297 | case (($ord_var_c & 0xF0) == 0xE0): |
---|
| 298 | // characters U-00000800 - U-0000FFFF, mask 1110XXXX |
---|
| 299 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 300 | $char = pack('C*', $ord_var_c, |
---|
| 301 | ord($var{$c + 1}), |
---|
| 302 | ord($var{$c + 2})); |
---|
| 303 | $c += 2; |
---|
| 304 | $utf16 = $this->utf82utf16($char); |
---|
| 305 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
---|
| 306 | break; |
---|
| 307 | |
---|
| 308 | case (($ord_var_c & 0xF8) == 0xF0): |
---|
| 309 | // characters U-00010000 - U-001FFFFF, mask 11110XXX |
---|
| 310 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 311 | $char = pack('C*', $ord_var_c, |
---|
| 312 | ord($var{$c + 1}), |
---|
| 313 | ord($var{$c + 2}), |
---|
| 314 | ord($var{$c + 3})); |
---|
| 315 | $c += 3; |
---|
| 316 | $utf16 = $this->utf82utf16($char); |
---|
| 317 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
---|
| 318 | break; |
---|
| 319 | |
---|
| 320 | case (($ord_var_c & 0xFC) == 0xF8): |
---|
| 321 | // characters U-00200000 - U-03FFFFFF, mask 111110XX |
---|
| 322 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 323 | $char = pack('C*', $ord_var_c, |
---|
| 324 | ord($var{$c + 1}), |
---|
| 325 | ord($var{$c + 2}), |
---|
| 326 | ord($var{$c + 3}), |
---|
| 327 | ord($var{$c + 4})); |
---|
| 328 | $c += 4; |
---|
| 329 | $utf16 = $this->utf82utf16($char); |
---|
| 330 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
---|
| 331 | break; |
---|
| 332 | |
---|
| 333 | case (($ord_var_c & 0xFE) == 0xFC): |
---|
| 334 | // characters U-04000000 - U-7FFFFFFF, mask 1111110X |
---|
| 335 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 336 | $char = pack('C*', $ord_var_c, |
---|
| 337 | ord($var{$c + 1}), |
---|
| 338 | ord($var{$c + 2}), |
---|
| 339 | ord($var{$c + 3}), |
---|
| 340 | ord($var{$c + 4}), |
---|
| 341 | ord($var{$c + 5})); |
---|
| 342 | $c += 5; |
---|
| 343 | $utf16 = $this->utf82utf16($char); |
---|
| 344 | $ascii .= sprintf('\u%04s', bin2hex($utf16)); |
---|
| 345 | break; |
---|
| 346 | } |
---|
| 347 | } |
---|
| 348 | |
---|
| 349 | return '"'.$ascii.'"'; |
---|
| 350 | |
---|
| 351 | case 'array': |
---|
| 352 | /* |
---|
| 353 | * As per JSON spec if any array key is not an integer |
---|
| 354 | * we must treat the the whole array as an object. We |
---|
| 355 | * also try to catch a sparsely populated associative |
---|
| 356 | * array with numeric keys here because some JS engines |
---|
| 357 | * will create an array with empty indexes up to |
---|
| 358 | * max_index which can cause memory issues and because |
---|
| 359 | * the keys, which may be relevant, will be remapped |
---|
| 360 | * otherwise. |
---|
| 361 | * |
---|
| 362 | * As per the ECMA and JSON specification an object may |
---|
| 363 | * have any string as a property. Unfortunately due to |
---|
| 364 | * a hole in the ECMA specification if the key is a |
---|
| 365 | * ECMA reserved word or starts with a digit the |
---|
| 366 | * parameter is only accessible using ECMAScript's |
---|
| 367 | * bracket notation. |
---|
| 368 | */ |
---|
| 369 | |
---|
| 370 | // treat as a JSON object |
---|
| 371 | if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) { |
---|
| 372 | return '{' . |
---|
| 373 | join(',', array_map(array($this, 'name_value'), |
---|
| 374 | array_keys($var), |
---|
| 375 | array_values($var))) |
---|
| 376 | . '}'; |
---|
| 377 | } |
---|
| 378 | |
---|
| 379 | // treat it like a regular array |
---|
| 380 | return '[' . join(',', array_map(array($this, 'encode'), $var)) . ']'; |
---|
| 381 | |
---|
| 382 | case 'object': |
---|
| 383 | $vars = get_object_vars($var); |
---|
| 384 | return '{' . |
---|
| 385 | join(',', array_map(array($this, 'name_value'), |
---|
| 386 | array_keys($vars), |
---|
| 387 | array_values($vars))) |
---|
| 388 | . '}'; |
---|
| 389 | |
---|
| 390 | default: |
---|
| 391 | return ''; |
---|
| 392 | } |
---|
| 393 | } |
---|
| 394 | |
---|
| 395 | /** |
---|
| 396 | * array-walking function for use in generating JSON-formatted name-value pairs |
---|
| 397 | * |
---|
| 398 | * @param string $name name of key to use |
---|
| 399 | * @param mixed $value reference to an array element to be encoded |
---|
| 400 | * |
---|
| 401 | * @return string JSON-formatted name-value pair, like '"name":value' |
---|
| 402 | * @access private |
---|
| 403 | */ |
---|
| 404 | function name_value($name, $value) |
---|
| 405 | { |
---|
| 406 | return $this->encode(strval($name)) . ':' . $this->encode($value); |
---|
| 407 | } |
---|
| 408 | |
---|
| 409 | /** |
---|
| 410 | * reduce a string by removing leading and trailing comments and whitespace |
---|
| 411 | * |
---|
| 412 | * @param $str string string value to strip of comments and whitespace |
---|
| 413 | * |
---|
| 414 | * @return string string value stripped of comments and whitespace |
---|
| 415 | * @access private |
---|
| 416 | */ |
---|
| 417 | function reduce_string($str) |
---|
| 418 | { |
---|
| 419 | $str = preg_replace(array( |
---|
| 420 | |
---|
| 421 | // eliminate single line comments in '// ...' form |
---|
| 422 | '#^\s*//(.+)$#m', |
---|
| 423 | |
---|
| 424 | // eliminate multi-line comments in '/* ... */' form, at start of string |
---|
| 425 | '#^\s*/\*(.+)\*/#Us', |
---|
| 426 | |
---|
| 427 | // eliminate multi-line comments in '/* ... */' form, at end of string |
---|
| 428 | '#/\*(.+)\*/\s*$#Us' |
---|
| 429 | |
---|
| 430 | ), '', $str); |
---|
| 431 | |
---|
| 432 | // eliminate extraneous space |
---|
| 433 | return trim($str); |
---|
| 434 | } |
---|
| 435 | |
---|
| 436 | /** |
---|
| 437 | * decodes a JSON string into appropriate variable |
---|
| 438 | * |
---|
| 439 | * @param string $str JSON-formatted string |
---|
| 440 | * |
---|
| 441 | * @return mixed number, boolean, string, array, or object |
---|
| 442 | * corresponding to given JSON input string. |
---|
| 443 | * See argument 1 to Services_JSON() above for object-output behavior. |
---|
| 444 | * Note that decode() always returns strings |
---|
| 445 | * in ASCII or UTF-8 format! |
---|
| 446 | * @access public |
---|
| 447 | */ |
---|
| 448 | function decode($str) |
---|
| 449 | { |
---|
| 450 | $str = $this->reduce_string($str); |
---|
| 451 | |
---|
| 452 | switch (strtolower($str)) { |
---|
| 453 | case 'true': |
---|
| 454 | return true; |
---|
| 455 | |
---|
| 456 | case 'false': |
---|
| 457 | return false; |
---|
| 458 | |
---|
| 459 | case 'null': |
---|
| 460 | return null; |
---|
| 461 | |
---|
| 462 | default: |
---|
| 463 | if (is_numeric($str)) { |
---|
| 464 | // Lookie-loo, it's a number |
---|
| 465 | |
---|
| 466 | // This would work on its own, but I'm trying to be |
---|
| 467 | // good about returning integers where appropriate: |
---|
| 468 | // return (float)$str; |
---|
| 469 | |
---|
| 470 | // Return float or int, as appropriate |
---|
| 471 | return ((float)$str == (integer)$str) |
---|
| 472 | ? (integer)$str |
---|
| 473 | : (float)$str; |
---|
| 474 | |
---|
| 475 | } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) { |
---|
| 476 | // STRINGS RETURNED IN UTF-8 FORMAT |
---|
| 477 | $delim = substr($str, 0, 1); |
---|
| 478 | $chrs = substr($str, 1, -1); |
---|
| 479 | $utf8 = ''; |
---|
| 480 | $strlen_chrs = strlen($chrs); |
---|
| 481 | |
---|
| 482 | for ($c = 0; $c < $strlen_chrs; ++$c) { |
---|
| 483 | |
---|
| 484 | $substr_chrs_c_2 = substr($chrs, $c, 2); |
---|
| 485 | $ord_chrs_c = ord($chrs{$c}); |
---|
| 486 | |
---|
| 487 | switch (true) { |
---|
| 488 | case $substr_chrs_c_2 == '\b': |
---|
| 489 | $utf8 .= chr(0x08); |
---|
| 490 | ++$c; |
---|
| 491 | break; |
---|
| 492 | case $substr_chrs_c_2 == '\t': |
---|
| 493 | $utf8 .= chr(0x09); |
---|
| 494 | ++$c; |
---|
| 495 | break; |
---|
| 496 | case $substr_chrs_c_2 == '\n': |
---|
| 497 | $utf8 .= chr(0x0A); |
---|
| 498 | ++$c; |
---|
| 499 | break; |
---|
| 500 | case $substr_chrs_c_2 == '\f': |
---|
| 501 | $utf8 .= chr(0x0C); |
---|
| 502 | ++$c; |
---|
| 503 | break; |
---|
| 504 | case $substr_chrs_c_2 == '\r': |
---|
| 505 | $utf8 .= chr(0x0D); |
---|
| 506 | ++$c; |
---|
| 507 | break; |
---|
| 508 | |
---|
| 509 | case $substr_chrs_c_2 == '\\"': |
---|
| 510 | case $substr_chrs_c_2 == '\\\'': |
---|
| 511 | case $substr_chrs_c_2 == '\\\\': |
---|
| 512 | case $substr_chrs_c_2 == '\\/': |
---|
| 513 | if (($delim == '"' && $substr_chrs_c_2 != '\\\'') || |
---|
| 514 | ($delim == "'" && $substr_chrs_c_2 != '\\"')) { |
---|
| 515 | $utf8 .= $chrs{++$c}; |
---|
| 516 | } |
---|
| 517 | break; |
---|
| 518 | |
---|
| 519 | case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)): |
---|
| 520 | // single, escaped unicode character |
---|
| 521 | $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2))) |
---|
| 522 | . chr(hexdec(substr($chrs, ($c + 4), 2))); |
---|
| 523 | $utf8 .= $this->utf162utf8($utf16); |
---|
| 524 | $c += 5; |
---|
| 525 | break; |
---|
| 526 | |
---|
| 527 | case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F): |
---|
| 528 | $utf8 .= $chrs{$c}; |
---|
| 529 | break; |
---|
| 530 | |
---|
| 531 | case ($ord_chrs_c & 0xE0) == 0xC0: |
---|
| 532 | // characters U-00000080 - U-000007FF, mask 110XXXXX |
---|
| 533 | //see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 534 | $utf8 .= substr($chrs, $c, 2); |
---|
| 535 | ++$c; |
---|
| 536 | break; |
---|
| 537 | |
---|
| 538 | case ($ord_chrs_c & 0xF0) == 0xE0: |
---|
| 539 | // characters U-00000800 - U-0000FFFF, mask 1110XXXX |
---|
| 540 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 541 | $utf8 .= substr($chrs, $c, 3); |
---|
| 542 | $c += 2; |
---|
| 543 | break; |
---|
| 544 | |
---|
| 545 | case ($ord_chrs_c & 0xF8) == 0xF0: |
---|
| 546 | // characters U-00010000 - U-001FFFFF, mask 11110XXX |
---|
| 547 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 548 | $utf8 .= substr($chrs, $c, 4); |
---|
| 549 | $c += 3; |
---|
| 550 | break; |
---|
| 551 | |
---|
| 552 | case ($ord_chrs_c & 0xFC) == 0xF8: |
---|
| 553 | // characters U-00200000 - U-03FFFFFF, mask 111110XX |
---|
| 554 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 555 | $utf8 .= substr($chrs, $c, 5); |
---|
| 556 | $c += 4; |
---|
| 557 | break; |
---|
| 558 | |
---|
| 559 | case ($ord_chrs_c & 0xFE) == 0xFC: |
---|
| 560 | // characters U-04000000 - U-7FFFFFFF, mask 1111110X |
---|
| 561 | // see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8 |
---|
| 562 | $utf8 .= substr($chrs, $c, 6); |
---|
| 563 | $c += 5; |
---|
| 564 | break; |
---|
| 565 | |
---|
| 566 | } |
---|
| 567 | |
---|
| 568 | } |
---|
| 569 | |
---|
| 570 | return $utf8; |
---|
| 571 | |
---|
| 572 | } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) { |
---|
| 573 | // array, or object notation |
---|
| 574 | |
---|
| 575 | if ($str{0} == '[') { |
---|
| 576 | $stk = array(SERVICES_JSON_IN_ARR); |
---|
| 577 | $arr = array(); |
---|
| 578 | } else { |
---|
| 579 | if ($this->use == SERVICES_JSON_LOOSE_TYPE) { |
---|
| 580 | $stk = array(SERVICES_JSON_IN_OBJ); |
---|
| 581 | $obj = array(); |
---|
| 582 | } else { |
---|
| 583 | $stk = array(SERVICES_JSON_IN_OBJ); |
---|
| 584 | $obj = new stdClass(); |
---|
| 585 | } |
---|
| 586 | } |
---|
| 587 | |
---|
| 588 | array_push($stk, array('what' => SERVICES_JSON_SLICE, |
---|
| 589 | 'where' => 0, |
---|
| 590 | 'delim' => false)); |
---|
| 591 | |
---|
| 592 | $chrs = substr($str, 1, -1); |
---|
| 593 | $chrs = $this->reduce_string($chrs); |
---|
| 594 | |
---|
| 595 | if ($chrs == '') { |
---|
| 596 | if (reset($stk) == SERVICES_JSON_IN_ARR) { |
---|
| 597 | return $arr; |
---|
| 598 | |
---|
| 599 | } else { |
---|
| 600 | return $obj; |
---|
| 601 | |
---|
| 602 | } |
---|
| 603 | } |
---|
| 604 | |
---|
| 605 | //print("\nparsing {$chrs}\n"); |
---|
| 606 | |
---|
| 607 | $strlen_chrs = strlen($chrs); |
---|
| 608 | |
---|
| 609 | for ($c = 0; $c <= $strlen_chrs; ++$c) { |
---|
| 610 | |
---|
| 611 | $top = end($stk); |
---|
| 612 | $substr_chrs_c_2 = substr($chrs, $c, 2); |
---|
| 613 | |
---|
| 614 | if (($c == $strlen_chrs) || (($chrs{$c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) { |
---|
| 615 | // found a comma that is not inside a string, array, etc., |
---|
| 616 | // OR we've reached the end of the character list |
---|
| 617 | $slice = substr($chrs, $top['where'], ($c - $top['where'])); |
---|
| 618 | array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false)); |
---|
| 619 | //print("Found split at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
| 620 | |
---|
| 621 | if (reset($stk) == SERVICES_JSON_IN_ARR) { |
---|
| 622 | // we are in an array, so just push an element onto the stack |
---|
| 623 | array_push($arr, $this->decode($slice)); |
---|
| 624 | |
---|
| 625 | } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { |
---|
| 626 | // we are in an object, so figure |
---|
| 627 | // out the property name and set an |
---|
| 628 | // element in an associative array, |
---|
| 629 | // for now |
---|
| 630 | if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { |
---|
| 631 | // "name":value pair |
---|
| 632 | $key = $this->decode($parts[1]); |
---|
| 633 | $val = $this->decode($parts[2]); |
---|
| 634 | |
---|
| 635 | if ($this->use == SERVICES_JSON_LOOSE_TYPE) { |
---|
| 636 | $obj[$key] = $val; |
---|
| 637 | } else { |
---|
| 638 | $obj->$key = $val; |
---|
| 639 | } |
---|
| 640 | } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) { |
---|
| 641 | // name:value pair, where name is unquoted |
---|
| 642 | $key = $parts[1]; |
---|
| 643 | $val = $this->decode($parts[2]); |
---|
| 644 | |
---|
| 645 | if ($this->use == SERVICES_JSON_LOOSE_TYPE) { |
---|
| 646 | $obj[$key] = $val; |
---|
| 647 | } else { |
---|
| 648 | $obj->$key = $val; |
---|
| 649 | } |
---|
| 650 | } |
---|
| 651 | |
---|
| 652 | } |
---|
| 653 | |
---|
| 654 | } elseif ((($chrs{$c} == '"') || ($chrs{$c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) { |
---|
| 655 | // found a quote, and we are not inside a string |
---|
| 656 | array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{$c})); |
---|
| 657 | //print("Found start of string at {$c}\n"); |
---|
| 658 | |
---|
| 659 | } elseif (($chrs{$c} == $top['delim']) && |
---|
| 660 | ($top['what'] == SERVICES_JSON_IN_STR) && |
---|
| 661 | (($chrs{$c - 1} != '\\') || |
---|
| 662 | ($chrs{$c - 1} == '\\' && $chrs{$c - 2} == '\\'))) { |
---|
| 663 | // found a quote, we're in a string, and it's not escaped |
---|
| 664 | array_pop($stk); |
---|
| 665 | //print("Found end of string at {$c}: ".substr($chrs, $top['where'], (1 + 1 + $c - $top['where']))."\n"); |
---|
| 666 | |
---|
| 667 | } elseif (($chrs{$c} == '[') && |
---|
| 668 | in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
---|
| 669 | // found a left-bracket, and we are in an array, object, or slice |
---|
| 670 | array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false)); |
---|
| 671 | //print("Found start of array at {$c}\n"); |
---|
| 672 | |
---|
| 673 | } elseif (($chrs{$c} == ']') && ($top['what'] == SERVICES_JSON_IN_ARR)) { |
---|
| 674 | // found a right-bracket, and we're in an array |
---|
| 675 | array_pop($stk); |
---|
| 676 | //print("Found end of array at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
| 677 | |
---|
| 678 | } elseif (($chrs{$c} == '{') && |
---|
| 679 | in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
---|
| 680 | // found a left-brace, and we are in an array, object, or slice |
---|
| 681 | array_push($stk, array('what' => SERVICES_JSON_IN_OBJ, 'where' => $c, 'delim' => false)); |
---|
| 682 | //print("Found start of object at {$c}\n"); |
---|
| 683 | |
---|
| 684 | } elseif (($chrs{$c} == '}') && ($top['what'] == SERVICES_JSON_IN_OBJ)) { |
---|
| 685 | // found a right-brace, and we're in an object |
---|
| 686 | array_pop($stk); |
---|
| 687 | //print("Found end of object at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
| 688 | |
---|
| 689 | } elseif (($substr_chrs_c_2 == '/*') && |
---|
| 690 | in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) { |
---|
| 691 | // found a comment start, and we are in an array, object, or slice |
---|
| 692 | array_push($stk, array('what' => SERVICES_JSON_IN_CMT, 'where' => $c, 'delim' => false)); |
---|
| 693 | $c++; |
---|
| 694 | //print("Found start of comment at {$c}\n"); |
---|
| 695 | |
---|
| 696 | } elseif (($substr_chrs_c_2 == '*/') && ($top['what'] == SERVICES_JSON_IN_CMT)) { |
---|
| 697 | // found a comment end, and we're in one now |
---|
| 698 | array_pop($stk); |
---|
| 699 | $c++; |
---|
| 700 | |
---|
| 701 | for ($i = $top['where']; $i <= $c; ++$i) |
---|
| 702 | $chrs = substr_replace($chrs, ' ', $i, 1); |
---|
| 703 | |
---|
| 704 | //print("Found end of comment at {$c}: ".substr($chrs, $top['where'], (1 + $c - $top['where']))."\n"); |
---|
| 705 | |
---|
| 706 | } |
---|
| 707 | |
---|
| 708 | } |
---|
| 709 | |
---|
| 710 | if (reset($stk) == SERVICES_JSON_IN_ARR) { |
---|
| 711 | return $arr; |
---|
| 712 | |
---|
| 713 | } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) { |
---|
| 714 | return $obj; |
---|
| 715 | |
---|
| 716 | } |
---|
| 717 | |
---|
| 718 | } |
---|
| 719 | } |
---|
| 720 | } |
---|
| 721 | |
---|
| 722 | } |
---|
| 723 | |
---|
| 724 | ?> |
---|