PHP JSON decode 的替代方法

落日映苍穹つ 2022-09-19 10:42 224阅读 0赞

`<?php define('SERVICES_JSON_SLICE', 1); define('SERVICES_JSON_IN_STR', 2); define('SERVICES_JSON_IN_ARR', 3); define('SERVICES_JSON_IN_OBJ', 4); define('SERVICES_JSON_IN_CMT', 5); define('SERVICES_JSON_LOOSE_TYPE', 16); define('SERVICES_JSON_SUPPRESS_ERRORS', 32); class Services_JSON {     function Services_JSON($use = 0)     {         $this->use = $use;     }     function utf162utf8($utf16)     {         if(function_exists('mb_convert_encoding')) {             return mb_convert_encoding($utf16, 'UTF-8', 'UTF-16');         }         $bytes = (ord($utf16{ 0}) << 8) | ord($utf16{ 1});         switch(true) {             case ((0x7F & $bytes) == $bytes):                 return chr(0x7F & $bytes);             case (0x07FF & $bytes) == $bytes:                 return chr(0xC0 | (($bytes >> 6) & 0x1F)). chr(0x80 | ($bytes & 0x3F));             case (0xFFFF & $bytes) == $bytes:                 return chr(0xE0 | (($bytes >> 12) & 0x0F)). chr(0x80 | (($bytes >> 6) & 0x3F)). chr(0x80 | ($bytes & 0x3F));         }         return '';     }     function utf82utf16($utf8)     {         if(function_exists('mb_convert_encoding')) {             return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');         }         switch(strlen($utf8)) {             case 1:                 return $utf8;             case 2:                 return chr(0x07 & (ord($utf8{ 0}) >> 2)) . chr((0xC0 & (ord($utf8{ 0}) << 6)) | (0x3F & ord($utf8{ 1})));             case 3:                 return chr((0xF0 & (ord($utf8{ 0}) << 4)) | (0x0F & (ord($utf8{ 1}) >> 2))) . chr((0xC0 & (ord($utf8{ 1}) << 6)) | (0x7F & ord($utf8{ 2})));         }         return '';     }     function encode($var)     {         switch (gettype($var)) {             case 'boolean':                 return $var ? 'true' : 'false';             case 'NULL':                 return 'null';             case 'integer':                 return (int) $var;             case 'double':             case 'float':                 return (float) $var;             case 'string':                 $ascii = '';                 $strlen_var = strlen($var);                 for ($c = 0; $c < $strlen_var; ++$c) {                     $ord_var_c = ord($var{ $c});                     switch (true) {                         case $ord_var_c == 0x08:                             $ascii .= '\b';                             break;                         case $ord_var_c == 0x09:                             $ascii .= '\t';                             break;                         case $ord_var_c == 0x0A:                             $ascii .= '\n';                             break;                         case $ord_var_c == 0x0C:                             $ascii .= '\f';                             break;                         case $ord_var_c == 0x0D:                             $ascii .= '\r';                             break;                         case $ord_var_c == 0x22:                         case $ord_var_c == 0x2F:                         case $ord_var_c == 0x5C:                             $ascii .= '\\'.$var{ $c};                             break;                         case (($ord_var_c >= 0x20) && ($ord_var_c <= 0x7F)):                             $ascii .= $var{ $c};                             break;                         case (($ord_var_c & 0xE0) == 0xC0):                             $char = pack('C*', $ord_var_c, ord($var{ $c + 1}));                             $c += 1;                             $utf16 = $this->utf82utf16($char);                             $ascii .= sprintf('\u%04s', bin2hex($utf16));                             break;                         case (($ord_var_c & 0xF0) == 0xE0):                             $char = pack('C*', $ord_var_c, ord($var{ $c + 1}), ord($var{ $c + 2}));                             $c += 2;                             $utf16 = $this->utf82utf16($char);                             $ascii .= sprintf('\u%04s', bin2hex($utf16));                             break;                         case (($ord_var_c & 0xF8) == 0xF0):                             $char = pack('C*', $ord_var_c, ord($var{ $c + 1}), ord($var{ $c + 2}), ord($var{ $c + 3}));                             $c += 3;                             $utf16 = $this->utf82utf16($char);                             $ascii .= sprintf('\u%04s', bin2hex($utf16));                             break;                         case (($ord_var_c & 0xFC) == 0xF8):                             $char = pack('C*', $ord_var_c, ord($var{ $c + 1}), ord($var{ $c + 2}), ord($var{ $c + 3}), ord($var{ $c + 4}));                             $c += 4;                             $utf16 = $this->utf82utf16($char);                             $ascii .= sprintf('\u%04s', bin2hex($utf16));                             break;                         case (($ord_var_c & 0xFE) == 0xFC):                             $char = pack('C*', $ord_var_c, ord($var{ $c + 1}), ord($var{ $c + 2}), ord($var{ $c + 3}), ord($var{ $c + 4}), ord($var{ $c + 5}));                             $c += 5;                             $utf16 = $this->utf82utf16($char);                             $ascii .= sprintf('\u%04s', bin2hex($utf16));                             break;                     }                 }                 return '"'.$ascii.'"';             case 'array':                 if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {                     $properties = array_map(array($this, 'name_value'), array_keys($var), array_values($var));                     foreach($properties as $property) {                         if(Services_JSON::isError($property)) {                             return $property;                         }                     }                     return '{' . join(',', $properties) . '}';                 }                 $elements = array_map(array($this, 'encode'), $var);                 foreach($elements as $element) {                     if(Services_JSON::isError($element)) {                         return $element;                     }                 }                 return '[' . join(',', $elements) . ']';             case 'object':                 $vars = get_object_vars($var);                 $properties = array_map(array($this, 'name_value'),                 array_keys($vars),                 array_values($vars));                 foreach($properties as $property) {                     if(Services_JSON::isError($property)) {                         return $property;                     }                 }                 return '{' . join(',', $properties) . '}';             default:                 return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS) ? 'null' : new Services_JSON_Error(gettype($var)." can not be encoded as JSON string");         }     }     function name_value($name, $value)     {         $encoded_value = $this->encode($value);         if(Services_JSON::isError($encoded_value)) {             return $encoded_value;         }         return $this->encode(strval($name)) . ':' . $encoded_value;     }     function reduce_string($str)     {         $str = preg_replace(array( '#^\s*//(.+)$#m', '#^\s*/\*(.+)\*/#Us', '#/\*(.+)\*/\s*$#Us' ), '', $str);         return trim($str);     }     function decode($str)     {         $str = $this->reduce_string($str);         switch (strtolower($str)) {             case 'true':                 return true;             case 'false':                 return false;             case 'null':                 return null;             default:                 $m = array();                 if (is_numeric($str)) {                     return ((float)$str == (integer)$str)                     ? (integer)$str                     : (float)$str;                 } elseif (preg_match('/^("|\').*(\1)$/s', $str, $m) && $m[1] == $m[2]) {                     $delim = substr($str, 0, 1);                     $chrs = substr($str, 1, -1);                     $utf8 = '';                     $strlen_chrs = strlen($chrs);                     for ($c = 0; $c < $strlen_chrs; ++$c) {                         $substr_chrs_c_2 = substr($chrs, $c, 2);                         $ord_chrs_c = ord($chrs{ $c});                         switch (true) {                             case $substr_chrs_c_2 == '\b':                                 $utf8 .= chr(0x08);                                 ++$c;                                 break;                             case $substr_chrs_c_2 == '\t':                                 $utf8 .= chr(0x09);                                 ++$c;                                 break;                             case $substr_chrs_c_2 == '\n':                                 $utf8 .= chr(0x0A);                                 ++$c;                                 break;                             case $substr_chrs_c_2 == '\f':                                 $utf8 .= chr(0x0C);                                 ++$c;                                 break;                             case $substr_chrs_c_2 == '\r':                                 $utf8 .= chr(0x0D);                                 ++$c;                                 break;                             case $substr_chrs_c_2 == '\\"':                             case $substr_chrs_c_2 == '\\\'':                             case $substr_chrs_c_2 == '\\\\':                             case $substr_chrs_c_2 == '\\/':                                 if (($delim == '"' && $substr_chrs_c_2 != '\\\'') ||                                 ($delim == "'" && $substr_chrs_c_2 != '\\"')) {                                     $utf8 .= $chrs{++$c};                                 }                                 break;                             case preg_match('/\\\u[0-9A-F]{4}/i', substr($chrs, $c, 6)):                                 $utf16 = chr(hexdec(substr($chrs, ($c + 2), 2)))                                 . chr(hexdec(substr($chrs, ($c + 4), 2)));                                 $utf8 .= $this->utf162utf8($utf16);                                 $c += 5;                                 break;                             case ($ord_chrs_c >= 0x20) && ($ord_chrs_c <= 0x7F):                                 $utf8 .= $chrs{ $c};                                 break;                             case ($ord_chrs_c & 0xE0) == 0xC0:                                 $utf8 .= substr($chrs, $c, 2);                                 ++$c;                                 break;                             case ($ord_chrs_c & 0xF0) == 0xE0:                                 $utf8 .= substr($chrs, $c, 3);                                 $c += 2;                                 break;                             case ($ord_chrs_c & 0xF8) == 0xF0:                                 $utf8 .= substr($chrs, $c, 4);                                 $c += 3;                                 break;                             case ($ord_chrs_c & 0xFC) == 0xF8:                                 $utf8 .= substr($chrs, $c, 5);                                 $c += 4;                                 break;                             case ($ord_chrs_c & 0xFE) == 0xFC:                                 $utf8 .= substr($chrs, $c, 6);                                 $c += 5;                                 break;                         }                     }                     return $utf8;                 } elseif (preg_match('/^\[.*\]$/s', $str) || preg_match('/^\{.*\}$/s', $str)) {                     if ($str{ 0} == '[') {                         $stk = array(SERVICES_JSON_IN_ARR);                         $arr = array();                     } else {                         if ($this->use & SERVICES_JSON_LOOSE_TYPE) {                             $stk = array(SERVICES_JSON_IN_OBJ);                             $obj = array();                         } else {                             $stk = array(SERVICES_JSON_IN_OBJ);                             $obj = new stdClass();                         }                     }                     array_push($stk, array('what' => SERVICES_JSON_SLICE,'where' => 0,'delim' => false));                     $chrs = substr($str, 1, -1);                     $chrs = $this->reduce_string($chrs);                     if ($chrs == '') {                         if (reset($stk) == SERVICES_JSON_IN_ARR) {                             return $arr;                         } else {                             return $obj;                         }                     }                     $strlen_chrs = strlen($chrs);                     for ($c = 0; $c <= $strlen_chrs; ++$c) {                         $top = end($stk);                         $substr_chrs_c_2 = substr($chrs, $c, 2);                         if (($c == $strlen_chrs) || (($chrs{ $c} == ',') && ($top['what'] == SERVICES_JSON_SLICE))) {                             $slice = substr($chrs, $top['where'], ($c - $top['where']));                             array_push($stk, array('what' => SERVICES_JSON_SLICE, 'where' => ($c + 1), 'delim' => false));                             if (reset($stk) == SERVICES_JSON_IN_ARR) {                                 array_push($arr, $this->decode($slice));                             } elseif (reset($stk) == SERVICES_JSON_IN_OBJ) {                                 $parts = array();                                 if (preg_match('/^\s*(["\'].*[^\\\]["\'])\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {                                     $key = $this->decode($parts[1]);                                     $val = $this->decode($parts[2]);                                     if ($this->use & SERVICES_JSON_LOOSE_TYPE) {                                         $obj[$key] = $val;                                     } else {                                         $obj->$key = $val;                                     }                                 } elseif (preg_match('/^\s*(\w+)\s*:\s*(\S.*),?$/Uis', $slice, $parts)) {                                     $key = $parts[1];                                     $val = $this->decode($parts[2]);                                     if ($this->use & SERVICES_JSON_LOOSE_TYPE) {                                         $obj[$key] = $val;                                     } else {                                         $obj->$key = $val;                                     }                                 }                             }                         } elseif ((($chrs{ $c} == '"') || ($chrs{ $c} == "'")) && ($top['what'] != SERVICES_JSON_IN_STR)) {                             array_push($stk, array('what' => SERVICES_JSON_IN_STR, 'where' => $c, 'delim' => $chrs{ $c}));                         } elseif (($chrs{ $c} == $top['delim']) && ($top['what'] == SERVICES_JSON_IN_STR) && ((strlen(substr($chrs, 0, $c)) - strlen(rtrim(substr($chrs, 0, $c), '\\'))) % 2 != 1)) {                             array_pop($stk);                         } elseif (($chrs{ $c} == '[') && in_array($top['what'], array(SERVICES_JSON_SLICE, SERVICES_JSON_IN_ARR, SERVICES_JSON_IN_OBJ))) {                             array_push($stk, array('what' => SERVICES_JSON_IN_ARR, 'where' => $c, 'delim' => false));      `

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