ajax 返回json格式数据问题

[shrimpma]

ExtJs +php5.1.4+mysql 开发
ExtJS 请求服务器端，返回json格式的数据，php5.1.4 不支持json_encode()函数，用了一个第三方用php写的实现类似功能的类。



mysql 里存储的数据正常，没有乱码 ，一切正常。。

若mysql中有几条数据乱码，则在火狐中仍能正常显示；但在ie中无法显示数据。

(在ie中通过Fiddler查看返回的数据，发现{"success":true,"total":2,"data":[{"idx":null,"internal_ip":"aa","sub_grp_name":"研发二部","website":"tieba.baidu.com","title":"\/log\/postmonitor\/2011\/06\/09\/1039289383.html=?title?=鉂?,"content_dir":"\/log\/postmonitor\/2011\/06\/09\/1039289383.html","time":"2011-06-09 10:39:28","_id":1,"_parent":null,"_is_leaf":true},{"idx":null,"internal_ip":"bb","sub_grp_name":"研发二部","website":"tieba.baidu.com","title":"\/log\/postmonitor\/2011\/06\/09\/1035354067.html=?title?=鉂?,"content_dir":"\/log\/postmonitor\/2011\/06\/09\/1035354067.html","time":"2011-06-09 10:35:35","_id":2,"_parent":null,"_is_leaf":true}]})

value 缺少“ ，请高手指点下

[Go 旅城通票]

输出前用header设置下编码试试，IE可能没能识别乱码，导致字符串未闭合

[shrimpma]

define('SERVICES_JSON_SLICE', 1);

/**
* Marker constant for Services_JSON::decode(), used to flag stack state
*/
define('SERVICES_JSON_IN_STR', 2);

/**
* Marker constant for Services_JSON::decode(), used to flag stack state
*/
define('SERVICES_JSON_IN_ARR', 3);

/**
* Marker constant for Services_JSON::decode(), used to flag stack state
*/
define('SERVICES_JSON_IN_OBJ', 4);

/**
* Marker constant for Services_JSON::decode(), used to flag stack state
*/
define('SERVICES_JSON_IN_CMT', 5);

/**
* Behavior switch for Services_JSON::decode()
*/
define('SERVICES_JSON_LOOSE_TYPE', 16);

/**
* Behavior switch for Services_JSON::decode()
*/
define('SERVICES_JSON_SUPPRESS_ERRORS', 32);

/**
* Converts to and from JSON format.
*
* Brief example of use:
*
* <code>
* // create a new instance of Services_JSON
* $json = new Services_JSON();
*
* // convert a complexe value to JSON notation, and send it to the browser
* $value = array('foo', 'bar', array(1, 2, 'baz'), array(3, array(4)));
* $output = $json->encode($value);
*
* print($output);
* // prints: ["foo","bar",[1,2,"baz"],[3,[4]]]
*
* // accept incoming POST data, assumed to be in JSON notation
* $input = file_get_contents('php://input', 1000000);
* $value = $json->decode($input);
* </code>
*/
class Services_JSON
{
/**
* constructs a new JSON instance
*
* @param int $use object behavior flags; combine with boolean-OR
*
* possible values:
* - SERVICES_JSON_LOOSE_TYPE: loose typing.
* "{...}" syntax creates associative arrays
* instead of objects in decode().
* - SERVICES_JSON_SUPPRESS_ERRORS: error suppression.
* Values which can't be encoded (e.g. resources)
* appear as NULL instead of throwing errors.
* By default, a deeply-nested resource will
* bubble up with an error, so all return values
* from encode() should be checked with isError()
*/
function Services_JSON($use = 0)
{
$this->use = $use;
}

/**
* convert a string from one UTF-16 char to one UTF-8 char
*
* Normally should be handled by mb_convert_encoding, but
* provides a slower PHP-only method for installations
* that lack the multibye string extension.
*
* @param string $utf16 UTF-16 character
* @return string UTF-8 character
* @access private
*/
function utf162utf8($utf16)
{
// oh please oh please oh please oh please oh please
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):
// this case should never be reached, because we are in ASCII range
// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
return chr(0x7F & $bytes);

case (0x07FF & $bytes) == $bytes:
// return a 2-byte UTF-8 character
// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
return chr(0xC0 | (($bytes >> 6) & 0x1F))
. chr(0x80 | ($bytes & 0x3F));

case (0xFFFF & $bytes) == $bytes:
// return a 3-byte UTF-8 character
// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
return chr(0xE0 | (($bytes >> 12) & 0x0F))
. chr(0x80 | (($bytes >> 6) & 0x3F))
. chr(0x80 | ($bytes & 0x3F));
}

// ignoring UTF-32 for now, sorry
return '';
}

/**
* convert a string from one UTF-8 char to one UTF-16 char
*
* Normally should be handled by mb_convert_encoding, but
* provides a slower PHP-only method for installations
* that lack the multibye string extension.
*
* @param string $utf8 UTF-8 character
* @return string UTF-16 character
* @access private
*/
function utf82utf16($utf8)
{
// oh please oh please oh please oh please oh please
if(function_exists('mb_convert_encoding')) {
return mb_convert_encoding($utf8, 'UTF-16', 'UTF-8');
}

switch(strlen($utf8)) {
case 1:
// this case should never be reached, because we are in ASCII range
// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
return $utf8;

case 2:
// return a UTF-16 character from a 2-byte UTF-8 char
// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
return chr(0x07 & (ord($utf8{0}) >> 2))
. chr((0xC0 & (ord($utf8{0}) << 6))
| (0x3F & ord($utf8{1})));

case 3:
// return a UTF-16 character from a 3-byte UTF-8 char
// see: http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
return chr((0xF0 & (ord($utf8{0}) << 4))
| (0x0F & (ord($utf8{1}) >> 2)))
. chr((0xC0 & (ord($utf8{1}) << 6))
| (0x7F & ord($utf8{2})));
}

// ignoring UTF-32 for now, sorry
return '';
}

/**
* encodes an arbitrary variable into JSON format
*
* @param mixed $var any number, boolean, string, array, or object to be encoded.
* see argument 1 to Services_JSON() above for array-parsing behavior.
* if var is a strng, note that encode() always expects it
* to be in ASCII or UTF-8 format!
*
* @return mixed JSON string representation of input var or an error if a problem occurs
* @access public
*/

[shrimpma]

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':
// STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT
$ascii = '';
$strlen_var = strlen($var);

/*
* Iterate over every character in the string,
* escaping with a slash or encoding to UTF-8 where necessary
*/
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:
// double quote, slash, slosh
$ascii .= '\\'.$var{$c};
break;

case (($ord_var_c >= 0x20) && ($ord_var_c <= 0xFF)):
// characters U-00000000 - U-0000007F (same as ASCII)
$ascii .= $var{$c};
break;

case (($ord_var_c & 0xE0) == 0xC0):
// characters U-00000080 - U-000007FF, mask 110XXXXX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$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):
// characters U-00000800 - U-0000FFFF, mask 1110XXXX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$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):
// characters U-00010000 - U-001FFFFF, mask 11110XXX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$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):
// characters U-00200000 - U-03FFFFFF, mask 111110XX
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$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):
// characters U-04000000 - U-7FFFFFFF, mask 1111110X
// see http://www.cl.cam.ac.uk/~mgk25/unicode.html#utf-8
$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':
/*
* As per JSON spec if any array key is not an integer
* we must treat the the whole array as an object. We
* also try to catch a sparsely populated associative
* array with numeric keys here because some JS engines
* will create an array with empty indexes up to
* max_index which can cause memory issues and because
* the keys, which may be relevant, will be remapped
* otherwise.
*
* As per the ECMA and JSON specification an object may
* have any string as a property. Unfortunately due to
* a hole in the ECMA specification if the key is a
* ECMA reserved word or starts with a digit the
* parameter is only accessible using ECMAScript's
* bracket notation.
*/

// treat as a JSON object
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) . '}';
}

// treat it like a regular array
$elements = array_map(array($this, 'encode'), $var);

foreach($elements as $element) {
if(Services_JSON::isError($element)) {
return $element;
}
}

return '[' . $this->html_en_code(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 '{' . $this->html_en_code(join(',', $properties)) . '}';

default:
return ($this->use & SERVICES_JSON_SUPPRESS_ERRORS)
? 'null'
: new Services_JSON_Error(gettype($var)." can not be encoded as JSON string");
}
}

[shrimpma]

function html_en_code($char)
{
$char=str_replace("<","<",$char);
$char=str_replace(">",">",$char);
return $char;

}

/**
* array-walking function for use in generating JSON-formatted name-value pairs
*
* @param string $name name of key to use
* @param mixed $value reference to an array element to be encoded
*
* @return string JSON-formatted name-value pair, like '"name":value'
* @access private
*/
function name_value($name, $value)
{
$encoded_value = $this->encode($value);

if(Services_JSON::isError($encoded_value)) {
return $encoded_value;
}

return $this->encode(strval($name)) . ':' . $encoded_value;
}

/**
* reduce a string by removing leading and trailing comments and whitespace
*
* @param $str string string value to strip of comments and whitespace
*
* @return string string value stripped of comments and whitespace
* @access private
*/
function reduce_string($str)
{
$str = preg_replace(array(

// eliminate single line comments in '// ...' form
'#^\s*//(.+)$#m',

// eliminate multi-line comments in '/* ... */' form, at start of string
'#^\s*/\*(.+)\*/#Us',

// eliminate multi-line comments in '/* ... */' form, at end of string
'#/\*(.+)\*/\s*$#Us'

), '', $str);

// eliminate extraneous space
return trim($str);
}

[flyerwing]

js都不行?
直接用就好了呀.

[shrimpma]

这就是类的部分代码 php.net 官方可以下载

[yuxh81]

为什么我没有碰到这样的问题？？

我一直是这么写的。。。

[shrimpma]

[Quote=引用 6 楼 showbo 的回复:]

输出前用header设置下编码试试，IE可能没能识别乱码，导致字符串未闭合
[/Quote]
的确是ie中字符串编码没有闭合的问题。设置了header 强制编码也没有作用

感觉主要是class Services_JSON 的问题。类中encode 方法 case 'string':
// STRINGS ARE EXPECTED TO BE IN ASCII OR UTF-8 FORMAT