function xml_to_json($source) {
if(is_file($source)){ //传的是文件，还是xml的string的判断
$xml_array=simplexml_load_file($source);
}else{
$source =uncdata($source) ;
$xml_array=simplexml_load_string($source);
}
$json = json_encode($xml_array); //php5，以及以上，如果是更早版本，请查看JSON.php
return decodeUnicode($json);
}
//处理CDATA
function uncdata($xml)
{
// States:
//
// 'out'
// '<'
// '<!'
// '<!['
// '<![C'
// '<![CD'
// '<![CDAT'
// '<![CDATA'
// 'in'
// ']'
// ']]'
//
// (Yes, the states a represented by strings.)
//
$state = 'out';
$a = str_split($xml);
$new_xml = '';
foreach ($a AS $k => $v) {
// Deal with "state".
switch ( $state ) {
case 'out':
if ( '<' == $v ) {
$state = $v;
} else {
$new_xml .= $v;
}
break;
case '<':
if ( '!' == $v ) {
$state = $state . $v;
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case '<!':
if ( '[' == $v ) {
$state = $state . $v;
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case '<![':
if ( 'C' == $v ) {
$state = $state . $v;
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case '<![C':
if ( 'D' == $v ) {
$state = $state . $v;
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case '<![CD':
if ( 'A' == $v ) {
$state = $state . $v;
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case '<![CDA':
if ( 'T' == $v ) {
$state = $state . $v;
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case '<![CDAT':
if ( 'A' == $v ) {
$state = $state . $v;
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case '<![CDATA':
if ( '[' == $v ) {
$cdata = '';
$state = 'in';
} else {
$new_xml .= $state . $v;
$state = 'out';
}
break;
case 'in':
if ( ']' == $v ) {
$state = $v;
} else {
$cdata .= $v;
}
break;
case ']':
if ( ']' == $v ) {
$state = $state . $v;
} else {
$cdata .= $state . $v;
$state = 'in';
}
break;
case ']]':
if ( '>' == $v ) {
$new_xml .= str_replace('>','>',
str_replace('>','<',
str_replace('"','"',
str_replace('&','&',
$cdata))));
$state = 'out';
} else {
$cdata .= $state . $v;
$state = 'in';
}
break;
} // switch
}
//
// Return.
//
return $new_xml;
}
//UNICODE转UTF-8
function decodeUnicode($str)
{
return preg_replace_callback('/\\\\u([0-9a-f]{4})/i',
create_function(
'$matches',
'return mb_convert_encoding(pack("H*", $matches[1]), "UTF-8", "UCS-2BE");'
),
$str);
}