php5.4以下版本json不支持不转义内容中文的解决方法

{"orderCode":"1401160935542399","creator":"u751fu6d3bu7528u54c1u6d4bu8bd5u5c0fu5c4b"}

//模拟joson中文不转义
if (version_compare(PHP_VERSION,'5.4.0') >= 0) {
??? function json_encode_ex($var) {
??????? return json_encode($var,JSON_UNESCAPED_UNICODE);
??? }
} else {
??? function json_encode_ex($var) {
??????? if ($var === null)
??????????? return 'null';

PHP实战??????? if ($var === true)
??????????? return 'true';

PHP实战??????? if ($var === false)
??????????? return 'false';

PHP实战??????? static $reps = array(
??????????? array("","/","n","t","r","b","f",'"',),
??????????? array('\','/','n','t','r','b','f','"',
??????? );

PHP实战??????? if (is_scalar($var))
??????????? return '"' . str_replace($reps[0],$reps[1],(string) $var) . '"';

PHP实战??????? if (!is_array($var))
??????????? throw new Exception('JSON encoder error!');

PHP实战??????? $isMap = false;
??????? $i = 0;
??????? foreach (array_keys($var) as $k) {
??????????? if (!is_int($k) || $i++ != $k) {
??????????????? $isMap = true;
??????????????? break;
??????????? }
??????? }

PHP实战??????? $s = array();

PHP实战??????? if ($isMap) {
??????????? foreach ($var as $k => $v)
??????????????? $s[] = '"' . $k . '":' . call_user_func(__FUNCTION__,$v);

PHP实战??????????? return '{' . implode(',',$s) . '}';
??????? } else {
??????????? foreach ($var as $v)
??????????????? $s[] = call_user_func(__FUNCTION__,$v);

PHP实战??????????? return '[' . implode(',$s) . ']';
??????? }
??? }
}