json_encode 编码,对中文友好.

function jsonx_encode($array) {
	static $replace=array();
	if(!$replace) {
		for($i=0; $i < 0x20; $i++) {
			//$t = $find[$i];
			$t = chr($i);
			$replace[$t] = sprintf("\u%04x",$i);
		}
		$replace["\"]="\\";
		$replace["""]="\"";
		$replace["	"]="\t";
		$replace["
"]="\r";
		$replace["
"]="\n";
		$replace[""]="\f";
		$replace[""]="\b";
	}

	$str = '';
	if(is_array($array) || is_object($array)) {
		$array = (array) $array;
		$is_o = array_keys($array) !== range(0, count($array) - 1);
		$str .= ($is_o ? "{" : '[');
		$is_start=0;
		foreach($array as $k => $v) {
			$str .= ($is_start ? "," : '');
			$is_start =1;
			if($is_o){
				$str .= '"';
				$str .= strtr($k, $replace);
				$str .= '":';
			}
			$t = __FUNCTION__;
			$str .= $t($v);
		}
		$str .= ($is_o ? "}" : ']');
	}
	elseif(is_bool($array)) {
		$str .= ($array ? "true" : "false");
	}
	elseif(is_string($array)) {
		$str .= '"';
		$str .= strtr($array, $replace);
		$str .= '"';
	}
	elseif(is_numeric($array)) {
		$str .= $array;
	}
	else{
		$str .= 'null';
	}
	return $str;
}