/**

 * 格式化

 */

class JsonFormatHelper

{

	/**

	 * json字符串缩进显示

	 * @param unknown $json

	 * @return string

	 */

	public static function jsonIndentShow($jsonStr)

	{

		echo self::jsonIndentFormat($jsonStr);

	}

	/**

	 * json字符串缩进

	 * @param unknown $json

	 * @return string

	 */

	public static function jsonIndentFormat($jsonStr)

	{

		$result = '';

		$indentCount = 0;

		$strLen = strlen($jsonStr);

		$indentStr = '    ';

		$newLine = "\r\n";

		$isInQuotes = false;

		$prevChar = '';

		for($i = 0; $i <= $strLen; $i++) {

			$char = substr($jsonStr, $i, 1);

			if($isInQuotes){

				$result .= $char;

				if(($char=='"' && $prevChar!='\\')){

					$isInQuotes = false;

				}

			}

			else{

				if(($char=='"' && $prevChar!='\\')){

					$isInQuotes = true;

					if ($prevChar != ':'){

						$result .= $newLine;

						for($j = 0; $j < $indentCount; $j++) {

							$result .= $indentStr;

						}

					}

					$result .= $char;

				}

				elseif(($char=='{' || $char=='[')){

					if ($prevChar != ':'){

						$result .= $newLine;

						for($j = 0; $j < $indentCount; $j++) {

							$result .= $indentStr;

						}

					}

					$result .= $char;

					$indentCount = $indentCount + 1;

				}

				elseif(($char=='}' || $char==']')){

					$indentCount = $indentCount - 1;

					$result .= $newLine;

					for($j = 0; $j < $indentCount; $j++) {

						$result .= $indentStr;

					}

					$result .= $char;

				}

				else{

					$result .= $char;

				}

			}

			$prevChar = $char;

		}

		return $result;

	}

}