indentJSON.php

<?php

	function indent_json ($json) 
	{
		$result = '';
		$pos = 0;
		$strLen = strlen($json);
		$indentStr = "\t";
		$newLine = "\n";
		$prevChar = '';
		$outOfQuotes = true;
		for ($i=0; $i<=$strLen; $i++):
			$char = substr($json, $i, 1);
			if ($char == '"' && $prevChar != '\\'):
				$outOfQuotes = !$outOfQuotes;
			elseif(($char == '}' || $char == ']') && $outOfQuotes):
				$result .= $newLine;
				$pos --;
				for ($j=0; $j<$pos; $j++):
					$result .= $indentStr;
				endfor;
			endif;
			$result .= $char;
			if (($char == ',' || $char == '{' || $char == '[') && $outOfQuotes):
				$result .= $newLine;
				if ($char == '{' || $char == '['):
					$pos ++;
				endif;
				
				for ($j = 0; $j < $pos; $j++):
					$result .= $indentStr;
				endfor;
			endif;
			$prevChar = $char;
		endfor;
		return $result;
	}

?>