print-beautiful-json.php

<?php
  // this function prints beautiful json
    function prettyPrint( $json ){
	    $result = '';
	    $level = 0;
	    $in_quotes = false;
	    $in_escape = false;
	    $ends_line_level = NULL;
	    $json_length = strlen( $json );

	    for( $i = 0; $i < $json_length; $i++ ) {
	        $char = $json[$i];
	        $new_line_level = NULL;
	        $post = "";
	        if( $ends_line_level !== NULL ) {
	            $new_line_level = $ends_line_level;
	            $ends_line_level = NULL;
	        }
	        if ( $in_escape ) {
	            $in_escape = false;
	        } else if( $char === '"' ) {
	            $in_quotes = !$in_quotes;
	        } else if( ! $in_quotes ) {
	            switch( $char ) {
	                case '}': case ']':
	                    $level--;
	                    $ends_line_level = NULL;
	                    $new_line_level = $level;
	                    break;

	                case '{': case '[':
	                    $level++;
	                case ',':
	                    $ends_line_level = $level;
	                    break;

	                case ':':
	                    $post = " ";
	                    break;

	                case " ": case "\t": case "\n": case "\r":
	                    $char = "";
	                    $ends_line_level = $new_line_level;
	                    $new_line_level = NULL;
	                    break;
	            }
	        } else if ( $char === '\\' ) {
	            $in_escape = true;
	        }
	        if( $new_line_level !== NULL ) {
	            $result .= "\n".str_repeat( "\t", $new_line_level );
	        }
	        $result .= $char.$post;
	    }

	    return $result;
	}