Javascript print_r

printr.js

function print_r (array) {
  // http://kevin.vanzonneveld.net
  // +   original by: Michael White (http://getsprink.com)
  // +   improved by: Ben Bryan
  // +      input by: Brett Zamir (http://brett-zamir.me)
  // +      improved by: Brett Zamir (http://brett-zamir.me)
  // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // -    depends on: echo
  // *     example 1: print_r(1, true);
  // *     returns 1: 1
	var return_val = true;
  var output = '',
      pad_char = ' ',
      pad_val = 4,
      d = this.window.document,
      getFuncName = function (fn) {
          var name = (/\W*function\s+([\w\$]+)\s*\(/).exec(fn);
          if (!name) {
              return '(Anonymous)';
          }
          return name[1];
      },
      repeat_char = function (len, pad_char) {
          var str = '';
          for (var i = 0; i < len; i++) {
              str += pad_char;
          }
          return str;
      },
      formatArray = function (obj, cur_depth, pad_val, pad_char) {
          if (cur_depth > 0) {
              cur_depth++;
          }

          var base_pad = repeat_char(pad_val * cur_depth, pad_char);
          var thick_pad = repeat_char(pad_val * (cur_depth + 1), pad_char);
          var str = '';

          if (typeof obj === 'object' && obj !== null && obj.constructor && getFuncName(obj.constructor) !== 'PHPJS_Resource') {
              str += 'Array\n' + base_pad + '(\n';
              for (var key in obj) {
                  if (Object.prototype.toString.call(obj[key]) === '[object Array]') {
                      str += thick_pad + '[' + key + '] => ' + formatArray(obj[key], cur_depth + 1, pad_val, pad_char);
                  }
                  else {
                      str += thick_pad + '[' + key + '] => ' + obj[key] + '\n';
                  }
              }
              str += base_pad + ')\n';
          }
          else if (obj === null || obj === undefined) {
              str = '';
          }
          else { // for our "resource" class
              str = obj.toString();
          }

          return str;
      };

  output = formatArray(array, 0, pad_val, pad_char);

  if (return_val !== true) {
      if (d.body) {
          this.echo(output);
      }
      else {
          try {
              d = XULDocument; // We're in XUL, so appending as plain text won't work; trigger an error out of XUL
              this.echo('<pre xmlns="http://www.w3.org/1999/xhtml" style="white-space:pre;">' + output + '</pre>');
          } catch (e) {
              this.echo(output); // Outputting as plain text may work in some plain XML
          }
      }
      return true;
  }
  return output;
}