phpjs/functions/var/var_export.js

php.js offers community built php functions in javascript

function var_export(mixed_expression, bool_return) {
  // From: http://phpjs.org/functions
  // +   original by: Philip Peterson
  // +   improved by: johnrembo
  // +   improved by: Brett Zamir (http://brett-zamir.me)
  // +      input by: Brian Tafoya (http://www.premasolutions.com/)
  // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
  // +   bugfixed by: Brett Zamir (http://brett-zamir.me)
  // +      input by: Hans Henrik (http://hanshenrik.tk/)
  // -    depends on: echo
  // *     example 1: var_export(null);
  // *     returns 1: null
  // *     example 2: var_export({0: 'Kevin', 1: 'van', 2: 'Zonneveld'}, true);
  // *     returns 2: "array (\n  0 => 'Kevin',\n  1 => 'van',\n  2 => 'Zonneveld'\n)"
  // *     example 3: data = 'Kevin';
  // *     example 3: var_export(data, true);
  // *     returns 3: "'Kevin'"

  var retstr = '',
      iret = '',
      value,
      cnt = 0,
      x = [],
      i = 0,
      funcParts = [],
      // We use the last argument (not part of PHP) to pass in
      // our indentation level
      idtLevel = arguments[2] || 2,
      innerIndent = '',
      outerIndent = '',
      getFuncName = function(fn) {
        var name = (/\W*function\s+([\w\$]+)\s*\(/).exec(fn);
        if (!name) {
          return '(Anonymous)';
        }
        return name[1];
      };
  _makeIndent = function(idtLevel) {
    return (new Array(idtLevel + 1)).join(' ');
  };
  __getType = function(inp) {
    var i = 0, match, types, cons, type = typeof inp;
    if (type === 'object' && (inp && inp.constructor) &&
            getFuncName(inp.constructor) === 'PHPJS_Resource') {
      return 'resource';
    }
    if (type === 'function') {
      return 'function';
    }
    if (type === 'object' && !inp) {
      return 'null'; // Should this be just null?
    }
    if (type === 'object') {
      if (!inp.constructor) {
        return 'object';
      }
      cons = inp.constructor.toString();
      match = cons.match(/(\w+)\(/);
      if (match) {
        cons = match[1].toLowerCase();
      }
      types = ['boolean', 'number', 'string', 'array'];
      for (i = 0; i < types.length; i++) {
        if (cons === types[i]) {
          type = types[i];
          break;
        }
      }
    }
    return type;
  };
  type = __getType(mixed_expression);

  if (type === null) {
    retstr = 'NULL';
  } else if (type === 'array' || type === 'object') {
    outerIndent = _makeIndent(idtLevel - 2);
    innerIndent = _makeIndent(idtLevel);
    for (i in mixed_expression) {
      value = this.var_export(mixed_expression[i], 1, idtLevel + 2);
      value = typeof value === 'string' ? value.replace(/</g, '&lt;').
          replace(/>/g, '&gt;') : value;
      x[cnt++] = innerIndent + i + ' => ' +
          (__getType(mixed_expression[i]) === 'array' ?
              '\n' : '') + value;
    }
    iret = x.join(',\n');
    retstr = outerIndent + 'array (\n' + iret + '\n' + outerIndent + ')';
  } else if (type === 'function') {
    funcParts = mixed_expression.toString().
            match(/function .*?\((.*?)\) \{([\s\S]*)\}/);

    // For lambda functions, var_export() outputs such as the following:
    // '\000lambda_1'. Since it will probably not be a common use to
    // expect this (unhelpful) form, we'll use another PHP-exportable
    // construct, create_function() (though dollar signs must be on the
    // variables in JavaScript); if using instead in JavaScript and you
    // are using the namespaced version, note that create_function() will
    // not be available as a global
    retstr = "create_function ('" + funcParts[1] + "', '" +
        funcParts[2].replace(new RegExp("'", 'g'), "\\'") + "')";
  } else if (type === 'resource') {
    retstr = 'NULL'; // Resources treated as null for var_export
  } else {
    retstr = typeof mixed_expression !== 'string' ? mixed_expression :
        "'" + mixed_expression.replace(/(["'])/g, '\\$1').
        replace(/\0/g, '\\0') + "'";
  }

  if (!bool_return) {
    this.echo(retstr);
    return null;
  }

  return retstr;
}