phpjs/functions/array/array_intersect_key.js

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function array_intersect_key(arr1) {
  //  discuss at: http://phpjs.org/functions/array_intersect_key/
  // original by: Brett Zamir (http://brett-zamir.me)
  //        note: These only output associative arrays (would need to be
  //        note: all numeric and counting from zero to be numeric)
  //   example 1: $array1 = {a: 'green', b: 'brown', c: 'blue', 0: 'red'}
  //   example 1: $array2 = {a: 'green', 0: 'yellow', 1: 'red'}
  //   example 1: array_intersect_key($array1, $array2)
  //   returns 1: {0: 'red', a: 'green'}

  var retArr = {},
    argl = arguments.length,
    arglm1 = argl - 1,
    k1 = '',
    arr = {},
    i = 0,
    k = '';

  arr1keys: for (k1 in arr1) {
    arrs: for (i = 1; i < argl; i++) {
      arr = arguments[i];
      for (k in arr) {
        if (k === k1) {
          if (i === arglm1) {
            retArr[k1] = arr1[k1];
          }
          // If the innermost loop always leads at least once to an equal value, continue the loop until done
          continue arrs;
        }
      }
      // If it reaches here, it wasn't found in at least one array, so try next value
      continue arr1keys;
    }
  }

  return retArr;
}