diff --git a/src/_util/util.js b/src/_util/util.js
index 433401ecf1..94372fdfc4 100644
--- a/src/_util/util.js
+++ b/src/_util/util.js
@@ -625,13 +625,13 @@ class Util {
     const headKeys = this._headKeys(headComments)
 
     const params = {
-      headKeys: headKeys,
-      name: name,
-      filepath: filepath,
-      codepath: codepath,
-      code: code,
-      language: language,
-      category: category,
+      headKeys,
+      name,
+      filepath,
+      codepath,
+      code,
+      language,
+      category,
       func_name: funcName,
       func_arguments: funcParams
     }
diff --git a/src/php/array/array_splice.js b/src/php/array/array_splice.js
index 2292fc48f0..4c790bb9ef 100644
--- a/src/php/array/array_splice.js
+++ b/src/php/array/array_splice.js
@@ -22,7 +22,7 @@ module.exports = function array_splice (arr, offst, lgth, replacement) { // esli
 
   const isInt = require('../var/is_int')
 
-  var _checkToUpIndices = function (arr, ct, key) {
+  const _checkToUpIndices = function (arr, ct, key) {
     // Deal with situation, e.g., if encounter index 4 and try
     // to set it to 0, but 0 exists later in loop (need to
     // increment all subsequent (skipping current key,
diff --git a/src/php/json/json_encode.js b/src/php/json/json_encode.js
index 2863a9f61a..34710d8e5e 100644
--- a/src/php/json/json_encode.js
+++ b/src/php/json/json_encode.js
@@ -71,7 +71,7 @@ module.exports = function json_encode (mixedVal) { // eslint-disable-line camelc
         : '"' + string + '"'
     }
 
-    var _str = function (key, holder) {
+    const _str = function (key, holder) {
       let gap = ''
       const indent = '    '
       // The loop counter.
diff --git a/src/php/math/max.js b/src/php/math/max.js
index 4064713934..846991bdd5 100644
--- a/src/php/math/max.js
+++ b/src/php/math/max.js
@@ -36,7 +36,7 @@ module.exports = function max () {
       return ar
     }
   }
-  var _compare = function (current, next) {
+  const _compare = function (current, next) {
     let i = 0
     let n = 0
     let tmp = 0
diff --git a/src/php/math/min.js b/src/php/math/min.js
index ec7e4867cb..7bc33c5981 100644
--- a/src/php/math/min.js
+++ b/src/php/math/min.js
@@ -36,7 +36,7 @@ module.exports = function min () {
     return ar
   }
 
-  var _compare = function (current, next) {
+  const _compare = function (current, next) {
     let i = 0
     let n = 0
     let tmp = 0
diff --git a/src/php/misc/pack.js b/src/php/misc/pack.js
index e49383e21b..9b5ecc10a3 100644
--- a/src/php/misc/pack.js
+++ b/src/php/misc/pack.js
@@ -267,7 +267,9 @@ module.exports = function pack (format) {
           const key = (lastBit = precisionBits - 1 +
             (k =
               (exp = bias + 1 - k) >= minExp &&
-              exp <= maxExp ? k + 1 : bias + 1 - (exp = minExp - 1))) + 1
+              exp <= maxExp
+                ? k + 1
+                : bias + 1 - (exp = minExp - 1))) + 1
 
           if (bin[key]) {
             if (!(rounded = bin[lastBit])) {
diff --git a/src/php/net-gopher/gopher_parsedir.js b/src/php/net-gopher/gopher_parsedir.js
index 48cf9a5437..603fd02a23 100644
--- a/src/php/net-gopher/gopher_parsedir.js
+++ b/src/php/net-gopher/gopher_parsedir.js
@@ -71,7 +71,7 @@ module.exports = function gopher_parsedir (dirent) { // eslint-disable-line came
       } // GOPHER_UNKNOWN
   }
   return {
-    type: type,
+    type,
     title: entry[2],
     path: entry[3],
     host: entry[4],
diff --git a/src/php/network/setrawcookie.js b/src/php/network/setrawcookie.js
index ae643cd664..ccfee952a8 100644
--- a/src/php/network/setrawcookie.js
+++ b/src/php/network/setrawcookie.js
@@ -26,9 +26,9 @@ module.exports = function setrawcookie (name, value, expires, path, domain, secu
   const r = [name + '=' + value]
   let i = ''
   const s = {
-    expires: expires,
-    path: path,
-    domain: domain
+    expires,
+    path,
+    domain
   }
   for (i in s) {
     if (s.hasOwnProperty(i)) {
diff --git a/src/php/url/http_build_query.js b/src/php/url/http_build_query.js
index 4990b6b4df..fdb45a8da3 100644
--- a/src/php/url/http_build_query.js
+++ b/src/php/url/http_build_query.js
@@ -36,7 +36,7 @@ module.exports = function http_build_query (formdata, numericPrefix, argSeparato
   let key
   const tmp = []
 
-  var _httpBuildQueryHelper = function (key, val, argSeparator) {
+  const _httpBuildQueryHelper = function (key, val, argSeparator) {
     let k
     const tmp = []
     if (val === true) {
diff --git a/src/php/var/print_r.js b/src/php/var/print_r.js
index 665c0a0a94..bb1b4d841a 100644
--- a/src/php/var/print_r.js
+++ b/src/php/var/print_r.js
@@ -21,7 +21,7 @@ module.exports = function print_r (array, returnVal) { // eslint-disable-line ca
     }
     return str
   }
-  var _formatArray = function (obj, curDepth, padVal, padChar) {
+  const _formatArray = function (obj, curDepth, padVal, padChar) {
     if (curDepth > 0) {
       curDepth++
     }
diff --git a/src/php/var/var_dump.js b/src/php/var/var_dump.js
index eec83d11e3..60a70dd044 100644
--- a/src/php/var/var_dump.js
+++ b/src/php/var/var_dump.js
@@ -110,7 +110,7 @@ module.exports = function var_dump () { // eslint-disable-line camelcase
     return ret
   }
 
-  var _formatArray = function (obj, curDepth, padVal, padChar) {
+  const _formatArray = function (obj, curDepth, padVal, padChar) {
     if (curDepth > 0) {
       curDepth++
     }
diff --git a/src/php/xdiff/xdiff_string_diff.js b/src/php/xdiff/xdiff_string_diff.js
index 40b9560301..693e60b6de 100644
--- a/src/php/xdiff/xdiff_string_diff.js
+++ b/src/php/xdiff/xdiff_string_diff.js
@@ -218,7 +218,7 @@ module.exports = function xdiff_string_diff (oldData, newData, contextLines, min
     }
 
     // Function to find lcs and fill in the array to indicate the optimal longest common sequence
-    var _findLcs = function (xs, xidx, xIsIn, ys) {
+    const _findLcs = function (xs, xidx, xIsIn, ys) {
       let i
       let xb
       let xe