diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb365e5..4e49465 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 All Notable changes to `support` will be documented in this file
 
+## 1.3.1 - 2016-08-25
+
+- CHANGE add if(!function_exists()) for some existing laravel functions and others to skip conflict.
+
 ## 1.3.0 - 2016-08-24
 
 - ADD PHP 7.1 support.
diff --git a/src/array.php b/src/array.php
index 7fdb4ac..b4ca1c1 100644
--- a/src/array.php
+++ b/src/array.php
@@ -160,50 +160,56 @@ function CleanUpArrayOfInt($array)
     return $result;
 }
 
-/**
- * Returns an array with two elements.
- *
- * Iterates over each value in the array passing them to the callback function.
- * If the callback function returns true, the current value from array is returned in the first
- * element of result array. If not, it is return in the second element of result array.
- *
- * Array keys are preserved.
- *
- * @param array $array
- * @param callable $callback
- * @return array
- * @see https://github.com/spatie/array-functions/blob/master/src/array_functions.php
- */
-function array_split_filter(array $array, callable $callback)
-{
-    $passesFilter = array_filter($array, $callback);
-    $negatedCallback = function ($item) use ($callback) {
-        return !$callback($item);
-    };
-    $doesNotPassFilter = array_filter($array, $negatedCallback);
-    return [$passesFilter, $doesNotPassFilter];
+if (!function_exists('array_split_filter')) {
+
+    /**
+     * Returns an array with two elements.
+     *
+     * Iterates over each value in the array passing them to the callback function.
+     * If the callback function returns true, the current value from array is returned in the first
+     * element of result array. If not, it is return in the second element of result array.
+     *
+     * Array keys are preserved.
+     *
+     * @param array $array
+     * @param callable $callback
+     * @return array
+     * @see https://github.com/spatie/array-functions/blob/master/src/array_functions.php
+     */
+    function array_split_filter(array $array, callable $callback)
+    {
+        $passesFilter = array_filter($array, $callback);
+        $negatedCallback = function ($item) use ($callback) {
+            return !$callback($item);
+        };
+        $doesNotPassFilter = array_filter($array, $negatedCallback);
+        return [$passesFilter, $doesNotPassFilter];
+    }
 }
 
-/**
- * Checks whether specific value exists in array of object.
- * For exampe, following code
- *  $exist = in_array_column([['id' => 1], ['id' => 2], ['id' => 3]], 3, 'id');
- * will produce 2
- * @author wapmorgan
- * @since 2015.05.19
- * @param array $haystack Source array
- * @param mixed $needle Needed value
- * @param string $column Column to perform search
- * @param bool $strict Should search be strict or not.
- * @return bool True if value exists in array, False otherwise.
- * @see modified from https://github.com/wapmorgan/php-functions-repository/blob/master/i/in_array_column.php
- */
-function in_array_column($haystack, $needle, $column, $strict = false)
-{
-    foreach ($haystack as $k => $elem) {
-        if ((!$strict && $elem[$column] == $needle) || ($strict && $elem[$column] === $needle)) {
-            return true;
+if (!function_exists('in_array_column')) {
+
+    /**
+     * Checks whether specific value exists in array of object.
+     * For exampe, following code
+     *  $exist = in_array_column([['id' => 1], ['id' => 2], ['id' => 3]], 3, 'id');
+     * will produce 2
+     * @author wapmorgan
+     * @since 2015.05.19
+     * @param array $haystack Source array
+     * @param mixed $needle Needed value
+     * @param string $column Column to perform search
+     * @param bool $strict Should search be strict or not.
+     * @return bool True if value exists in array, False otherwise.
+     * @see modified from https://github.com/wapmorgan/php-functions-repository/blob/master/i/in_array_column.php
+     */
+    function in_array_column($haystack, $needle, $column, $strict = false)
+    {
+        foreach ($haystack as $k => $elem) {
+            if ((!$strict && $elem[$column] == $needle) || ($strict && $elem[$column] === $needle)) {
+                return true;
+            }
         }
+        return false;
     }
-    return false;
 }
diff --git a/src/helpers.php b/src/helpers.php
index 58be996..9dcbb7a 100644
--- a/src/helpers.php
+++ b/src/helpers.php
@@ -1,19 +1,22 @@
 <?php
 
-/**
- * @param int $red
- * @param int $green
- * @param int $blue
- * @return string
- * @see https://github.com/spatie-custom/blender/blob/master/app/Foundation/helpers.php
- */
-function rgb2hex(int $red, int $green, int $blue):  string
-{
-    return '#' . collect([$red, $green, $blue])
-        ->map(function (int $decimal):  string {
-            return str_pad(dechex($decimal), 2, STR_PAD_LEFT);
-        })
-        ->implode('');
+if (!function_exists('rgb2hex')) {
+
+    /**
+     * @param int $red
+     * @param int $green
+     * @param int $blue
+     * @return string
+     * @see https://github.com/spatie-custom/blender/blob/master/app/Foundation/helpers.php
+     */
+    function rgb2hex(int $red, int $green, int $blue):  string
+    {
+        return '#' . collect([$red, $green, $blue])
+            ->map(function (int $decimal):  string {
+                return str_pad(dechex($decimal), 2, STR_PAD_LEFT);
+            })
+            ->implode('');
+    }
 }
 
 /**
@@ -37,18 +40,21 @@ function format_euro(float $val = 0) : string
     return format_money($val, 2, '&euro; ');
 }
 
-/**
- * Given a number, return the number + 'th' or 'rd' etc
- * @param $cdnl
- * @return string
- */
-function ordinal($cdnl)
-{
-    $test_c = abs($cdnl) % 10;
-    $ext = ((abs($cdnl) % 100 < 21 && abs($cdnl) % 100 > 4) ? 'th'
-        : (($test_c < 4) ? ($test_c < 3) ? ($test_c < 2) ? ($test_c < 1)
-            ? 'th' : 'st' : 'nd' : 'rd' : 'th'));
-    return $cdnl . $ext;
+if (!function_exists('ordinal')) {
+
+    /**
+     * Given a number, return the number + 'th' or 'rd' etc
+     * @param $cdnl
+     * @return string
+     */
+    function ordinal($cdnl)
+    {
+        $test_c = abs($cdnl) % 10;
+        $ext = ((abs($cdnl) % 100 < 21 && abs($cdnl) % 100 > 4) ? 'th'
+            : (($test_c < 4) ? ($test_c < 3) ? ($test_c < 2) ? ($test_c < 1)
+                ? 'th' : 'st' : 'nd' : 'rd' : 'th'));
+        return $cdnl . $ext;
+    }
 }
 
 if (!function_exists('value')) {
@@ -185,7 +191,7 @@ function getMaximumFileUploadSize(bool $humanFormat = false)
  * @param string $chiave the key to encrypt. if empty generate a random key on the fly.
  * @return string
  */
-function EncryptString(string $string, string $chiave = '')
+function encryptString(string $string, string $chiave = '')
 {
     if ($chiave == '') {
         $chiave = str_random(64);
diff --git a/src/reflection.php b/src/reflection.php
index 594a1c0..57af284 100644
--- a/src/reflection.php
+++ b/src/reflection.php
@@ -1,37 +1,43 @@
 <?php
 
-/**
- * @param $object
- * @return string
- */
-function short_class_name($object): string
-{
-    $objectProperties = new \ReflectionClass($object);
+if (!function_exists('short_class_name')) {
 
-    return $objectProperties->getShortName();
+    /**
+     * @param $object
+     * @return string
+     */
+    function short_class_name($object): string
+    {
+        $objectProperties = new \ReflectionClass($object);
+
+        return $objectProperties->getShortName();
+    }
 }
 
-/**
- * Get all class constants that starts with $startsWithFilter
- * or if empty get all class constants.
- * @param $object
- * @param string $startsWithFilter
- * @return array
- * @see https://github.com/spatie-custom/blender/blob/master/app/Foundation/helpers.php
- */
-function class_constants($object, string $startsWithFilter = ''): array
-{
-    $objectProperties = new \ReflectionClass($object);
+if (!function_exists('class_constants')) {
+
+    /**
+     * Get all class constants that starts with $startsWithFilter
+     * or if empty get all class constants.
+     * @param $object
+     * @param string $startsWithFilter
+     * @return array
+     * @see https://github.com/spatie-custom/blender/blob/master/app/Foundation/helpers.php
+     */
+    function class_constants($object, string $startsWithFilter = ''): array
+    {
+        $objectProperties = new \ReflectionClass($object);
 
-    $constants = $objectProperties->getConstants();
+        $constants = $objectProperties->getConstants();
 
-    if ($startsWithFilter == '') {
-        return $constants;
-    }
+        if ($startsWithFilter == '') {
+            return $constants;
+        }
 
-    return array_filter($constants, function ($key) use ($startsWithFilter) {
-        return starts_with(strtolower($key), strtolower($startsWithFilter));
-    }, ARRAY_FILTER_USE_KEY);
+        return array_filter($constants, function ($key) use ($startsWithFilter) {
+            return starts_with(strtolower($key), strtolower($startsWithFilter));
+        }, ARRAY_FILTER_USE_KEY);
+    }
 }
 
 if (!function_exists('class_uses_recursive')) {
diff --git a/src/sanitize.php b/src/sanitize.php
index d799065..2bacecc 100644
--- a/src/sanitize.php
+++ b/src/sanitize.php
@@ -1,28 +1,34 @@
 <?php
 
-/**
- * Strip new line breaks from a string
- * @param $str
- * @return string|array
- */
-function strip_nl($str)
-{
-    return str_replace("\n", "", str_replace("\r", "", $str));
+if (!function_exists('strip_nl')) {
+
+    /**
+     * Strip new line breaks from a string
+     * @param $str
+     * @return string|array
+     */
+    function strip_nl($str)
+    {
+        return str_replace("\n", "", str_replace("\r", "", $str));
+    }
 }
 
-/**
- * Javascript escape
- * @param string $str
- * @return string
- * @source https://github.com/rtconner/laravel-plusplus/blob/laravel-5/src/plus-functions.php
- */
-function jse(string $str) : string
-{
-    if (isNullOrEmpty($str)) {
-        return '';
+if (!function_exists('jse')) {
+
+    /**
+     * Javascript escape
+     * @param string $str
+     * @return string
+     * @source https://github.com/rtconner/laravel-plusplus/blob/laravel-5/src/plus-functions.php
+     */
+    function jse(string $str) : string
+    {
+        if (isNullOrEmpty($str)) {
+            return '';
+        }
+        $str = str_replace("\n", "", str_replace("\r", "", $str));
+        return addslashes($str);
     }
-    $str = str_replace("\n", "", str_replace("\r", "", $str));
-    return addslashes($str);
 }
 
 if (!function_exists('e')) {
diff --git a/src/string.php b/src/string.php
index 5a4a0b6..cf28d85 100644
--- a/src/string.php
+++ b/src/string.php
@@ -360,86 +360,97 @@ function dash2underscore(string $word) : string
     return str_replace('-', '_', strtolower($word));
 }
 
-/**
- * Replace multiple spaces with one space.
- * @param string $str
- * @return string
- */
-function str_replace_multiple_space(string $str) : string
-{
-    return preg_replace('/\s+/', ' ', $str);
-}
+if (!function_exists('str_replace_multiple_space')) {
 
-/**
- * Replace last occurrence ($search) of a string ($subject) with $replace string.
- * @param string $search
- * @param string $replace
- * @param string $subject
- * @return string
- */
-function str_replace_last(string $search, string $replace, string $subject) : string
-{
-    if ($search == '') {
-        return $subject;
-    }
-    $position = strrpos($subject, $search);
-    if ($position === false) {
-        return $subject;
+    /**
+     * Replace multiple spaces with one space.
+     * @param string $str
+     * @return string
+     */
+    function str_replace_multiple_space(string $str) : string
+    {
+        return preg_replace('/\s+/', ' ', $str);
     }
-    return substr_replace($subject, $replace, $position, strlen($search));
 }
 
-/**
- * Get a segment from a string based on a delimiter.
- * Returns an empty string when the offset doesn't exist.
- * Use a negative index to start counting from the last element.
- *
- * @param string $delimiter
- * @param int $index
- * @param string $subject
- *
- * @return string
- * @see https://github.com/spatie/string/blob/master/src/Str.php
- */
-function segment($delimiter, $index, $subject)
-{
-    $segments = explode($delimiter, $subject);
-    if ($index < 0) {
-        $segments = array_reverse($segments);
-        $index = (int)abs($index) - 1;
+if (!function_exists('str_replace_last')) {
+    /**
+     * Replace last occurrence ($search) of a string ($subject) with $replace string.
+     * @param string $search
+     * @param string $replace
+     * @param string $subject
+     * @return string
+     */
+    function str_replace_last(string $search, string $replace, string $subject) : string
+    {
+        if ($search == '') {
+            return $subject;
+        }
+        $position = strrpos($subject, $search);
+        if ($position === false) {
+            return $subject;
+        }
+        return substr_replace($subject, $replace, $position, strlen($search));
     }
-    $segment = isset($segments[$index]) ? $segments[$index] : '';
-    return $segment;
 }
+if (!function_exists('segment')) {
 
-/**
- * Get the first segment from a string based on a delimiter.
- *
- * @param string $delimiter
- * @param string $subject
- *
- * @return string
- * @see https://github.com/spatie/string/blob/master/src/Str.php
- */
-function firstSegment($delimiter, $subject) : string
-{
-    return segment($delimiter, 0, $subject);
+    /**
+     * Get a segment from a string based on a delimiter.
+     * Returns an empty string when the offset doesn't exist.
+     * Use a negative index to start counting from the last element.
+     *
+     * @param string $delimiter
+     * @param int $index
+     * @param string $subject
+     *
+     * @return string
+     * @see https://github.com/spatie/string/blob/master/src/Str.php
+     */
+    function segment($delimiter, $index, $subject)
+    {
+        $segments = explode($delimiter, $subject);
+        if ($index < 0) {
+            $segments = array_reverse($segments);
+            $index = (int)abs($index) - 1;
+        }
+        $segment = isset($segments[$index]) ? $segments[$index] : '';
+        return $segment;
+    }
 }
+if (!function_exists('firstSegment')) {
 
-/**
- * Get the last segment from a string based on a delimiter.
- *
- * @param string $delimiter
- * @param string $subject
- *
- * @return string
- * @see https://github.com/spatie/string/blob/master/src/Str.php
- */
-function lastSegment($delimiter, $subject) : string
-{
-    return segment($delimiter, -1, $subject);
+    /**
+     * Get the first segment from a string based on a delimiter.
+     *
+     * @param string $delimiter
+     * @param string $subject
+     *
+     * @return string
+     * @see https://github.com/spatie/string/blob/master/src/Str.php
+     */
+    function firstSegment($delimiter, $subject) : string
+    {
+        return segment($delimiter, 0, $subject);
+    }
 }
 
+if (!function_exists('lastSegment')) {
+
+    /**
+     * Get the last segment from a string based on a delimiter.
+     *
+     * @param string $delimiter
+     * @param string $subject
+     *
+     * @return string
+     * @see https://github.com/spatie/string/blob/master/src/Str.php
+     */
+    function lastSegment($delimiter, $subject) : string
+    {
+        return segment($delimiter, -1, $subject);
+    }
+}
 /**
  * Return true if $subject is null or empty string ('').
  * @param $subject