refactor: replaces use of deprecated each function to improve PHP7 co…

…mpatibility (#14)

.travis.yml

@@ -1,8 +1,9 @@
+dist: trusty
 language: php
 php:
 - '7.0'
 - '5.6'
 - '5.5'
 install:
   - 'cd site/addons/Imgix && composer install'
-script: 'echo "Tests pending a harness from Statamic. imgix-php is well-tested though, and that''s there most of imgix-statamic''s logic lives."'
+script: 'echo "Tests pending a harness from Statamic. imgix-php is well-tested though, and that''s where most of imgix-statamic''s logic lives."'

site/addons/Imgix/ImgixTags.php

@@ -21,15 +21,16 @@ protected function categorizedAttributes() {
 
         unset($attrs['path']);
 
-        while (list($key, $val) = each($attrs)) {
-            $is_html_attr = in_array($key, self::$html_attributes);
-            $is_data_attr = strpos($key, 'data-') === 0;
-            $is_aria_attr = strpos($key, 'aria-') === 0;
-
-            if ($is_html_attr || $is_data_attr || $is_aria_attr) {
-                $categorized_attrs['img_attributes'][$key] = $val;
-            } else {
-                $categorized_attrs['imgix_attributes'][$key] = $val;
+        if (is_array($attrs)) {
+            foreach ($attrs as $key => $val) {
+                $is_html_attr = in_array($key, self::$html_attributes);
+                $is_data_attr = strpos($key, 'data-') === 0;
+                $is_aria_attr = strpos($key, 'aria-') === 0;
+                if ($is_html_attr || $is_data_attr || $is_aria_attr) {
+                    $categorized_attrs['img_attributes'][$key] = $val;
+                } else {
+                    $categorized_attrs['imgix_attributes'][$key] = $val;
+                }
             }
         }
 
@@ -48,8 +49,10 @@ protected function buildHtmlAttributes($categorized_attrs) {
 
         $html = '';
 
-        while (list($key, $val) = each($img_attributes)) {
-            $html .= " $key=\"$val\"";
+        if (is_array($img_attributes)) {
+            foreach ($img_attributes as $key => $val) {
+                $html .= " $key=\"$val\"";
+            }
         }
 
         return $html;