Added more type checking to avoid strict type errors.

Author: paquettg

src/PHPHtmlParser/Curl.php

@@ -21,6 +21,9 @@ class Curl implements CurlInterface
     public function get(string $url): string
     {
         $ch = curl_init($url);
+        if ($ch === false) {
+            throw new CurlException('Curl Init return `false`.');
+        }
 
         if ( ! ini_get('open_basedir')) {
             curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
@@ -37,6 +40,8 @@ public function get(string $url): string
             // there was a problem
             $error = curl_error($ch);
             throw new CurlException('Error retrieving "'.$url.'" ('.$error.')');
+        } elseif ($content === true) {
+            throw new CurlException('Unexpected return value of content set to true.');
         }
 
         return $content;

src/PHPHtmlParser/Dom/InnerNode.php

@@ -165,7 +165,10 @@ public function addChild(AbstractNode $child, int $before = -1): bool
         array_splice($children, $index, 0, [$insert]);
 
         // add the child
-        $this->children = array_combine($keys, $children);
+        $combination = array_combine($keys, $children);
+        if ($combination !== false) {
+            $this->children = $combination;
+        }
 
         // tell child I am the new parent
         $child->setParent($this);
@@ -338,7 +341,10 @@ public function replaceChild(int $childId, AbstractNode $newChild): void
         $keys = array_keys($this->children);
         $index = array_search($childId, $keys, true);
         $keys[$index] = $newChild->id();
-        $this->children = array_combine($keys, $this->children);
+        $combination = array_combine($keys, $this->children);
+        if ($combination !== false) {
+            $this->children = $combination;
+        }
         $this->children[$newChild->id()] = [
           'prev' => $oldChild['prev'],
           'node' => $newChild,