Issue/211 deprecated php 8.1 notices

src/QueryPath/CSS/Selector.php

@@ -58,7 +58,7 @@ public function __construct() {
     $this->selectors[$this->groupIndex][] = $this->currSelector;
   }
 
-  public function getIterator() {
+  public function getIterator(): \Traversable {
     return new \ArrayIterator($this->selectors);
   }
 
@@ -73,7 +73,7 @@ public function toArray() {
     return $this->selectors;
   }
 
-  public function count() {
+  public function count():int {
     return count($this->selectors);
   }
 

src/QueryPath/DOMQuery.php

@@ -7,7 +7,7 @@
  * was done for a few reasons:
  * - The library has been refactored, and it made more sense to call the top
  *   level class QueryPath. This is not the top level class.
- * - There have been requests for a JSONQuery class, which would be the 
+ * - There have been requests for a JSONQuery class, which would be the
  *   natural complement of DOMQuery.
  */
 
@@ -96,8 +96,8 @@ class DOMQuery implements \QueryPath\Query, \IteratorAggregate, \Countable {
    *   An associative array of options.
    * @see qp()
    */
-  public function __construct($document = NULL, $string = NULL, $options = array()) {
-    $string = trim($string);
+  public function __construct($document = NULL, $string = '', $options = array()) {
+    $string = trim( (string)$string );
     $this->options = $options + Options::get() + $this->options;
 
     $parser_flags = isset($options['parser_flags']) ? $options['parser_flags'] : self::DEFAULT_PARSER_FLAGS;
@@ -364,7 +364,7 @@ public function size() {
    * @return int
    *  The number of matches in the DOMQuery.
    */
-  public function count() {
+  public function count(): int {
     return $this->matches->count();
   }
 
@@ -3985,7 +3985,7 @@ public function __call($name, $arguments) {
    * @return Iterable
    *  Returns an iterator.
    */
-  public function getIterator() {
+  public function getIterator(): \Traversable {
     $i = new QueryPathIterator($this->matches);
     $i->options = $this->options;
     return $i;

src/QueryPath/QueryPathIterator.php

@@ -18,8 +18,8 @@
 class QueryPathIterator extends \IteratorIterator {
   public $options = array();
   private $qp = NULL;
-
-  public function current() {
+  
+  public function current(): mixed {
     if (!isset($this->qp)) {
       $this->qp = \QueryPath::with(parent::current(), NULL, $this->options);
     }