diff --git a/wire/core/PageArrayIterator.php b/wire/core/PageArrayIterator.php
index aca629ff..c20f3e56 100644
--- a/wire/core/PageArrayIterator.php
+++ b/wire/core/PageArrayIterator.php
@@ -135,6 +135,7 @@ class PageArrayIterator extends Wire implements \Iterator {
 	 * Rewind to beginning
 	 * 
 	 */
+	#[\ReturnTypeWillChange]
 	public function rewind() {
 		$this->pagesPosition = 0;
 		$this->position = 0;
@@ -149,6 +150,7 @@ class PageArrayIterator extends Wire implements \Iterator {
 	 * @return Page
 	 * 
 	 */
+	#[\ReturnTypeWillChange]
 	public function current() {
 		return $this->pages[$this->pagesPosition];
 	}
@@ -159,6 +161,7 @@ class PageArrayIterator extends Wire implements \Iterator {
 	 * @return int
 	 * 
 	 */
+	#[\ReturnTypeWillChange]
 	public function key() {
 		return $this->position;
 	}
@@ -167,6 +170,7 @@ class PageArrayIterator extends Wire implements \Iterator {
 	 * Update current position to next
 	 * 
 	 */
+	#[\ReturnTypeWillChange]
 	public function next() {
 		$this->pagesPosition++;
 		$this->position++;
@@ -178,6 +182,7 @@ class PageArrayIterator extends Wire implements \Iterator {
 	 * @return bool
 	 * 
 	 */
+	#[\ReturnTypeWillChange]
 	public function valid() {
 		if($this->position === 0 || $this->pagesPosition >= $this->pagesCount) {
 			// If we have just been rewound or if we have reached the end of the buffer,
diff --git a/wire/core/PagesEditor.php b/wire/core/PagesEditor.php
index ea0f2167..29744433 100644
--- a/wire/core/PagesEditor.php
+++ b/wire/core/PagesEditor.php
@@ -369,7 +369,7 @@ class PagesEditor extends Wire {
 		foreach($page->template->fieldgroup as $field) {
 			if($page->isLoaded($field->name)) continue; // value already set
 			if(!$page->hasField($field)) continue; // field not valid for page
-			if(!strlen($field->defaultValue)) continue; // no defaultValue property defined with Fieldtype config inputfields
+			if(!strlen("$field->defaultValue")) continue; // no defaultValue property defined with Fieldtype config inputfields
 			try {
 				$blankValue = $field->type->getBlankValue($page, $field);
 				if(is_object($blankValue) || is_array($blankValue)) continue; // we don't currently handle complex types
diff --git a/wire/core/PagesType.php b/wire/core/PagesType.php
index fe7cf216..08e65053 100644
--- a/wire/core/PagesType.php
+++ b/wire/core/PagesType.php
@@ -622,6 +622,7 @@ class PagesType extends Wire implements \IteratorAggregate, \Countable {
 	 * @see Pages::count()
 	 * 
 	 */
+	#[\ReturnTypeWillChange]
 	public function count($selectorString = '', array $options = array()) {
 		if(empty($selectorString) && empty($options) && count($this->parents) == 1) {
 			return $this->getParent()->numChildren();
diff --git a/wire/core/WireDateTime.php b/wire/core/WireDateTime.php
index 09611a8e..59725284 100644
--- a/wire/core/WireDateTime.php
+++ b/wire/core/WireDateTime.php
@@ -266,7 +266,7 @@ class WireDateTime extends Wire {
 	public function formatDate($value, $format) {
 
 		if(!$value) return '';
-		if(!strlen($format) || $format == 'U' || $format == '%s') return (int) $value; // unix timestamp
+		if(!strlen("$format") || $format === 'U' || $format === '%s') return (int) $value; // unix timestamp
 		$relativeStr = '';
 
 		if(strpos($format, '!') !== false) {
diff --git a/wire/modules/Process/ProcessPageLister/ProcessPageLister.module b/wire/modules/Process/ProcessPageLister/ProcessPageLister.module
index cc5101c4..f5c25e4c 100644
--- a/wire/modules/Process/ProcessPageLister/ProcessPageLister.module
+++ b/wire/modules/Process/ProcessPageLister/ProcessPageLister.module
@@ -504,7 +504,7 @@ class ProcessPageLister extends Process implements ConfigurableModule {
 		if(in_array('disableFilters', $this->toggles)) {
 			$s->attr('disabled', 'disabled');
 		}
-		$selector = $this->sessionGet('selector');
+		$selector = (string) $this->sessionGet('selector');
 		if($this->initSelector) {
 			if(strpos($selector, $this->initSelector) !== false) {
 				$selector = str_replace($this->initSelector, '', $selector); // ensure that $selector does not contain initSelector