Additional updates for processwire/processwire-issues#1467

wire/core/FilenameArray.php

@@ -41,6 +41,7 @@ class FilenameArray implements \IteratorAggregate, \Countable {
 	 * 
 	 */
 	protected function getKey($filename) {
+		$filename = (string) $filename;
 		$pos = strpos($filename, '?'); 
 		$key = $pos ? substr($filename, 0, $pos) : $filename;
 		return md5($key);

wire/core/Inputfield.php

@@ -1831,6 +1831,8 @@ abstract class Inputfield extends WireData implements Module {
 		/** @var Sanitizer $sanitizer */
 		$sanitizer = $this->wire('sanitizer');
 		
+		$str = (string) $str; 
+		
 		// if already encoded, then un-encode it
 		if(strpos($str, '&') !== false && preg_match('/&(#\d+|[a-zA-Z]+);/', $str)) {
 			$str = $sanitizer->unentities($str);

wire/core/PageFinder.php

@@ -2788,7 +2788,7 @@ class PageFinder extends Wire {
 					
 				} else if(in_array($field, array('created', 'modified', 'published'))) {
 					// prepare value for created, modified or published date fields
-					if(!ctype_digit($value)) {
+					if(!ctype_digit("$value")) {
 						$value = $datetime->strtotime($value); 
 					}
 					if(empty($value)) {