Fix PHP 8.6 warning when using is_a() with strings but without allow_string = true

1 files changed, 8 insertions, 8 deletions

diff --git a/it_xml.class b/it_xml.class
index d58f020..e8e9cc3 100644
--- a/it_xml.class
+++ b/it_xml.class
@@ -191,7 +191,7 @@ function start_element($dummy_parser, $name, $attrs)
 	else
 		array_unshift($this->_stack, new $name);
 
-	if (!is_a($this->_stack[0], "it_xml"))
+	if (!$this->_stack[0] instanceof it_xml)
 		$this->error .= "Class $name used in it_xml for tag $name does not extend it_xml: Name clash?\n";
 
 	if ($attrs)
@@ -214,7 +214,7 @@ function end_element($dummy_parser, $name)
 			array_push($this->_stack[1]->$name, $this->_stack[0]);
 		else if (isset($this->_stack[1]->$name))
 		{
-			if (is_a($this->_stack[1]->$name, "it_xml"))
+			if ($this->_stack[1]->$name instanceof it_xml)
 				$this->_stack[1]->$name = array($this->_stack[1]->$name, &$this->_stack[0]);
 			else
 				$this->error .= "Variable $name used in it_xml for tag {$name} is already used in object: Name clash?\n";
@@ -284,7 +284,7 @@ function to_xml($p = array())
 			{
 				foreach ($values as $value)
 				{
-					if (is_a($value, "it_xml"))
+					if ($value instanceof it_xml)
 					{
 						$body .= $value->to_xml($p);
 						$indentation = $currentindentation;
@@ -293,7 +293,7 @@ function to_xml($p = array())
 			}
 			else if (is_object($values))
 			{
-				if (is_a($values, "it_xml"))
+				if ($values instanceof it_xml)
 				{
 					$body .= $values->to_xml($p);
 					$indentation = $currentindentation;
@@ -317,7 +317,7 @@ function elements()
 
 	foreach (get_object_vars($this) as $key => $value)
 	{
-		if (is_a($value, "it_xml") || (is_array($value) && is_a($value[0], "it_xml")))
+		if ($value instanceof it_xml || (is_array($value) && $value[0] instanceof it_xml))
 			$result[$key] =& $this->$key;
 	}
 
@@ -326,7 +326,7 @@ function elements()
 
 function error()
 {
-	return is_a($this, "it_xml") ? $this->error : $GLOBALS['IT_XML_ERROR'];
+	return $this instanceof it_xml ? $this->error : $GLOBALS['IT_XML_ERROR'];
 }
 
 /**
@@ -351,7 +351,7 @@ function set($vals, $parentprefix = null)
 				$arr = (array)$this->$key;
 				foreach ($val as $i => $v)
 				{
-					if (!is_a($arr[$i], "it_xml"))
+					if (!$arr[$i] instanceof it_xml)
 						$arr[$i] = new $classname;
 					$arr[$i]->set($v, $prefix);
 				}
@@ -359,7 +359,7 @@ function set($vals, $parentprefix = null)
 			}
 			else
 			{
-				if (!is_a($this->$key, "it_xml"))
+				if (!$this->$key instanceof it_xml)
 					$this->$key = new $classname;
 				$this->$key->set($val, $prefix);
 			}