Index: tests/Zend/Filter/InflectorTest.php
===================================================================
--- tests/Zend/Filter/InflectorTest.php	(revision 21111)
+++ tests/Zend/Filter/InflectorTest.php	(working copy)
@@ -422,7 +422,7 @@
         $this->_testOptions($inflector);
     }
 
-    public function testSetConfigSetsStateAndRules()
+    public function testPassingConfigObjectToSetConfigSetsStateAndRules()
     {
         $config = $this->getConfig();
         $inflector = new Zend_Filter_Inflector();
@@ -503,7 +503,27 @@
         $rules = $this->inflector->getRules('controller');
         $this->assertEquals(5, count($rules));
     }
-
+    
+	/**
+     * @issue ZF-8997
+     */
+    public function testPassingArrayToConstructorSetsStateAndRules()
+    {
+    	$options = $this->getOptions();
+        $inflector = new Zend_Filter_Inflector($options);
+        $this->_testOptions($inflector);
+    }
+    
+    /**
+     * @issue ZF-8997
+     */
+	public function testPassingArrayToSetConfigSetsStateAndRules()
+    {
+        $options = $this->getOptions();
+        $inflector = new Zend_Filter_Inflector();
+        $inflector->setOptions($options);
+        $this->_testOptions($inflector);
+    }
 }
 
 // Call Zend_Filter_InflectorTest::main() if this source file is executed directly.
Index: library/Zend/Filter/Inflector.php
===================================================================
--- library/Zend/Filter/Inflector.php	(revision 21111)
+++ library/Zend/Filter/Inflector.php	(working copy)
@@ -75,6 +75,8 @@
     {
         if ($target instanceof Zend_Config) {
             $this->setConfig($target);
+        } else if(is_array($target)) {
+        	$this->setOptions($target);
         } else {
             if ((null !== $target) && is_string($target)) {
                 $this->setTarget($target);
@@ -128,7 +130,18 @@
      */
     public function setConfig(Zend_Config $config)
     {
-        foreach ($config as $key => $value) {
+    	return $this->setOptions($config->toArray());
+    }
+    
+    /**
+     * Use Array object to set object state
+     *
+     * @param  Array $options
+     * @return Zend_Filter_Inflector
+     */
+    public function setOptions(Array $options)
+    {
+    	foreach ($options as $key => $value) {
             switch ($key) {
                 case 'target':
                     $this->setTarget($value);
@@ -137,8 +150,7 @@
                     if (is_scalar($value)) {
                         break;
                     }
-                    $paths = $value->toArray();
-                    foreach ($paths as $prefix => $path) {
+                    foreach ($value as $prefix => $path) {
                         $this->addFilterPrefixPath($prefix, $path);
                     }
                     break;
@@ -149,7 +161,7 @@
                     $this->setTargetReplacementIdentifier($value);
                     break;
                 case 'rules':
-                    $this->addRules($value->toArray());
+                    $this->addRules($value);
                     break;
                 default:
                     break;