Added custom header getter

changelog.md

@@ -1,5 +1,6 @@
 # ChangeLog
 
+* Add custom header getter
 * Use `application/javascript` for .js attachments
 * Improve RFC2821 compliance for timelimits, especially for end-of-data
 * Add Azerbaijani translations (Thanks to @mirjalal)

class.phpmailer.php

@@ -2952,6 +2952,16 @@ class PHPMailer
         }
     }
 
+    /**
+     * Returns all custom headers
+     *
+     * @return array
+     */
+    public function getCustomHeaders()
+    {
+        return $this->CustomHeader;
+    }
+
     /**
      * Create a message from an HTML string.
      * Automatically makes modifications for inline images and backgrounds

test/phpmailerTest.php

@@ -1680,6 +1680,33 @@ EOT;
             'SMTP connect with options failed'
         );
     }
+
+    /**
+     * Tests the Custom header getter
+     */
+    public function testCustomHeaderGetter()
+    {
+        $this->Mail->addCustomHeader('foo', 'bar');
+        $this->assertEquals(array(array('foo', 'bar')), $this->Mail->getCustomHeaders());
+
+        $this->Mail->addCustomHeader('foo', 'baz');
+        $this->assertEquals(array(
+            array('foo', 'bar'),
+            array('foo', 'baz')
+        ), $this->Mail->getCustomHeaders());
+
+        $this->Mail->clearCustomHeaders();
+        $this->assertEmpty($this->Mail->getCustomHeaders());
+
+        $this->Mail->addCustomHeader('yux');
+        $this->assertEquals(array(array('yux')), $this->Mail->getCustomHeaders());
+
+        $this->Mail->addCustomHeader('Content-Type: application/json');
+        $this->assertEquals(array(
+            array('yux'),
+            array('Content-Type', ' application/json')
+        ), $this->Mail->getCustomHeaders());
+    }
 }
 
 /**