minor #4135 [#3940] Adding php example for an array of emails (weaverryan)

This PR was merged into the 2.3 branch.

Discussion
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[#3940] Adding php example for an array of emails

This follows #3940. It just adds the example also to PHP. But I can't see how this would work with XML.

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3+
| Fixed tickets |

Thanks!

Commits
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0366d6e [#3940] Adding php example for an array of emails

Author: weaverryan

cookbook/logging/monolog_email.rst

@@ -29,7 +29,7 @@ it is broken down.
                     from_email: error@example.com
                     to_email:   error@example.com
                     # or list of recipients
-                    # to_email:   [developer_1@example.com, developer_2@example.com, ...]
+                    # to_email:   [dev1@example.com, dev2@example.com, ...]
                     subject:    An Error Occurred!
                     level:      debug
 
@@ -82,6 +82,8 @@ it is broken down.
                     'type'       => 'swift_mailer',
                     'from_email' => 'error@example.com',
                     'to_email'   => 'error@example.com',
+                    // or a list of recipients
+                    // 'to_email'   => array('dev1@example.com', 'dev2@example.com', ...),
                     'subject'    => 'An Error Occurred!',
                     'level'      => 'debug',
                 ),