Now that WordPress Core supports PHP >= 5.6, the PHPMailer library can be updated to the latest version.
The PHPMailer files now reside in a new directory, `wp-includes/PHPMailer`. These files are copied verbatim from the library upstream and will make updating in the future easier. For backwards compatibility, the old files will remain and trigger deprecated file warnings.
The PHPMailer class is also now under the `PHPMailer\PHPMailer\PHPMailer` namespace. The `PHPMailer` class in the global namespace has been aliased for a seamless transition.
This upgrade also clears up a handful of PHP compatibility issues detailed in #49922.
For a full list of changes, see the PHPMailer GitHub: https://github.com/PHPMailer/PHPMailer/compare/v5.2.27...v6.1.6.
Props Synchro, SergeyBiryukov, desrosj, donmhico, ayeshrajans.
Fixes#41750.
Built from https://develop.svn.wordpress.org/trunk@48033
git-svn-id: http://core.svn.wordpress.org/trunk@47800 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Includes two modifications for WordPress:
* Removes support for NTLM in `class-smtp.php` since the required client (`extras/ntlm_sasl_client.php`) is not distributed as part of WordPress.
* Requires `class-smtp.php` for backwards compatibility with direct (non-wp_mail()) uses of PHPMailer, as the autoloader isn't used. See [27385].
This also includes a change to our `MockMailer` for unit tests. It now overrides `postSend() instead of `send()`, and `preSend()`.
`preSend()` resets `$this->Encoding` because PHPMailer doesn't clean up after itself / presets all variables. This becomes an issue when `PHPMailer::createBody()` sets `$this->Encoding = 'quoted-printable'` (away from it's default of 8bit) when it encounters a line longer than 998 characters. `Tests_Comment::test_comment_field_lengths` is such a case.
props MattyRob, dd32.
fixes#28909.
Built from https://develop.svn.wordpress.org/trunk@33124
git-svn-id: http://core.svn.wordpress.org/trunk@33095 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Includes two trivial modifications for WordPress:
* Doesn't use the autoloader, so the check to enforce the autoloader from the constructor is removed.
* Requires class-smtp.php for backwards compatibility with direct (non-wp_mail()) uses of PHPMailer, as the autoloader isn't used.
props bpetty.
fixes#25560.
Built from https://develop.svn.wordpress.org/trunk@27385
git-svn-id: http://core.svn.wordpress.org/trunk@27233 1a063a9b-81f0-0310-95a4-ce76da25c4cd
