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<title>[32070] trunk: Improve handling of incomplete From and Content-Type headers in `wp_mail()`.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/32070">32070</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/32070","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>boonebgorges</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2015-04-07 20:09:46 +0000 (Tue, 07 Apr 2015)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Improve handling of incomplete From and Content-Type headers in `wp_mail()`.

When an incomplete header is provided (eg, 'From' with an email address but no
name), ensure that the WP defaults are filled in properly.

Props valendesigns.
Fixes <a href="https://core.trac.wordpress.org/ticket/30266">#30266</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludespluggablephp">trunk/src/wp-includes/pluggable.php</a></li>
<li><a href="#trunktestsphpunittestsmailphp">trunk/tests/phpunit/tests/mail.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludespluggablephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/pluggable.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/pluggable.php       2015-04-07 19:13:45 UTC (rev 32069)
+++ trunk/src/wp-includes/pluggable.php 2015-04-07 20:09:46 UTC (rev 32070)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -302,30 +302,37 @@
</span><span class="cx" style="display: block; padding: 0 10px">                                switch ( strtolower( $name ) ) {
</span><span class="cx" style="display: block; padding: 0 10px">                                        // Mainly for legacy -- process a From: header if it's there
</span><span class="cx" style="display: block; padding: 0 10px">                                        case 'from':
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                if ( strpos($content, '<' ) !== false ) {
-                                                       // So... making my life hard again?
-                                                       $from_name = substr( $content, 0, strpos( $content, '<' ) - 1 );
-                                                       $from_name = str_replace( '"', '', $from_name );
-                                                       $from_name = trim( $from_name );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                         $bracket_pos = strpos( $content, '<' );
+                                               if ( $bracket_pos !== false ) {
+                                                       // Text before the bracketed email is the "From" name.
+                                                       if ( $bracket_pos > 0 ) {
+                                                               $from_name = substr( $content, 0, $bracket_pos - 1 );
+                                                               $from_name = str_replace( '"', '', $from_name );
+                                                               $from_name = trim( $from_name );
+                                                       }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                        $from_email = substr( $content, strpos( $content, '<' ) + 1 );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                 $from_email = substr( $content, $bracket_pos + 1 );
</ins><span class="cx" style="display: block; padding: 0 10px">                                                         $from_email = str_replace( '>', '', $from_email );
</span><span class="cx" style="display: block; padding: 0 10px">                                                        $from_email = trim( $from_email );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                } else {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                                               // Avoid setting an empty $from_email.
+                                               } elseif ( '' !== trim( $content ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                                         $from_email = trim( $content );
</span><span class="cx" style="display: block; padding: 0 10px">                                                }
</span><span class="cx" style="display: block; padding: 0 10px">                                                break;
</span><span class="cx" style="display: block; padding: 0 10px">                                        case 'content-type':
</span><span class="cx" style="display: block; padding: 0 10px">                                                if ( strpos( $content, ';' ) !== false ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                        list( $type, $charset ) = explode( ';', $content );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                 list( $type, $charset_content ) = explode( ';', $content );
</ins><span class="cx" style="display: block; padding: 0 10px">                                                         $content_type = trim( $type );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                        if ( false !== stripos( $charset, 'charset=' ) ) {
-                                                               $charset = trim( str_replace( array( 'charset=', '"' ), '', $charset ) );
-                                                       } elseif ( false !== stripos( $charset, 'boundary=' ) ) {
-                                                               $boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                                                 if ( false !== stripos( $charset_content, 'charset=' ) ) {
+                                                               $charset = trim( str_replace( array( 'charset=', '"' ), '', $charset_content ) );
+                                                       } elseif ( false !== stripos( $charset_content, 'boundary=' ) ) {
+                                                               $boundary = trim( str_replace( array( 'BOUNDARY=', 'boundary=', '"' ), '', $charset_content ) );
</ins><span class="cx" style="display: block; padding: 0 10px">                                                                 $charset = '';
</span><span class="cx" style="display: block; padding: 0 10px">                                                        }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                                                } else {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                                               // Avoid setting an empty $content_type.
+                                               } elseif ( '' !== trim( $content ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                                                         $content_type = trim( $content );
</span><span class="cx" style="display: block; padding: 0 10px">                                                }
</span><span class="cx" style="display: block; padding: 0 10px">                                                break;
</span></span></pre></div>
<a id="trunktestsphpunittestsmailphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/mail.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/mail.php        2015-04-07 19:13:45 UTC (rev 32069)
+++ trunk/tests/phpunit/tests/mail.php  2015-04-07 20:09:46 UTC (rev 32070)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -156,4 +156,94 @@
</span><span class="cx" style="display: block; padding: 0 10px">                // Fatal errors
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertFalse( wp_mail( 'invalid.address', 'subject', 'body', '', array() ) );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       /**
+        * @ticket 30266
+        */
+       public function test_wp_mail_with_valid_from_header() {
+               $to       = "address@tld.com";
+               $subject  = "Testing";
+               $message  = "Test Message";
+               $headers  = "From: Foo <bar@example.com>";
+               $expected = "From: Foo <bar@example.com>";
+
+               wp_mail( $to, $subject, $message, $headers );
+
+               $this->assertTrue( strpos( $GLOBALS['phpmailer']->mock_sent[0]['header'], $expected ) > 0 );
+       }
+
+       /**
+        * @ticket 30266
+        */
+       public function test_wp_mail_with_empty_from_header() {
+               $to       = "address@tld.com";
+               $subject  = "Testing";
+               $message  = "Test Message";
+               $headers  = "From: ";
+               $expected = "From: WordPress <wordpress@example.com>";
+
+               wp_mail( $to, $subject, $message, $headers );
+
+               $this->assertTrue( strpos( $GLOBALS['phpmailer']->mock_sent[0]['header'], $expected ) > 0 );
+       }
+
+       /**
+        * @ticket 30266
+        */
+       public function test_wp_mail_with_empty_from_name_for_the_from_header() {
+               $to       = "address@tld.com";
+               $subject  = "Testing";
+               $message  = "Test Message";
+               $headers  = "From: <wordpress@example.com>";
+               $expected = "From: WordPress <wordpress@example.com>";
+
+               wp_mail( $to, $subject, $message, $headers );
+
+               $this->assertTrue( strpos( $GLOBALS['phpmailer']->mock_sent[0]['header'], $expected ) > 0 );
+       }
+
+       /**
+        * @ticket 30266
+        */
+       public function test_wp_mail_with_valid_content_type_header() {
+               $to       = "address@tld.com";
+               $subject  = "Testing";
+               $message  = "Test Message";
+               $headers  = "Content-Type: text/html; charset=iso-8859-1";
+               $expected = "Content-Type: text/html; charset=iso-8859-1";
+
+               wp_mail( $to, $subject, $message, $headers );
+
+               $this->assertTrue( strpos( $GLOBALS['phpmailer']->mock_sent[0]['header'], $expected ) > 0 );
+       }
+
+       /**
+        * @ticket 30266
+        */
+       public function test_wp_mail_with_empty_content_type_header() {
+               $to       = "address@tld.com";
+               $subject  = "Testing";
+               $message  = "Test Message";
+               $headers  = "Content-Type: ";
+               $expected = "Content-Type: text/plain; charset=UTF-8";
+
+               wp_mail( $to, $subject, $message, $headers );
+
+               $this->assertTrue( strpos( $GLOBALS['phpmailer']->mock_sent[0]['header'], $expected ) > 0 );
+       }
+
+       /**
+        * @ticket 30266
+        */
+       public function test_wp_mail_with_empty_charset_for_the_content_type_header() {
+               $to       = "address@tld.com";
+               $subject  = "Testing";
+               $message  = "Test Message";
+               $headers  = "Content-Type: text/plain;";
+               $expected = "Content-Type: text/plain; charset=UTF-8";
+
+               wp_mail( $to, $subject, $message, $headers );
+
+               $this->assertTrue( strpos( $GLOBALS['phpmailer']->mock_sent[0]['header'], $expected ) > 0 );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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