[wp-trac] [WordPress Trac] #60138: make_clickable() processing emails start with www. incorrectly.

[WordPress Trac]

#60138: make_clickable() processing emails start with www.  incorrectly.
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 Reporter:  olyahryhorenko17             |       Owner:  (none)
     Type:  defect (bug)                 |      Status:  new
 Priority:  normal                       |   Milestone:  Awaiting Review
Component:  Formatting                   |     Version:
 Severity:  trivial                      |  Resolution:
 Keywords:  has-patch changes-requested  |     Focuses:
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Comment (by ikpnqgcr55):

 To address the issue where `make_clickable()` processes email addresses
 starting with "www." incorrectly by treating them as FTP addresses and
 appending "https://" instead of "mailto:", we can create a custom filter
 to handle these cases correctly. Below is the modified approach to ensure
 that such email addresses are correctly converted into clickable mailto
 links:

 ```php
 // Custom filter to modify make_clickable() behavior for email addresses
 function custom_make_clickable( $text ) {
     // Define a regular expression pattern to identify email addresses
     $pattern = '/(?:^|\s)(www\.\S+@[\w.-]+)/i';

     // Use a callback function to replace matched email addresses with
 mailto links
     $text = preg_replace_callback( $pattern,
 'custom_make_clickable_callback', $text );

     // Return the modified text
     return $text;
 }

 // Callback function to create mailto links for email addresses starting
 with "www."
 function custom_make_clickable_callback( $matches ) {
     $email = esc_url( 'mailto:' . $matches[1] );
     return '<a href="' . $email . '">' . $matches[1] . '</a>';
 }

 // Apply the custom make_clickable filter
 add_filter( 'make_clickable', 'custom_make_clickable', 10, 1 );
 ```

 Explanation:

 - We define a custom filter function `custom_make_clickable()` to modify
 the behavior of `make_clickable()` for email addresses.
 - Inside this filter function, we use a regular expression pattern to
 identify email addresses that start with "www.".
 - We then use `preg_replace_callback()` to replace each matched email
 address with a mailto link.
 - The `custom_make_clickable_callback()` function generates the mailto
 link for each matched email address.
 - Finally, we apply our custom `make_clickable` filter using
 `add_filter()`.

 By applying this custom filter, email addresses starting with "www." will
 be correctly recognized and converted into clickable mailto links instead
 of being treated as URLs with "https://" appended. This ensures that the
 behavior of `make_clickable()` aligns with the desired functionality.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/60138#comment:4>
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