[wp-trac] [WordPress Trac] #11097: shortcode_parse_atts - bug in preg_replace in PHP 4.3.2

[WordPress Trac]

#11097: shortcode_parse_atts - bug in preg_replace in PHP 4.3.2
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 Reporter:  bonaireguy    |       Owner:                               
     Type:  defect (bug)  |      Status:  new                          
 Priority:  high          |   Milestone:  Unassigned                   
Component:  Shortcodes    |     Version:  2.8.5                        
 Severity:  normal        |    Keywords:  shortcodes, php, preg_replace
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 On line 230 of wp-include/shortcodes.php is the line:

  $text = preg_replace("/[\x{00a0}\x{200b}]+/u", " ", $text);

 With $text = ' id="attachment_7" align="aligncenter" width="156"
 caption="Fresh Mint Tea in The Netherlands' the above preg_replace
 incorrectly returns an empty string in PHP 4.3.2

 In PHP 5.1.6 it returns the proper result (namely the same as the input
 $text string shown above).

 While a PHP bug is not really a WordPress bug, the minimum requirements
 for WordPress (see http://codex.wordpress.org/Hosting_WordPress) indicate
 that PHP 4.3 is compatible.

 Two solutions:

 1) Use a different method to replace the UTF-8 space codes the above
 preg_replace() call is meant to replace with ASCII spaces.

 2) Change the minimum requirements for WordPress (seems overkill).

 Note that this problem means that folks with PHP 4.3.2 and WordPress will
 not have proper shortcode processing, including captions for photos (which
 is I how discovered this).

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Ticket URL: <http://core.trac.wordpress.org/ticket/11097>
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