[wp-trac] [WordPress Trac] #9930: is_serialized() returns false on serialized doubles

[WordPress Trac]

#9930: is_serialized() returns false on serialized doubles
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 Reporter:  vladimir_kolesnikov  |        Owner:  westi         
     Type:  defect (bug)         |       Status:  reopened      
 Priority:  normal               |    Milestone:  Future Release
Component:  General              |      Version:                
 Severity:  minor                |   Resolution:                
 Keywords:  needs-refresh        |  
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Comment(by hakre):

 If someone is looking for a regex that is validating a whole float/double
 value, this one is pretty strict so far:

 {{{(d:(?:[-]?INF|[+-]?(?:(?:[0-9]+|(?:[0-9]*[\.][0-9]+)|(?:[0-9]+[\.][0-9]*))|(?:[0-9]+|(?:([0-9]*[\.][0-9]+)|(?:[0-9]+[\.][0-9]*)))[eE][+-]?[0-9]+));)}}}

 It takes care not only of the scientific notations but as well for INF and
 -INF. If you need to get a float to be serialized for a tests with INF,
 this did work for me without caring about a systems float size:

 {{{
    $float = INF; // or -INF
    $serialized = serialize($float);
 }}}

 For this ticket's traction I think it now depends on whether or not this
 should be fixed as it might imply performance issues. But the actual
 performance should be tested before making assumptions as my impression
 is, that PHP is pretty fast with regular expression when it calls for the
 same multiple times per request. This is the case for the is_serialized
 function.

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Ticket URL: <http://core.trac.wordpress.org/ticket/9930#comment:35>
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