[wp-trac] [WordPress Trac] #22286: Enhancing backslashit performance

[WordPress Trac]

#22286: Enhancing backslashit performance
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 Reporter:  jbutkus      |       Owner:
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  Awaiting Review
Component:  Formatting   |     Version:
 Severity:  normal       |  Resolution:
 Keywords:  has-patch    |
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Comment (by nacin):

 `isset( $string{0} ) && $string{0} >= '0' && $string{0} <= '9'`

 Stylistically, [0] should be used in lieu of the older {0}.

 I'm thinking about ways to break this. PHP is usually really bad about
 comparing things. In this case, it's a fun one. If $string[0] is "a", then
 $string[0] >= '0' will be true. But, $string[0] <= '9' will be false. So
 it does work, but it's fairly weird string-to-number behavior.

 Is is_numeric() slower? Or maybe strpbrk?

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Ticket URL: <http://core.trac.wordpress.org/ticket/22286#comment:2>
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