[wp-trac] [WordPress Trac] #58943: Replace `is_a` calls in core with `instanceof`

[WordPress Trac]

#58943: Replace `is_a` calls in core with `instanceof`
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 Reporter:  ayeshrajans       |       Owner:  SergeyBiryukov
     Type:  enhancement       |      Status:  accepted
 Priority:  normal            |   Milestone:  6.4
Component:  General           |     Version:
 Severity:  trivial           |  Resolution:
 Keywords:  has-patch commit  |     Focuses:  performance, coding-standards
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Changes (by mukesh27):

 * keywords:  has-patch => has-patch commit


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Ticket URL: <https://core.trac.wordpress.org/ticket/58943#comment:14>
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