[wp-trac] [WordPress Trac] #57067: Replace certain `array_key_exists()` calls with `isset()` once PHP requirement is raised to 7.0+

[WordPress Trac]

#57067: Replace certain `array_key_exists()` calls with `isset()` once PHP
requirement is raised to 7.0+
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 Reporter:  flixos90          |       Owner:  flixos90
     Type:  enhancement       |      Status:  closed
 Priority:  normal            |   Milestone:  6.4
Component:  Themes            |     Version:
 Severity:  normal            |  Resolution:  fixed
 Keywords:  has-patch commit  |     Focuses:  performance
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Changes (by spacedmonkey):

 * keywords:  has-patch commit needs-dev-note => has-patch commit


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Ticket URL: <https://core.trac.wordpress.org/ticket/57067#comment:19>
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