2020-05-02 / 3792阅 / 悠然
Determines whether the query is for an existing single page.
If the $page parameter is specified, this function will additionally check if the query is for> Conditional Tags article in the Theme Developer Handbook.
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(int|string|int[]|string[])
(Optional)
Page ID, title, slug, or array of such to check against.
Default value: ''
(bool) Whether the query is for an existing single page.