fix PHP other notice when file cache used

Author Chris Pollett <chris@pollett.org>
Author date 2022-08-02 01:Aug:nd
Author local date 2022-08-01 18:Aug:st -0700
Committer Chris Pollett <chris@pollett.org>
Committer date 2022-08-02 01:Aug:nd
Committer local date 2022-08-01 18:Aug:st -0700
Commit 98a9be3e6fdd9cdc4ff0968be8e534609716d227
Tree dc12642d261583f6a4813f7a54e812114a3f3cf0
Parent 3bc6abb8dfa015b93279d339477f1e245115977f
fix PHP other notice when file cache used
Affected files:
src/configs/Config.php
src/models/PhraseModel.php
src/views/elements/SearchElement.php
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