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<?php $a = [ 23 => [ 'foo' ], 42 => 'bar', ]; var_dump( filter_var( $a, FILTER_UNSAFE_RAW, null ) );
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: filter_var(): Passing null to parameter #3 ($options) of type array|int is deprecated in /in/gZplC on line 7 bool(false)

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