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<?php var_dump([ 'array_unique' => array_unique([0, false, 0]), 'double flip' => array_flip(array_flip([0, false, 0])), ]);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: array_flip(): Can only flip string and integer values, entry skipped in /in/vKUNm on line 5 array(2) { ["array_unique"]=> array(2) { [0]=> int(0) [1]=> bool(false) } ["double flip"]=> array(1) { [2]=> int(0) } }

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