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<?php $a = [[1, 2], [1, 2]]; $a["b"] = [1, 3]; $a["a"] = [1, 3]; array_unshift($a, [3, 4]); print_r($a);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => 3 [1] => 4 ) [1] => Array ( [0] => 1 [1] => 2 ) [2] => Array ( [0] => 1 [1] => 2 ) [b] => Array ( [0] => 1 [1] => 3 ) [a] => Array ( [0] => 1 [1] => 3 ) )

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