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<?php $array = [1, 2, 3, 4]; $index = 2; $value = 9; $remains = array_splice($array, max(0, $index - 1)); var_export( array_merge( $array, [$value], $remains ) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 1, 1 => 9, 2 => 2, 3 => 3, 4 => 4, )

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