php 二維數組 根據條件合併成新的二維數組

$arr = [ 0 => [ 'id' => 1, 'name' => '張三', 'phone' => '123456789' ], 1 => [ 'id' => 2, 'name' => '李四', 'phone' => '456789' ], 3 => [

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