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<?php $code = [ 'PO/2022/0001', 'abc', 'xyz', 'PO2022/0001', 'XY/2022/0002', 'PO/2022/0232' ]; var_export( preg_filter( '~^[^/]+\K(?:/[^/]+){2}$~', '', $code ) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 'PO', 4 => 'XY', 5 => 'PO', )

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