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<?php $str_arr = Array ( 0 => Array ( 'street' => 'Erste Strasse', 'street_id' => 1 ), 1 => Array ( 'street' => 'llll', 'street_id' => 2 ) ); #echo $str_arr[array_keys($str_arr)['lalala']]; echo array_keys($str_arr)[0];
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