問(wèn)題 數(shù)組1如何 可以組合成數(shù)組2的形式？ 數(shù)組1 $a = [ [ 'tagId' => '43', 'streetName' => '錦春路', 'placecode' => '010170' ], [ 'tagId' => '44', 'streetName' => '濱湖路', 'placecode' => '010203' ], [ 'tagId' => '44', 'streetName' => '濱湖路', 'placecode' => '010204' ] ]; 打印出結(jié)果 array (size=3) 0 => array (size=3) 'tagId' => string '43' (length=2) 'streetName' => string '錦春路' (length=9) 'placecode' => string '010170' (length=6) 1 => array (size=3) 'tagId' => string '44' (length=2) 'streetName' => string '濱湖路' (length=9) 'placecode' => string '010203' (length=6) 2 => array (size=3) 'tagId' => string '44' (length=2) 'streetName' => string '濱湖路' (length=9) 'placecode' => string '010204' (length=6) 數(shù)組2 $b = [ [ 'tagId' => '43', 'streetName' => '錦春路', 'placeCodes' => ['010170'] ], [ 'tagId' => '44', 'streetName' => '濱湖路', 'placeCodes' => ['010203','010204'] ] ]; 打印出結(jié)果 array (size=2) 0 => array (size=3) 'tagId' => int 43 'streetName' => string '錦春路' (length=9) 'placeCodes' => array (size=1) 0 => string '010170' (length=6) 1 => array (size=3) 'tagId' => int 44 'streetName' => string '濱湖路' (length=9) 'placeCodes' => array (size=2) 0 => string '010203' (length=6) 1 => string '010204' (length=6)