Array Format Conversion

Array Format Conversion

<? PHP
 / * ** 
 * collation array conversion 
 * $ arr converted into the format $ b 
 * by means of a predetermined cycle must be built-in function 
 * * / 
$ arr = [ 
    [ 'name' => 'Jack', 'Hobby '=>' watermelon '], 
    [ ' name '=>' Jack ',' Hobby '=>' melon '], 
    [ ' name '=>' Rose ',' Hobby '=>' papain '], 
    [ ' name '=>' rose ', ' hobby '=>' melon '], 
    [ ' name '=>' Jack ',' Hobby '=>' sweet potatoes '], 
    [ ' name '=>' Rose ',' Hobby '=>' melon ' ] 
];

B $ = [ 'name' => 'Jack', 'Hobby' => [ 'watermelon', 'melon', 'sweet potato' ]]; 

$ arr2 is = [];
 the foreach ( $ ARR AS  $ K => $ V ) {
     $ COL = array_column ( $ arr2 is , 'name'); // get all keys specified key 
    IF ! ( the in_array ( $ V [ 'name'], $ COL )) {
         arr2 is $ [] = [ 'name' => $ V [ 'name' ]]; 
    } 
    $ COL = array_column ( $ arr2 is , 'name'); // get all keys specified key again 
    $ col_key = the array_search ( V $ [ 'name'], $ COL ); // Find the index keys in accordance with 
    $ arr2 is [ $ col_key] [ 'Hobby'] [] = $ V [ 'Hobby']; // into an array 
}
 echo '<pre />' ;
 var_dump ( $ arr2 is );