How PHP uses a key value to sort two-dimensional arrays

The ordering of a two-dimensional array in PHP can be implemented in several ways, such as a two-dimensional array below that is sorted by the ' age ' key value.

Two-dimensional arrays:

$arr =[    Array (                ' name ' = ' A ',                ' age ' =>28    ),    Array (            ' name ' = ' = ' B ',            ' age ' =>14    ), Array (            ' name ' = = ' C ',            ' age ' =>59    ),    Array (            ' name ' = = ' D ', ' Age            ' =>23    ),    Array (            ' name ' = ' E ',            ' age ' =>23    ),    Array (            ' name ' = ' = ' F ',            ' Age ' =>21    ),];

Sort by ' age ' key value:

Array_multisort (Array_column ($arr, ' age '), Sort_desc, $arr);p rintr ($arr);

where Array_column (an array, a key value in an array) is a single-dimensional array that represents a column that takes a key value out of a multidimensional array;

Array_multisort (Array (one-dimensional arrays), sort (SOTR_ASC,SOTR_DESC), other arrays (which can be two-dimensional) can be used to sort multiple arrays at once, or to sort multidimensional arrays based on one dimension or multidimensional.