How to sort a two-dimensional array using a certain key value in PHP

The sorting of a two-dimensional array in php can be implemented by multiple methods. For example, the following two-dimensional array is implemented by sorting the 'age' key value.

Two-dimensional array:

$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);
printr($arr);

Among them array_column (array, A key value in the array) is a column that represents a key value taken from a multi-dimensional array and returns a one-dimensional array;

array_multisort(array (one-dimensional array), sorting method (SOTR_ASC, SOTR_DESC), Other arrays (which can be two-dimensional) can be used to sort multiple arrays at once, or to sort multi-dimensional arrays according to one or more dimensions.

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Simple implementation method of PHP two-dimensional array sorting, PHP two-dimensional array sorting

PHP two-dimensional array sorting

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