The Array_column () function in PHP

The Array_column () function in PHP

PHP Array Reference Manual

To remove the Last_Name column from the recordset:

<?php//may return the array from the database $ A = array (' id ' = ' = '    5698,    ' first_name ' = ' Peter ',    ' last_name ' = > ' Griffin ',  ),  array (    ' id ' = = 4767,    ' first_name ' = ' Ben ',    ' last_name ' = ' Smith ',  ),  array (    ' id ' = = 3809,    ' first_name ' = ' Joe ',    ' last_name ' = ' Doe ')  ; $last _names = Array_column ($a, ' last_name ');p rint_r ($last _names);? >

Output:

Array (  [0] = Griffin  [1] = Smith  [2] = Doe)

Definition and usage

Array_column () returns the value of a single column in the input array.

Grammar

Array_column (Array,column_key,index_key);

Parameters

Describe

Array required. Specifies the multidimensional array (recordset) to use.

Column_key required. A column that requires a return value. Can be an integer index of the column of an indexed array, or a string key value for a column of an associative array. This parameter can also be NULL, which will return the entire array (which works well with the Index_key parameter to reset the array key).

Index_key is optional. As the column that returns the index/key of the array.

Technical details

return value:

Returns an array whose values are the values of a single column in the input array.

Remove the Last_Name column from the recordset and use the corresponding "id" column as the key value:

<?php//may return the array from the database $ A = array (' id ' = ' = '    5698,    ' first_name ' = ' Peter ',    ' last_name ' = > ' Griffin ',  ),  array (    ' id ' = = 4767,    ' first_name ' = ' Ben ',    ' last_name ' = ' Smith ',  ),  array (    ' id ' = = 3809,    ' first_name ' = ' Joe ',    ' last_name ' = ' Doe ')  ; $last _names = Array_column ($a, ' last_name ', ' id ');p rint_r ($last _names);? >

Output:

Array (  [5698] = Griffin  [4767] = Smith  [3809] = Doe)

Full PHP Array Reference manual