Function name must be a string on Server Side Processing

baokydev

$columns = array(
    array(
        'db' => 'contact_id',
        'dt' => 'DT_RowId',
        'formatter' => function( $d, $row ) {
            // Technically a DOM id cannot start with an integer, so we prefix
            // a string. This can also be useful if you have multiple tables
            // to ensure that the id is unique with a different prefix
            return 'row_'.$d;
        }
    ),
    array( 'db' => 'contact_name', 'dt' => 'contact_name' ),
    array( 'db' => 'contact_email',  'dt' => 'contact_email' ),
    array( 'db' => 'contact_type',   'dt' => 'contact_type' )
  );

I have the code above, the error return was function name must be a string

I think it refer to this part

'formatter' => function( $d, $row ) {
                // Technically a DOM id cannot start with an integer, so we prefix
                // a string. This can also be useful if you have multiple tables
                // to ensure that the id is unique with a different prefix
                return 'row_'.$d;
            }

This code is copy from DataTable page on server processing, row detail. I just copy the exact but no idea why it return me this function name must be a string, how do I rectify this function name must be a string issue.

allan

Sounds like you might be using a very old version of PHP. An anonymous function, such as that above, requires PHP 5.3 or newer.

Allan