数据表行选择 - PHP 5.2上的匿名函数

Question

I'm using this Datatables example, on my server with a PHP version 5.2.

I know anonymous functions cannot be used, like the 'Server-side script' in the example on line 35, but I need some kind of solution for that, since I can't upgrade my server.

This is the problem:

array( 'db' => '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; }),

Does any one have a solution for that function($d, $row)?

Answer 1

'Maybe you can use array_map:

array_map("function", array('db' => 'id', ...)),

then define function to do what you want to the 'formatter' element, but leaving all other elements as is.

I'll try to elaborate, here is the suggested code (I'm assuming that only $d is an integer, if not there may be another recognizer you could use instead of is_int()):

array_map(
  function($val) {$val = is_int($val) ? 'row_'.$d : $val}, 
  array('db' => 'id', 'dt' => 'DT_RowId','formatter' => $d)
)

Depending on which php version you are using, you may have to define a non-anonymous function.

Here is a working example which should work in 5.2:

<?php
  $d = 10;

  function func($val) {
    return is_int($val) ? 'row_'.$val : $val;}

  print_r(array_map(     
    "func", 
    array('db' => 'id', 'dt' => 'DT_RowId','formatter' => $d)
   ));
?>

This outputs:

Array ( [db] => id [dt] => DT_RowId [formatter] => row_10 )