Question

I have array returned

$header_html = array(1=>array('width'=>40,
                               'sort_case'=>23,
                               'title'=>'AxA'),
                      2=>array('width'=>50,
                               'sort_case'=>7,
                               'title'=>'B2B'),
                      3=>array('width'=>100,
                               'sort_case'=>12,
                               'title'=>'C12')
                      );

I want to get new array that depend on $header_array=array(‘AxA’,’B2B’,’C12′)

for examples:

 if have $header_array=array('C12','B2B','AxA').

the new $header_html will be:

$header_html = array(
                      1=>array('width'=>100,
                               'sort_case'=>12,
                               'title'=>'C12'),                         
                      2=>array('width'=>50,
                               'sort_case'=>7,
                               'title'=>'B2B'),
                      3=>array('width'=>40,
                               'sort_case'=>23,
                               'title'=>'AxA')

                      );

and so on…

Anybody know how to do this?

Answer 1

You can sort the array with a custom comparison function using usort:

function cmp($a, $b) {
  // Sort via $a['title'] and $b['title']
}

usort($header_html, 'cmp');

The trick is coming up with a comparison function that does what you want. To simply sort backwards by title, you could use:

function cmp($a, $b) {
  if ($a['title'] == $b['title'])
    return 0;

  // usually return -1 if $a < $b, but we're sorting backwards 
  return ($a['title'] < $b['title'] ? 1 : -1;
}