//Function defined inside else -> doesn't work

if(isset($_GET['add'])) {
// ......
}
else {
  //PEAR 
  //....
  //Add a colum to a datagrid and use the callback function "printEditDeleteLink"
  $column[] = new Structures_DataGrid_Column('Action', null, null, array('align' => 'center'),   null, 'printEditDeleteLink');
  function printEditDeleteLink($p) {
	return 	'<a href="'.$_SERVER['PHP_SELF'].'?edit_zone='.$p['record']['id_zone'].'">Edit.</a>'
			.'&nbsp;'.'<a href="'.$_SERVER['PHP_SELF'].'?delete_zone='.$p['record']['id_zone'].'">Del.</a>';
  }

}

//Function defined outside if/else -> work

  function printEditDeleteLink($p) {
	return 	'<a href="'.$_SERVER['PHP_SELF'].'?edit_zone='.$p['record']['id_zone'].'">Edit.</a>'
			.'&nbsp;'.'<a href="'.$_SERVER['PHP_SELF'].'?delete_zone='.$p['record']['id_zone'].'">Del.</a>';
  }

if(isset($_GET['add'])) {
// ......
}
else {
  //PEAR 
  //....
  //Add a colum to a datagrid and use the callback function "printEditDeleteLink"
  $column[] = new Structures_DataGrid_Column('Action', null, null, array('align' => 'center'),   null, 'printEditDeleteLink');


}