这个使用php if if else的函数有什么问题？

Question

I have this code but is not working and I don't know why...

function link_next($local_id, $link_type) {
  if ( !is_numeric($local_id) )      die(); 
  elseif ($link_type = 'a-href')   { $something = 'a-href'; }
  elseif ($link_type = 'link-rel') { $something = 'link-rel'; }
  else                             { $something = 'blablabla'; } 

  return $local_id.'-'.$something;
} 

$id ='14678';
echo link_next($id, 'link-rel');

// edit

The function always display 14678-a-href

Answer 1

you are using = in condition checking. You need to use == or === (strict comparison)