HTML highlighting into PHP does not work in some cases

Hi,

I'm using latest (PHPStrom 2016.3.2).

I have this code:

echo    '<a name="testname-'.$x.'"></a>'
   .  '<div class="div-class">';

and then this code

echo    '<a '.'name="testname">'.$x.'</a>'
   .  '<div class="div-class">';

Highlighting is not working.

but this one:

echo    '<a name="testname">'.$x.'</a>'
   .  '<div '.'class="div-class">';

highlighting works just fine. For me they should be equivalent (either working or not working, preferably working:))

Any help?