What does the PHP syntax $var1->$var2 mean?

itemprop="text">

What is the explanation for the
following syntax?

$var1->$var2
            // Note the second $

class="post-text" itemprop="text">

class="normal">Answer

You are
calling a property on $var1 that is named the same as the value
of $var2.

For
example:

$var2 =
            "name";

// The following are
            equivalent
$var1->name;
$var1->$var2;