(PHP 5 >= 5.1.0, PHP 7, PHP 8)
ReflectionProperty::getDocComment — Gets the property doc comment
Gets the doc comment for a property.
This function has no parameters.
   The doc comment if it exists, otherwise false.
  
Example #1 ReflectionProperty::getDocComment() example
<?php
class Str
{
    /**
     * @var int  The length of the string
     */
    public $length = 5;
}
$prop = new ReflectionProperty('Str', 'length');
var_dump($prop->getDocComment());
?>
The above example will output something similar to:
string(53) "/**
     * @var int  The length of the string
     */"
Example #2 Multiple property declarations
If multiple property declarations are preceeded by a single doc comment, the doc comment refers to the first property only.
<?php
class Foo
{
    /** @var string */
    public $a, $b;
}
$class = new \ReflectionClass('Foo');
foreach ($class->getProperties() as $property) {
    echo $property->getName() . ': ' . var_export($property->getDocComment(), true) . PHP_EOL;
}
?>
The above example will output:
a: '/** @var string */' b: false