get_debug_type(): Make the example executable and semantic tags (#3755)

Author: mmalferov

reference/var/functions/get-debug-type.xml

@@ -43,7 +43,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-     Possible values for the returned string are:
+     Possible values for the returned &string; are:
 
      <informaltable>
       <tgroup cols="2">
@@ -63,7 +63,7 @@
          <entry>-</entry>
         </row>
         <row>
-         <entry>Booleans (true or false)</entry>
+         <entry>Booleans (&true; or &false;)</entry>
          <entry>
           <literal>"bool"</literal>
          </entry>
@@ -109,7 +109,7 @@
          <entry>
           <literal>"resource (closed)"</literal>
          </entry>
-         <entry>Example: A file stream after being closed with fclose.</entry>
+         <entry>Example: A file stream after being closed with <function>fclose</function>.</entry>
         </row>
         <row>
          <entry>Objects from Named Classes</entry>
@@ -124,7 +124,7 @@
           <literal>"class@anonymous"</literal> or parent class name/interface name if the class extends another class or implements an interface e.g. <literal>"Foo\Bar@anonymous"</literal>
          </entry>
          <entry>
-          Anonymous classes are those created through the $x = new class { ... } syntax
+          Anonymous classes are those created through the <code>$x = new class { ... }</code> syntax
          </entry>
         </row>
        </tbody>
@@ -142,28 +142,34 @@
     <programlisting role="php">
 <![CDATA[
 <?php
-echo get_debug_type(null) . PHP_EOL;
-echo get_debug_type(true) . PHP_EOL;
-echo get_debug_type(1) . PHP_EOL;
-echo get_debug_type(0.1) . PHP_EOL;
-echo get_debug_type("foo") . PHP_EOL;
-echo get_debug_type([]) . PHP_EOL;
+
+namespace Foo;
+
+echo get_debug_type(null), PHP_EOL;
+echo get_debug_type(true), PHP_EOL;
+echo get_debug_type(1), PHP_EOL;
+echo get_debug_type(0.1), PHP_EOL;
+echo get_debug_type("foo"), PHP_EOL;
+echo get_debug_type([]), PHP_EOL;
 
 $fp = fopen(__FILE__, 'rb');
-echo get_debug_type($fp) . PHP_EOL;
+echo get_debug_type($fp), PHP_EOL;
 
 fclose($fp);
-echo get_debug_type($fp) . PHP_EOL;
+echo get_debug_type($fp), PHP_EOL;
 
-echo get_debug_type(new stdClass) . PHP_EOL;
-echo get_debug_type(new class {}) . PHP_EOL;
+echo get_debug_type(new \stdClass), PHP_EOL;
+echo get_debug_type(new class {}), PHP_EOL;
 
-namespace Foo;
+interface A {}
+interface B {}
+class C {}
+
+echo get_debug_type(new class implements A {}), PHP_EOL;
+echo get_debug_type(new class implements A,B {}), PHP_EOL;
+echo get_debug_type(new class extends C {}), PHP_EOL;
+echo get_debug_type(new class extends C implements A {}), PHP_EOL;
 
-echo get_debug_type(new class implements A {}) . PHP_EOL;
-echo get_debug_type(new class implements A,B {}) . PHP_EOL;
-echo get_debug_type(new class extends C {}) . PHP_EOL;
-echo get_debug_type(new class extends C implements A {}) . PHP_EOL;
 ?>
 ]]>
     </programlisting>