HTML tweaks

Doc/Manual/Php.html

@@ -142,6 +142,7 @@ least work for Linux though):
 
 <H3><a name="Php_nn1_3"></a>34.1.2 Using PHP Extensions</H3>
 
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 <p>
 To test the extension from a PHP script, you first need to tell PHP to
 load it.  To do this, add a line like this to the <tt>[PHP]</tt> section of
@@ -773,6 +774,7 @@ Ko::threats();
 
 <H4><a name="Php_nn2_6_5"></a>34.2.6.5 Specifying Implemented Interfaces</H4>
 
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 <p>
 PHP supports the concept of abstract interfaces which a class can implement.
 Since SWIG 3.0.3, you can tell SWIG that a wrapped class (for example