Highlight PHP Source Code
The PHP language has two modes. It can either be used as a standalone language (pure mode) or it can be mixed with HTML (mixed mode) by putting it inside PHP tags (a form that resembles an XML processing instruction). This presents some challenges for the syntax highlighter.
If the code in the source block is pure PHP, you should use the language tag
[source,php] ---- echo "Hello, World!"; ----
If the PHP source is mixed with HTML, you should either use the language tag
html+php, as shown here:
[source,html+php] ---- <p> <?php echo "Hello, World!"; ?> </p> ----
Or you should use the language tag
php and set the
mixed option on the source block, as shown here:
[source%mixed,php] ---- <p> <?php echo "Hello, World!"; ?> </p> ----
Under the covers, the syntax highlighter is configured to assume an implicit start PHP tag is present when the language tag is
mixed option and the language tag
html+php disable this setting.