View file core/libs/htmlParser/phpcompatibility.xml

<?xml version="1.0" encoding="UTF-8"?>
<ruleset name="PHPCompatibility">
  <description>Defines rules for PHPCompatibility</description>
  <exclude-pattern>./app</exclude-pattern>
  <exclude-pattern>./example</exclude-pattern>
  <exclude-pattern>./manual</exclude-pattern>
  <exclude-pattern>./testcase</exclude-pattern>
  <exclude-pattern>./tests</exclude-pattern>
  <config name="testVersion" value="5.6"/>
  <rule ref="PHPCompatibility" />
</ruleset>