PSR-1 is not specific about allowing multiple uppercase chars in method names, but it is common enough that I think it should be allowed.

Author: gsherwood

CodeSniffer/Standards/PSR1/ruleset.xml

@@ -40,5 +40,9 @@
  <!-- 4.3. Methods -->
 
  <!-- Method names MUST be declared in camelCase(). -->
- <rule ref="Generic.NamingConventions.CamelCapsFunctionName"/>
+ <rule ref="Generic.NamingConventions.CamelCapsFunctionName">
+  <properties>
+   <property name="strict" value="false"/>
+  </properties>
+ </rule>
 </ruleset>