The php tag can be used to execute raw PHP code enclosed within its opening and closing tags. The enclosed PHP code can contain Couch tags which will be fully executed to yield the final PHP code that will be eventually evaled to return the output.
Take care not to allow execution of arbitrary PHP code as this could have security implications.
<cms:php> echo( "Hello World" ); </cms:php>
<cms:set k_success2="<cms:php> echo(str_replace( \"\n\", '|', \"<cms:show k_success/>\" )); </cms:php>" />
Notice how in the last snippet above, we are using the php tag as a parameter of the set tag and how we are using the Couch show tag as a parameter of the PHP str_replace function.
Takes no parameters.
Sets no variables.