anchor.diff:      php_cos/3,
       php_cosh/3,
       php_pow/4,
  -    base_convert/5
  +    base_convert/5,
  +    pi/2
   ]).
   
   -include("ephp.hrl").
  
positive.code: 
  base_convert(Context, Line, {Var, Other}, From, To) ->
      base_convert(Context, Line, {Var, ephp_data:to_bin(Other)}, From, To).
  
negative.code:     {php_tan, [{alias, <<"tan">>}]},
      {php_tanh, [{alias, <<"tanh">>}]},
      {php_pow, [{alias, <<"pow">>}]},
      base_convert,
      pi
  ].
  
  -spec init_config() -> ephp_func:php_config_results().
  