lcfirst
Make a string's first character lowercase
[...] = optional ... = your value
[var $... = ]call lcfirst $val=...
Example code
<!--parser:xtscript-->
var $input = Foobar
var $output = call lcfirst $val=$input
print input = $input<br />
print output = $output
<!--/parser:xtscript-->
Show in textareaExample output
Reloadinput = Foobar
output = foobar