allow certain characters to be entered

[Egor_Varaksa]

How can I make it so that only English letters and numbers can be entered in the guiCreateEdit field?

Edited January 17, 2022 by Egor_Varaksa

[The_GTA]

Hello Egor_Varaksa,

I suggest you try playing around with the onClientGUIChanged event. Use the guiGetText function to fetch the current content of the editbox. If the current text contains any invalid characters then reset it to the previous text. You should try using the utf8.find function to check for validity of the text. Basically, if the entire content matches against your pattern (start index = 1, end index = #content) then it does match your language requirements.

[Egor_Varaksa]

Do I need to create a table with forbidden characters? If so, it will take a long time. Is it possible, on the contrary, to create a table with only allowed characters?

[The_GTA]

Please take a look at the lua-users.org Patterns tutorial page. If you want to match for only the string of 'abc' characters then you can do...

local beg, term = utf8.find("aaaaabbbbbcccc", "[abc]*");