How do I provide the second match in my regular expression and do full validation?

I have regular expressions like below. Ancak tam olarak doğru bir şekilde regex yazamadım.

keys:value,keyx:values,keyt:valus,........ OR keys:value

How can I perform an exact match both ways?

regex: (^\w+:\w+|(,))

>Solution :

For a single or multiple occurrence of the key:value parts and matching only word characters, you can match the first occurrence and optionally repeat a comma and then then same pattern using a repeating group.

^\w+:\w+(?:,\w+:\w+)*$

• ^ Start of string
• \w+:\w+ Match the first key:value occurrence
• (?:,\w+:\w+)* Optionally repeat using * a comma and again a key:value pair
• $ End of string

See the matches on regex 101.