How do you define ONLY 4 digits at the end of a string ? "aaa_sdf_jdsh_01111" would seem to me to end in four digits.

If you're saying the string must always end in an underscore followed by four digits, try testing against /_\d{4}$/.

In reply to Re: Number of digits at the end of the string by apl
in thread Number of digits at the end of the string by isha

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