Basics of regex number matching .htaccess

[0-9]* matches zero or more of any number e.g.,
[0-9]+ matches one or more of any number e.g., 123
[0-9]{8} matches any 8 numbers e.g., 12345678
[0-9]{8,} matches any 8 or more numbers e.g., 1234567890
[0-9]{0,8} matches any number 0-8 times e.g., 123456
[0-9]{4,8} matches any number 4-8 times e.g., 1234
[5] matches the number 5 one time e.g., 5
[5]+ matches the number 5 one or more times e.g., 555
[5-9]{2} matches any numbers 5-9 two times e.g., 56
[5-9]{0,4} matches any numbers 5-9 four times e.g., 5678
[5-9]{4,8} matches any numbers 5-9 4-8 times e.g., 56789567

ดูเพิ่มเติมที่ลิ้งค์ด้านล่างนี้
https://perishablepress.com/redirecting-urls-numbers/