This regular expression checks for below rules: Must not have special characters except a dash sign Must not start with a dash sign or white space Must not end with a dash sign or white space Must not have a dash sign or white space in sequence

ผลิตภัณฑ์ส่งเสริมการขาย

8k realese

Port https://regex101.com/library/cX0pJ8 to PCRE2 (PHP >= 7.3)

to validate email

a word is anything valid within a parens (like in a function), but the function itself should not be matched a word may have a numeric at the end or the start there is no guarantee of a single space (or ANY space other than some operators)

Match all numbers from a string.

This regex will match when people ping someone or ping a group it will also match when people mention a channel for non-channel catching type use ``

frac

remove currency symbol, remove commas

String doesn't start or end with . - '

haowei.ch

smargs not margins

csc

Date2 (Notes)

e

Ejemplo del uso de grupos lookahead

Numeric value without decimal

Search for items in dot separated lists like 1 1.1 1.1.1 ... 2...

Best I could do for parsing dates spelled out as day, month name, year