OS - setting the contact field PREG expression to check the value of the field

[quote] Maria OneBox production Employee wrote: You can enter a regular expression in this field. Before the new value is stored in the field, it will be checked, and if it does not fit the given condition, an error will be generated for example, in the "PREG expression for checking the field value" is written: /number\s+number\d+/uis for the value "number 1" - there will be an error, and for the value "number No. 1" - there will be no error and the value will be written in an additional field This setting is not only in the additional fields of the contact, but also for the additional field of the process and the additional fields of the product of the process have this setting [/quote] Thank you, Masha now to try where can I see the rules for writing PREG templates in OneBox?

This field uses regular regular expressions. You can use https://regex101.com/ to test your expressions In places where non-standard PREG expressions are used (for example, the Turn a letter into a process action), an explanation about the use is indicated next to

[quote] Maria OneBox production Employee wrote: This field uses regular regular expressions. You can use https://regex101.com/ to test your expressions In places where non-standard PREG expressions are used (for example, the Turn a letter into a process action), an explanation about the use is indicated next to [/quote] Thanks!