Functions are small autonomous programs that "take in" some data as parameters, process it and return a resulting value. You can use functions to compute values of the variables or to condition bot answers to create complex dialogue flows. Here you can find a reference of currently supported functions with examples for the use in conditions.
length($string$)
Returns the length of the given $string$.
- Example: length ($pw$) == 8
the condition checks whether $pw$ consists of exactly 8 characters
substr ($string$, $start$, $length$)
Returns the part of a string $string$ defined by $start$ (integer) and $length (integer) parameters. $string$ can be of type "text", "word" or "number".
- Example:
substr ($profile_number$, 0, 2) == "49"
checks if a user’s profile number starts with "49"
round($number$, $precision$)
Returns the rounded value of $number$ to specified $precision$ (number of digits after the decimal point). $precision$ can also be negative or zero (default). If $precision$ is negative the rounding will occur before the decimal point.
- Example: round ($age$, 0) >= 18
checks whether rounded $age$ equals or is greater than 18
floor($number$)
Returns the next lowest integer value by rounding down $number$ if necessary.
- Example: $number$ – floor($number$) == 0
the compound condition checks whether $number$ is an integer
ceil($number$)
Returns the next highest integer value by rounding up $number$.
- Example: ceil ($number$) == 1
checks if $number$ rounded up is 1
abs($number$)
Returns the absolute value of $number$.
- Example: abs($number$) < 10
checks if absolute value of $number$ is smaller than 10
in_array($string$,$array$)
Checks if $string$ is an element of the collection $array$ and returns 1 if true.
- Example:
in_array ("red", $preferred_colors$)
checks if colour “red“ is saved in the collection $favourite_colors$
preg_match("/$pattern$/", $string$)Searches $string$ for a match to the regular expression $pattern$. Returns 1 in case of a match and 0 in case of no match. Please make sure to embed the regular expression in "/ and /" ("/$pattern$/").
- Example:
preg_match("/^[a-zA-Z0-9_\-\.]+@[a-zA-Z0-9_\-\.]+\.[a-zA-Z]{2,5}$/", $email$) == 1
checks whether $email$ has a valid format
Temporal functions with example usage in conditions
now()
Returns current Unix Timestamp (number of seconds from 01. January 1970 00:00:00 UTC)
- Example:now() <= 1541526600
checks if the timestamp of NOW is smaller than (the timestamp of) 11/06/2018 5:50pm (UTC)
today()
Returns Unix timestamp of 0 a.m. of today’s date in the channel time zone (defined in channel settings) in seconds. A comparison with a date in the format DD.MM.YYYY or MM/DD/YYY is allowed in conditions.
- Example: today() == 01.01.2026
checks if it is 01.01.2026
now() – today ()
Returns current time in the channel timezone in seconds.
- Example: now() – today() < 43200
checks whether it is forenoon (12 hours in seconds = 43200)
to_seconds($time$)
transforms $time$ inputted as hh:mm to seconds.
- Example:
now()-today() < to_seconds("12:00")
checks whether it is forenoon
yesterday()
Returns timestamp of yesterday at the same time (computed as now() – 24*3600). A comparison with a date in the format DD.MM.YYYY or MM/DD/YYY is allowed in conditions.
- Example: yesterday() == 31.12.2025
checks whether yesterday’s date was 31.12.2025
tomorrow()
Returns timestamp of tomorrow at the same time (computed as now() + 24*3600). A comparison with a date in the format DD.MM.YYYY or MM/DD/YYY is allowed in conditions.
- Example: tomorrow() == 02.01.2025
checks tomorrow is 02.01.2025
weekday()
returns current weekday (1-7 for Monday-Sunday)
- Example: weekday() == 7
checks it if is Sunday today
month()
returns current month
- Example: month() == 6
checks if it is June
day()
Returns current day of the month
- Example: day() == 20
compound conditions checks if it is 20th June.
unix_timestamp(time)
The function expects to be given a string containing an English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC)
time_format($format$, $timestamp$)
Returns time formatted according to the string in $format$ using the given integer $timestamp$ or the current time if no timestamp is given.
The followings characters are recognized in the format parameter string:
- Example:
$time=(time_format("H:i"))$
here current time is in a format hh:mm is passed to the variable $time$ (type "text").
Time_format() function is based on the php date() function. Please find its description and a comprehensive list of formatting options here.
