isEmpty (Check for empty)
See also: ifEmpty, if (if, then, else), trim (Calculation expression – cutting off whitespaces)
The $isEmpty function returns true if the transferred text is empty/null.
Tooltip
Syntax: $isEmpty(text)
|
Name |
Description |
|
text |
The text, which is checked for empty. ►IMPORTANT◄ The transferred value is cleared of leading or attached whitespaces (e.g. spaces, tab, ...). Thus a value, which consists only of spaces, is considered empty. |
f the transferred text is empty, true is returned, otherwise false.
Examples: $isEmpty( ) – returns true, $isEmpty(0) returns false, $isEmpty(Hallo) returns false
Syntax
$isEmpty(text)
Parameter
|
Name |
Description |
|
text |
The text, which is checked for empty. ►IMPORTANT◄ The transferred value is cleared of leading or attached whitespaces (e.g. spaces, tab, ...). Thus a value, which consists only of spaces, is considered empty. |
Return value
If the transferred text is empty, true is returned, otherwise false.
Example
|
Syntax |
Result |
|
$isEmpty(Jonas Abend) |
false |
|
$isEmpty(0) |
false |
|
$isEmpty() |
true |
|
$isEmpty( ) |
true |
|
$isEmpty( ) |
true |