Bool

Syntax

bool(expr)
true
false

Returns a boolean context of the expression. Bool is also interpreting string values as boolean, which is different from other places where boolean context can be used. This can be used in places where API functions return string values to represent binary values.

bool(pi) => true
bool(false) => false
bool('') => false
bool([]) => false
bool(['']) => true
bool('foo') => true
bool('false') => false
bool('nulL') => false
if('false',1,0) => true