Option :: isTrue - Check option value for true
The function checks, whether the option value is true or not. The function returns true , when the option value is defined as one of the following case insensitive string values:
true, yes, ja, t, y, j, 1
When this is not the case or the option value has not been set, the function returns false .
Return value: Success ( bool )
The value is true when the function was executed successfully. Otherwise the value is set to false .