echo TRUE will display 1, why echo FALSE will display nothing, even though FALSE is a boolean 0?

    there's a user notes about it here:
    Booleans

    i always use var_dump() for checking value types anyway.

      It's also explicitly spelled out on the "Strings" page of the manual:

      Converting to String

      A value can be converted to a string using the (string) cast or the strval() function. String conversion is automatically done in the scope of an expression where a string is needed. This happens when using the echo() or print() functions, or when a variable is compared to a string . The sections on Types and Type Juggling will make the following clearer. See also the settype() function.

      A boolean TRUE value is converted to the string "1". Boolean FALSE is converted to "" (the empty string). This allows conversion back and forth between boolean and string values.

      PS: true is not a Boolean 1 and false is not a Boolean 0; true is a boolean true and false is a boolean false. 🙂

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