Output Handler Return Values

The return value of the output handler is internally coerced into a string following standard PHP type semantics, with two exceptions: arrays and booleans.

Arrays are converted into the string "Array" but the Array to string conversion warning is not triggered.

If the handler returns false the contents of the buffer are returned. If the handler returns true an empty string is returned.

Note:

If a handler returns false or throws an exception its PHP_OUTPUT_HANDLER_DISABLED status flag is set.