- var_dump: documentation ( source)
<?php
$invalid = "a\x80b";
$iter = IntlBreakIterator::createCodePointInstance();
$iter->setText($invalid);
while ($iter->next() !== IntlBreakIterator::DONE) {
var_dump(
$iter->getLastCodePoint(),
$iter->getErrorCode(),
$iter->getErrorMessage()
);
}