- var_dump: documentation ( source)
<?php
$iteratorx = IntlCodePointBreakIterator::createCodePointInstance();
$iteratorx->setText("abc");
$iterator = $iteratorx->getPartsIterator();
$iterator->rewind();
$iterator->next();
$iteratorx->previous(); // previous works
$iterator->next();
$iterator->next();
echo $iterator->current() . "\n"; // c... all fine
$iterator->next(); // no more code points, so it's invalid
var_dump($iterator->valid()); // false
var_dump($iterator->current()); // prints weird stuff... whatever...
$iteratorx->previous(); // cannot go back
var_dump($iterator->valid()); // broken
var_dump($iterator->current()); // broken