RegexIterator::setFlags Sets the flags &reftitle.description; public voidRegexIterator::setFlags intflags Sets the flags. &reftitle.parameters; flags The flags to set, a bitmask of class constants. The available flags are listed below. The actual meanings of these flags are described in the predefined constants. value constant 1 RegexIterator::USE_KEY &reftitle.returnvalues; &return.void; &reftitle.examples; Creates a new RegexIterator that filters all entries whose key starts with 'test'. 'test 1', 'teststr2' => 'another test', 'str3' => 'test 123'); $arrayIterator = new ArrayIterator($test); $regexIterator = new RegexIterator($arrayIterator, '/^test/'); $regexIterator->setFlags(RegexIterator::USE_KEY); foreach ($regexIterator as $key => $value) { echo $key . ' => ' . $value . "\n"; } ?> ]]> &example.outputs; another test ]]> &reftitle.seealso; RegexIterator::getFlags