RegexIterator::__construct

(PHP 5 >= 5.2.0, PHP 7)

RegexIterator::__construct — Create a new RegexIterator

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public RegexIterator::__construct ( Iterator $iterator , string $regex [, int $mode = self::MATCH [, int $flags = 0 [, int $preg_flags = 0 ]]] )

Create a new RegexIterator which filters an Iterator using a regular expression.

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iterator

The iterator to apply this regex filter to.

regex

The regular expression to match.

mode

Operation mode, see RegexIterator::setMode() for a list of modes.

flags

Special flags, see RegexIterator::setFlags() for a list of available flags.

preg_flags

The regular expression flags. These flags depend on the operation mode parameter:

RegexIterator preg_flags
operation mode available flags
RegexIterator::ALL_MATCHES See preg_match_all().
RegexIterator::GET_MATCH See preg_match().
RegexIterator::MATCH See preg_match().
RegexIterator::REPLACE none.
RegexIterator::SPLIT See preg_split().

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Throws an InvalidArgumentException if the regex argument is invalid.

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Example #1 RegexIterator::__construct() example

Creates a new RegexIterator that filters all strings that start with 'test'.

<?php
$arrayIterator = new ArrayIterator(array('test 1', 'another test', 'test 123'));
$regexIterator = new RegexIterator($arrayIterator, '/^test/');

foreach ($regexIterator as $value) {
    echo $value . "\n";
}
?>

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test 1
test 123

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  • preg_match() - ִ��ƥ��������ʽ
  • preg_match_all() - ִ��һ��ȫ��������ʽƥ��
  • preg_replace() - ִ��һ��������ʽ���������滻
  • preg_split() - ͨ��һ��������ʽ�ָ��ַ���