- PHP 手册
- 函数参考
- 其它基本扩展
- SPL
- 迭代器
- RegexIterator
RegexIterator::__construct
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
RegexIterator::__construct — Create a new RegexIterator
说明
public RegexIterator::__construct(Iterator
$iterator,string
$pattern,int
$mode = RegexIterator::MATCH,int
$flags = 0,int
$pregFlags = 0)
Create a new RegexIterator which filters an Iterator using a regular expression.
参数
-
iterator -
The iterator to apply this regex filter to.
-
pattern -
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.
-
pregFlags -
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().
错误／异常
Throws an InvalidArgumentException if the pattern argument is invalid.
范例
示例 #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";
}
?>
以上例程的输出类似于：
test 1 test 123
参见
- preg_match() - 执行匹配正则表达式
- preg_match_all() - 执行一个全局正则表达式匹配
- preg_replace() - 执行一个正则表达式的搜索和替换
- preg_split() - 通过一个正则表达式分隔字符串
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/regexiterator.construct.php