Php/docs/recursiveregexiterator.construct

• PHP Manual
• RecursiveRegexIterator
• Creates a new RecursiveRegexIterator

RecursiveRegexIterator::__construct

(PHP 5 >= 5.2.0, PHP 7)

RecursiveRegexIterator::__construct — Creates a new RecursiveRegexIterator

说明

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

Creates a new regular expression iterator.

参数

iterator

The recursive 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
RecursiveRegexIterator::ALL_MATCHES	See preg_match_all().
RecursiveRegexIterator::GET_MATCH	See preg_match().
RecursiveRegexIterator::MATCH	See preg_match().
RecursiveRegexIterator::REPLACE	none.
RecursiveRegexIterator::SPLIT	See preg_split().

范例

Example #1 RecursiveRegexIterator::__construct() example

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

<?php$rArrayIterator = new RecursiveArrayIterator(array('test1', array('tet3', 'test4', 'test5')));$rRegexIterator = new RecursiveRegexIterator($rArrayIterator, '/^test/',    RecursiveRegexIterator::ALL_MATCHES);foreach ($rRegexIterator as $key1 => $value1) {    if ($rRegexIterator->hasChildren()) {        // print all children        echo "Children: ";        foreach ($rRegexIterator->getChildren() as $key => $value) {            echo $value . " ";        }        echo "\n";    } else {        echo "No children\n";    }}?>

以上例程的输出类似于：

No children
Children: test4 test5

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