RecursiveRegexIterator::__construct()

(PHP 5 >= 5.2.0, PHP 7)

Creates a new RecursiveRegexIterator

说明

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

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

RecursiveRegexIterator::ALL_MATCHES List all subdirectories and files.
<?php
$a = new RecursiveRegexIterator( new RecursiveDirectoryIterator(
'/home/songoq' ), '/mydir/i', RecursiveRegexIterator::ALL_MATCHES );
foreach( new RecursiveIteratorIterator( $a ) as $s )
{
    echo $s."\n";
}