PHP Conference Japan 2024

    RecursiveFilterIterator 类

    (PHP 5 >= 5.1.0, PHP 7, PHP 8)

    简介

    此抽象迭代器会过滤掉 RecursiveIterator 中不需要的值。此类应被扩展以实现自定义过滤器。子类必须实现 RecursiveFilterIterator::accept()。

    类概要

    abstract class RecursiveFilterIterator extends FilterIterator implements RecursiveIterator {
    /* 方法 */
    public __construct(RecursiveIterator $iterator)
    public getChildren(): ?RecursiveFilterIterator
    public hasChildren(): bool
    /* 继承的方法 */
    public FilterIterator::accept(): bool
    public FilterIterator::current(): mixed
    public FilterIterator::key(): mixed
    public FilterIterator::next(): void
    public FilterIterator::rewind(): void
    public FilterIterator::valid(): bool
    public IteratorIterator::current(): mixed
    public IteratorIterator::getInnerIterator(): ?Iterator
    public IteratorIterator::key(): mixed
    public IteratorIterator::next(): void
    public IteratorIterator::rewind(): void
    public IteratorIterator::valid(): bool
    }

    目录

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    ＋添加注释

    用户贡献的注释 2 条注释

    9
    lemats
    13 年前
    递归目录/文件列表，过滤“ .svn”

    <?php

    class MyRecursiveFilterIterator extends RecursiveFilterIterator {

    public static     $FILTERS = array(
    '.svn',
    );

    public function     accept() {
    return !    in_array(
    $this->current()->getFilename(),
    self::$FILTERS,
    true
    );
    }

    }

    $dirItr = new RecursiveDirectoryIterator('/sample/path');
    $filterItr = new MyRecursiveFilterIterator($dirItr);
    $itr = new RecursiveIteratorIterator($filterItr, RecursiveIteratorIterator::SELF_FIRST);
    foreach (    $itr as $filePath => $fileInfo) {
    echo     $fileInfo->getFilename() . PHP_EOL;
    }

    ?>
    4
    Russell Dias
    14 年前
    我必须创建一个过滤器来获取多维数组中大于某个数字的值。

    希望其他人能发现它有用

    <?php
    类 GreaterThanFilter 扩展 RecursiveFilterIterator {
    protected     $limit;

    public function     __construct(RecursiveIterator $recursiveIter, $limit) {
    $this->limit = $limit;
    parent::__construct($recursiveIter);
    }
    public function     accept() {
    return     $this->hasChildren() || strlen($this->current()) >= $this->limit;
    }
    public function     getChildren() {
    return new     self($this->getInnerIterator()->getChildren(), $this->limit);
    }
    }
    $iter = new RecursiveArrayIterator($array);
    $filter = new GreaterThanFilter($iter, 5);

    foreach(new     RecursiveIteratorIterator($filter) as $key => $value)
    {
    echo     $value . "\n";
    }
    ?>
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