PHP - Manual: RecursiveTreeIterator

2024-11-15

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The RecursiveTreeIterator class

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

简介

Allows iterating over a RecursiveIterator to generate an ASCII graphic tree.

类摘要

class RecursiveTreeIterator extends RecursiveIteratorIterator {

/* 继承的常量 */

const int RecursiveIteratorIterator::LEAVES_ONLY = 0;

const int RecursiveIteratorIterator::SELF_FIRST = 1;

const int RecursiveIteratorIterator::CHILD_FIRST = 2;

const int RecursiveIteratorIterator::CATCH_GET_CHILD = 16;

/* 常量 */

const int BYPASS_CURRENT = 4;

const int BYPASS_KEY = 8;

const int PREFIX_LEFT = 0;

const int PREFIX_MID_HAS_NEXT = 1;

const int PREFIX_MID_LAST = 2;

const int PREFIX_END_HAS_NEXT = 3;

const int PREFIX_END_LAST = 4;

const int PREFIX_RIGHT = 5;

/* 方法 */

public __construct(
    RecursiveIterator|IteratorAggregate $iterator,
    int $flags = RecursiveTreeIterator::BYPASS_KEY,
    int $cachingIteratorFlags = CachingIterator::CATCH_GET_CHILD,
    int $mode = RecursiveTreeIterator::SELF_FIRST
)

public beginChildren(): void

public beginIteration(): RecursiveIterator

public callGetChildren(): RecursiveIterator

public callHasChildren(): bool

public current(): mixed

public endChildren(): void

public endIteration(): void

public getEntry(): string

public getPostfix(): string

public getPrefix(): string

public key(): mixed

public next(): void

public nextElement(): void

public rewind(): void

public setPostfix(string $postfix): void

public setPrefixPart(int $part, string $value): void

public valid(): bool

/* 继承的方法 */

public RecursiveIteratorIterator::beginChildren(): void

public RecursiveIteratorIterator::beginIteration(): void

public RecursiveIteratorIterator::callGetChildren(): ?RecursiveIterator

public RecursiveIteratorIterator::callHasChildren(): bool

public RecursiveIteratorIterator::current(): mixed

public RecursiveIteratorIterator::endChildren(): void

public RecursiveIteratorIterator::endIteration(): void

public RecursiveIteratorIterator::getDepth(): int

public RecursiveIteratorIterator::getInnerIterator(): RecursiveIterator

public RecursiveIteratorIterator::getMaxDepth(): int|false

public RecursiveIteratorIterator::getSubIterator(?int $level = null): ?RecursiveIterator

public RecursiveIteratorIterator::key(): mixed

public RecursiveIteratorIterator::next(): void

public RecursiveIteratorIterator::nextElement(): void

public RecursiveIteratorIterator::rewind(): void

public RecursiveIteratorIterator::setMaxDepth(int $maxDepth = -1): void

public RecursiveIteratorIterator::valid(): bool

}

预定义常量

RecursiveTreeIterator::BYPASS_CURRENT
RecursiveTreeIterator::BYPASS_KEY
RecursiveTreeIterator::PREFIX_LEFT
RecursiveTreeIterator::PREFIX_MID_HAS_NEXT
RecursiveTreeIterator::PREFIX_MID_LAST
RecursiveTreeIterator::PREFIX_END_HAS_NEXT
RecursiveTreeIterator::PREFIX_END_LAST
RecursiveTreeIterator::PREFIX_RIGHT

RecursiveTreeIterator::beginChildren — Begin children
RecursiveTreeIterator::beginIteration — Begin iteration
RecursiveTreeIterator::callGetChildren — Get children
RecursiveTreeIterator::callHasChildren — Has children
RecursiveTreeIterator::__construct — Construct a RecursiveTreeIterator
RecursiveTreeIterator::current — Get current element
RecursiveTreeIterator::endChildren — End children
RecursiveTreeIterator::endIteration — End iteration
RecursiveTreeIterator::getEntry — Get current entry
RecursiveTreeIterator::getPostfix — Get the postfix
RecursiveTreeIterator::getPrefix — Get the prefix
RecursiveTreeIterator::key — Get the key of the current element
RecursiveTreeIterator::next — Move to next element
RecursiveTreeIterator::nextElement — Next element
RecursiveTreeIterator::rewind — Rewind iterator
RecursiveTreeIterator::setPostfix — Set postfix
RecursiveTreeIterator::setPrefixPart — Set a part of the prefix
RecursiveTreeIterator::valid — Check validity

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User Contributed Notes 1 note

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matthieu88160 ¶

5 years ago


$it = new RecursiveArrayIterator(array(1, 2, array(3, 4, array(5, 6, 7), 8), 9, 10));
$tit = new RecursiveTreeIterator($it);

foreach( $tit as $key => $value ){
    echo $value . PHP_EOL;
}

/* Will output

|-1
|-2
|-Array
| |-3
| |-4
| |-Array
| | |-5
| | |-6
| | \-7
| \-8
|-9
\-10

*/

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官方地址：https://www.php.net/manual/en/class.recursivetreeiterator.php

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The RecursiveTreeIterator class

简介

类摘要

预定义常量

目录

User Contributed Notes 1 note