note 130291 added to recursiveiteratoriterator.getsubiterator

$testArray = [ 'a' => [ 'b' => [ 'c' => 1 ], 'd' => [ 'e' => [ 'f' => 2 ] ] ] ]; $modes = [ 'LEAVES_ONLY' => \RecursiveIteratorIterator::LEAVES_ONLY, 'SELF_FIRST' => \RecursiveIteratorIterator::SELF_FIRST, 'CHILD_FIRST' => \RecursiveIteratorIterator::CHILD_FIRST ]; function logIteratorTraversal(\RecursiveIteratorIterator $iterator, string $modeName) { $maxDepth = 0; $log = []; foreach ($iterator as $key => $value) { $currentDepth = $iterator->getDepth(); $maxDepth = max($maxDepth, $currentDepth); // 构建路径 $path = []; for ($i = 0; $i <= $currentDepth; $i++) { $sub = $iterator->getSubIterator($i); $path[] = $sub->key(); } $log[] = sprintf( "模式: %-11s | 当前深度: %d | 路径: %-16s | 类型: %s", $modeName, $currentDepth, implode('→', $path), is_array($value) ? '非叶子节点' : '叶子节点' ); } echo "=== {$modeName} 模式遍历日志 ===\n"; echo implode("\n", $log); echo "\n最大实际深度：" . ($maxDepth + 1) . "\n\n"; } foreach ($modes as $name => $mode) { $iterator = new \RecursiveIteratorIterator( new \RecursiveArrayIterator($testArray), $mode, \RecursiveIteratorIterator::CATCH_GET_CHILD ); logIteratorTraversal($iterator, $name); } === LEAVES_ONLY 模式遍历日志 === 模式: LEAVES_ONLY | 当前深度: 2 | 路径: a→b→c | 类型: 叶子节点 模式: LEAVES_ONLY | 当前深度: 3 | 路径: a→d→e→f | 类型: 叶子节点 最大实际深度：4 === SELF_FIRST 模式遍历日志 === 模式: SELF_FIRST | 当前深度: 0 | 路径: a | 类型: 非叶子节点 模式: SELF_FIRST | 当前深度: 1 | 路径: a→b | 类型: 非叶子节点 模式: SELF_FIRST | 当前深度: 2 | 路径: a→b→c | 类型: 叶子节点 模式: SELF_FIRST | 当前深度: 1 | 路径: a→d | 类型: 非叶子节点 模式: SELF_FIRST | 当前深度: 2 | 路径: a→d→e | 类型: 非叶子节点 模式: SELF_FIRST | 当前深度: 3 | 路径: a→d→e→f | 类型: 叶子节点 最大实际深度：4 === CHILD_FIRST 模式遍历日志 === 模式: CHILD_FIRST | 当前深度: 2 | 路径: a→b→c | 类型: 叶子节点 模式: CHILD_FIRST | 当前深度: 1 | 路径: a→b | 类型: 非叶子节点 模式: CHILD_FIRST | 当前深度: 3 | 路径: a→d→e→f | 类型: 叶子节点 模式: CHILD_FIRST | 当前深度: 2 | 路径: a→d→e | 类型: 非叶子节点 模式: CHILD_FIRST | 当前深度: 1 | 路径: a→d | 类型: 非叶子节点 模式: CHILD_FIRST | 当前深度: 0 | 路径: a | 类型: 非叶子节点 最大实际深度：4 ---- Server IP: 45.112.84.4 Probable Submitter: 80.90.5.137 (proxied: 39.166.18.151) ---- Manual Page -- https://php.net/manual/en/recursiveiteratoriterator.getsubiterator.php Edit -- https://main.php.net/note/edit/130291 Del: integrated -- https://main.php.net/note/delete/130291/integrated Del: useless -- https://main.php.net/note/delete/130291/useless Del: bad code -- https://main.php.net/note/delete/130291/bad+code Del: spam -- https://main.php.net/note/delete/130291/spam Del: non-english -- https://main.php.net/note/delete/130291/non-english Del: in docs -- https://main.php.net/note/delete/130291/in+docs Del: other reasons-- https://main.php.net/note/delete/130291 Reject -- https://main.php.net/note/reject/130291 Search -- https://main.php.net/manage/user-notes.php