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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                遍歷并過濾出不想要的值 ``` abstract FilterIterator extends IteratorIterator implements OuterIterator { /* 新增的抽象方法 */ public abstract accept ( void ) : bool -- 檢查迭代器的當前元素是否可接受 /* 重寫方法 */ public getInnerIterator ( void ) : Iterator -- 獲取內部迭代器 public __construct ( Iterator $iterator ) /* 繼承方法 */ public current ( void ) : mixed public key ( void ) : mixed public next ( void ) : void public rewind ( void ) : void public valid ( void ) : bool } ``` 例子: ``` class RecursiveFileFilterIterator extends FilterIterator { // 滿足條件的擴展名 protected $ext = array('jpg','gif'); /** * 提供 $path 并生成對應的目錄迭代器 */ public function __construct($path) { parent::__construct(new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path))); } /** * 檢查文件擴展名是否滿足條件 */ public function accept() { $item = $this->getInnerIterator(); if ($item->isFile() && in_array(pathinfo($item->getFilename(), PATHINFO_EXTENSION), $this->ext)) { return TRUE; } } } ```
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