Created
January 21, 2025 04:18
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PHPのstream wrapperを自分で定義する
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| <?php | |
| class YammerCustomStreamWrapper { | |
| private $position; | |
| private $data; | |
| public $context; | |
| public function stream_open($path, $mode, $options, &$opened_path) { | |
| switch ($path) { | |
| case "yammer://me": | |
| $this->data = "yammer"; | |
| break; | |
| case "yammer://company": | |
| $this->data = "GMO Pepabo, Inc."; | |
| break; | |
| case "yammer://like": | |
| $this->data = "awk"; | |
| break; | |
| case "yammer://hobby": | |
| $this->data = "SCUBA Diving"; | |
| break; | |
| default: | |
| $this->data = ""; | |
| break; | |
| } | |
| // 独自の初期データを設定 | |
| // $this->data = "This is some example data for my custom stream."; | |
| $this->position = 0; | |
| return true; | |
| } | |
| public function stream_stat() { | |
| return []; | |
| } | |
| public function stream_read($count) { | |
| // 指定されたバイト数を読み込む | |
| $ret = substr($this->data, $this->position, $count); | |
| $this->position += strlen($ret); | |
| return $ret; | |
| } | |
| public function stream_eof() { | |
| // 終端に達したかどうかを返す | |
| return $this->position >= strlen($this->data); | |
| } | |
| public function stream_write($data) { | |
| // データを書き込む（この例ではサポートしていません） | |
| return 0; | |
| } | |
| public function stream_tell() { | |
| // 現在の位置を返す | |
| return $this->position; | |
| } | |
| public function stream_seek($offset, $whence) { | |
| // ストリーム内での位置を設定 | |
| switch ($whence) { | |
| case SEEK_SET: | |
| if ($offset < strlen($this->data) && $offset >= 0) { | |
| $this->position = $offset; | |
| return true; | |
| } | |
| return false; | |
| case SEEK_CUR: | |
| if ($offset >= 0) { | |
| $this->position += $offset; | |
| return true; | |
| } | |
| return false; | |
| case SEEK_END: | |
| if (strlen($this->data) + $offset >= 0) { | |
| $this->position = strlen($this->data) + $offset; | |
| return true; | |
| } | |
| return false; | |
| default: | |
| return false; | |
| } | |
| } | |
| public function stream_close() { | |
| // リソースが終了する際に呼び出される | |
| } | |
| } | |
| // 新しいプロトコルの登録 | |
| stream_wrapper_register("yammer", "YammerCustomStreamWrapper") | |
| or die("Failed to register protocol"); | |
| // カスタムプロトコルを使用してデータを読み込む | |
| echo 'file_get_contents("yammer://me") :'. file_get_contents("yammer://me") . "\n"; | |
| echo 'file_get_contents("yammer://company) :'. file_get_contents("yammer://company") . "\n"; | |
| echo 'file_get_contents("yammer://like") :'. file_get_contents("yammer://like") . "\n"; | |
| echo 'file_get_contents("yammer://hobby") :'. file_get_contents("yammer://hobby") . "\n"; |
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