(PHP 5, PHP 7, PHP 8)
streamWrapper::unlink — Delete a file
$path): boolThis method is called in response to unlink().
注意:
In order for the appropriate error message to be returned this method should not be defined if the wrapper does not support removing files.
pathThe file URL which should be deleted.
成功時(shí)返回 true， 或者在失敗時(shí)返回 false。
調(diào)用此方法失敗將給出
E_WARNING（未實(shí)現(xiàn)）。
注意:
當(dāng)合法的上下文傳遞給調(diào)用函數(shù)時(shí)，屬性 streamWrapper::$context 會(huì)被改變。