Question

我有一个循环，将php服务器中的每个文件显示为链接。单击该链接可使用fopen打开文件，如下所示：

  <?php
  echo"<ol>";
  if ($handle = opendir('saves/')) {
      while (false !== ($entry = readdir($handle))) {
          if ($entry != "." && $entry != "..") {
              echo '<li style"display:block"><a href="#codeword">'.$entry.'</a></li><br>';


    }
}
closedir($handle);
  } 
  echo"</ol>";
  echo'<div id="codeword">';
  $file = $entry;
  $f = fopen($entry, "r") or exit("Unable to open file!");
  // read file line by line until the end of file (feof)
  while(!feof($f))
  {
    echo fgets($f)."<br />";
  }

  fclose($f);
  echo"</div>";



  ?>

但是当我运行它时我得到了错误

fopen（）[function.fopen]：文件名不能为空

我尝试回复$entry而不是fopen，它看起来像预期的那样。所以问题可能是文件的路径。我应该使用什么文件路径。提前谢谢！

Answer 1

正如您在fopen() http://php.net/manual/en/function.fopen.php的php文档中所看到的，您的第一个参数是您的文件名。

也许您的值$entry为空或空。

Answer 2

在您发布的代码中，package it.evil.money; import java.io.IOException; import it.evil.money.dao.DatabaseManager; import it.evil.money.dao.MovimentoDao; import it.evil.money.model.*; import it.evil.money.view.*; import javafx.application.Application; import javafx.collections.*; import javafx.fxml.FXMLLoader; import javafx.scene.Scene; import javafx.scene.image.Image; import javafx.scene.layout.AnchorPane; import javafx.scene.layout.BorderPane; import javafx.stage.Modality; import javafx.stage.Stage; public class MainApp extends Application { private Stage primaryStage; private BorderPane rootLayout; private ObservableList<MovimentoBean> movimentoData = FXCollections.observableArrayList(); private MovimentoDao movimentoDao; public MainApp() { movimentoDao = new MovimentoDao(DatabaseManager.getConnection()); // Instead of use a empty bean... // movimentoData.add(new MovimentoBean()); // I get the data for db movimentoData.addAll(this.movimentoDao.getAll()); this.movimentoDao.distruttore(); } public ObservableList<MovimentoBean> getMovimentoData() { return movimentoData; } @Override public void start(Stage primaryStage) { this.primaryStage = primaryStage; this.primaryStage.setTitle("AddressApp"); this.primaryStage.getIcons().add(new Image("file:resources/images/address_book_32.png")); initRootLayout(); showMovimentoOverview(); } public void initRootLayout() { try { // Load root layout from fxml file. FXMLLoader loader = new FXMLLoader(); loader.setLocation(MainApp.class.getResource("view/RootLayout.fxml")); rootLayout = (BorderPane) loader.load(); // Show the scene containing the root layout. Scene scene = new Scene(rootLayout); primaryStage.setScene(scene); primaryStage.show(); } catch (IOException e) { e.printStackTrace(); } } public void showMovimentoOverview() { try { FXMLLoader loader = new FXMLLoader(); loader.setLocation(MainApp.class.getResource("view/MovimentoOverview.fxml")); AnchorPane personOverview = (AnchorPane) loader.load(); rootLayout.setCenter(personOverview); MovimentoOverviewController controller = loader.getController(); controller.setMainApp(this); } catch (IOException e) { e.printStackTrace(); } } public Stage getPrimaryStage() { return primaryStage; } public static void main(String[] args) { launch(args); } }始终为package it.evil.money.model; import java.time.LocalDate; import javafx.beans.property.BooleanProperty; import javafx.beans.property.ObjectProperty; import javafx.beans.property.SimpleBooleanProperty; import javafx.beans.property.SimpleObjectProperty; import javafx.beans.property.SimpleStringProperty; import javafx.beans.property.StringProperty; import java.math.BigDecimal; public class MovimentoBean { private final ObjectProperty<BigDecimal> id; private final ObjectProperty<ContoBean> conto; private final ObjectProperty<LocalDate> data; private final StringProperty valuta; private final ObjectProperty<BigDecimal> importo; private final ObjectProperty<BigDecimal> quotaTicket; private final ObjectProperty<CausaleBean> causale; private final StringProperty note; private final ObjectProperty<TipoPagamentoBean> tipoPagamento; private final ObjectProperty<TipoMovimentoBean> tipoMovimento; private final BooleanProperty spesaInComune; private final BooleanProperty spesaPerLavoro; private final ObjectProperty<BustaPagaBean> bustaPaga; private final ObjectProperty<UtenteBean> utente; private final ObjectProperty<TagBean> tag; public MovimentoBean() { this(null, null, null, null, null, null, null, null, null, null, false, false, null, null, null); } public MovimentoBean(BigDecimal id, ContoBean conto, LocalDate data, String valuta, BigDecimal importo, BigDecimal quotaTicket, CausaleBean causale, String note, TipoPagamentoBean tipoPagamento, TipoMovimentoBean tipoMovimento, boolean spesaInComune, boolean spesaPerLavoro, BustaPagaBean bustaPaga, UtenteBean utente, TagBean tag) { this.id = new SimpleObjectProperty<BigDecimal>(id); this.conto = new SimpleObjectProperty<ContoBean>(conto); this.data = new SimpleObjectProperty<LocalDate>(data); this.valuta = new SimpleStringProperty(valuta); this.importo = new SimpleObjectProperty<BigDecimal>(importo); this.quotaTicket = new SimpleObjectProperty<BigDecimal>(quotaTicket); this.causale = new SimpleObjectProperty<CausaleBean>(causale); this.note = new SimpleStringProperty(note); this.tipoPagamento = new SimpleObjectProperty<TipoPagamentoBean>(tipoPagamento); this.tipoMovimento = new SimpleObjectProperty<TipoMovimentoBean>(tipoMovimento); this.spesaInComune = new SimpleBooleanProperty(spesaInComune); this.spesaPerLavoro = new SimpleBooleanProperty(spesaPerLavoro); this.bustaPaga = new SimpleObjectProperty<BustaPagaBean>(bustaPaga); this.utente = new SimpleObjectProperty<UtenteBean>(utente); this.tag = new SimpleObjectProperty<TagBean>(tag); } public BigDecimal getId(){ return this.id.get(); } public void setId(BigDecimal id){ this.id.set(id); } public ObjectProperty<BigDecimal> idProperty(){ return id; } ......（如果它进入Exception in Application start method java.lang.reflect.InvocationTargetException ....... Caused by: java.lang.NullPointerException at it.evil.money.view.MovimentoOverviewController.setMainApp(MovimentoOverviewController.java ) at it.evil.money.MainApp.showMovimentoOverview(MainApp.java ) at it.evil.money.MainApp.start(MainApp.java )）或$entry（如果没有），则为false {1}}循环永远不会结束，直到while

fopen（）中文件名的PHP变量。文件名不能为空错误

2 个答案: