rewinddir

(PHP 4, PHP 5, PHP 7, PHP 8)

rewinddir — Regresar el gestor de directorio

Descripción

rewinddir(resource $dir_handle = ?): void

Restablece la secuencia de directorio indicada por gestor_dir al comienzo del directorio.

Parámetros

gestor_dir: El gestor de directorio tipo resource abierto previamente con opendir(). Si el gestor de directorio no se especifica, la ultima conexión abierta por opendir() es asumida.

Valores devueltos

devuelve null en caso de éxito o false en caso de error.

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User Contributed Notes 2 notes

down

osamahussain897 at gmail dot com ¶

7 years ago

/* Source Code */

<?php
$dir = "/images/";

// Open a directory, and read its contents
if (is_dir($dir)){
  if ($dh = opendir($dir)){
    // List files in images directory
    while (($file = readdir($dh)) !== false){
      echo "filename:" . $file . "<br>";
    }
    rewinddir();
    // List once again files in images directory
    while (($file = readdir($dh)) !== false){
      echo "filename:" . $file . "<br>";
    }
    closedir($dh);
  }
}
?>

/* Result */

filename: cat.gif
filename: dog.gif
filename: horse.gif
filename: cat.gif
filename: dog.gif
filename: horse.gif

down

ASchmidt at Anamera dot net ¶

7 years ago

It is crucial to note that rewinddir() does not simply start over at the beginning of the SAME directory list. Instead, this function first re-reads the directory - thus any file that were deleted (or inserted) since the original opendir() will be reflected after "rewinding".

In that respect, rewinddir() is equivalent to a closedir(), opendir() sequence, but without obtaining a new handle.

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