array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'it', ), 'this' => array ( 0 => 'function.posix-access.php', 1 => 'posix_access', 2 => 'Determine accessibility of a file', ), 'up' => array ( 0 => 'ref.posix.php', 1 => 'POSIX Funzioni', ), 'prev' => array ( 0 => 'ref.posix.php', 1 => 'POSIX Funzioni', ), 'next' => array ( 0 => 'function.posix-ctermid.php', 1 => 'posix_ctermid', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/posix/functions/posix-access.xml', ), 'history' => array ( ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); contributors($setup); ?>

posix_access

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

posix_access — Determine accessibility of a file

Descrizione

posix_access(string $filename, int $flags = 0): bool

posix_access() checks the user's permission of a file.

Elenco dei parametri

filename

The name of the file to be tested.

flags

A mask consisting of one or more of POSIX_F_OK, POSIX_R_OK, POSIX_W_OK and POSIX_X_OK.

POSIX_R_OK, POSIX_W_OK and POSIX_X_OK request checking whether the file exists and has read, write and execute permissions, respectively. POSIX_F_OK just requests checking for the existence of the file.

Valori restituiti

Restituisce true in caso di successo, false in caso di fallimento.

Esempi

Example #1 posix_access() example

This example will check if the $file is readable and writable, otherwise will print an error message.

<?php

$file = 'some_file';

if (posix_access($file, POSIX_R_OK | POSIX_W_OK)) {
echo 'The file is readable and writable!';

} else {
$error = posix_get_last_error();

echo "Error $error: " . posix_strerror($error);
}

?>

Vedere anche: