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(PHP 5)

posix_access --  Determine accessibility of a file

Description

bool posix_access ( string file [, int mode] )

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

Parameters

file

The name of the file to be tested.

mode

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

Return Values

Returns TRUE on success or FALSE on failure.

Examples

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);
}

?>

Related Function(s)

posix_get_last_error()

posix_strerror()