Specifications

echo “<a href=\”filedetails.php?file=”.$file.”\”>”.$file.”</a><br>”;

}

We can then create the script filedetails.php to provide further information about a file. The

contents of this file are shown in Listing 16.4.

One warning about this script: Some of the functions used here are not supported under

Windows, including fileowner() and filegroup(), or are not supported reliably.

LISTING 16.4 filedetails.php—File Status Functions and Their Results

<html>

<head>

<title>File Details</title>

</head>

<body>

$current_dir = “/home/book/uploads/”;

$file = basename($file); // strip off directory information for security

echo “<h1>Details of file: “.$file.”</h1>”;

$file = $current_dir.$file;

echo “<h2>File data</h2>”;

echo “File last accessed: “.date(“j F Y H:i”, fileatime($file)).”<br>”;

echo “File last modified: “.date(“j F Y H:i”, filemtime($file)).”<br>”;

$user = posix_getpwuid(fileowner($file));

echo “File owner: “.$user[“name”].”<br>”;

$group = posix_getgrgid(filegroup($file));

echo “File group: “.$group[“name”].”<br>”;

echo “File permissions: “.decoct(fileperms($file)).”<br>”;

echo “File type: “.filetype($file).”<br>”;

echo “File size: “.filesize($file).” bytes<br>”;

echo “<h2>File tests</h2>”;

echo “is_dir: “.(is_dir($file)? “true” : “false”).”<br>”;

echo “is_executable: “.(is_executable($file)? “true” : “false”).”<br>”;

echo “is_file: “.(is_file($file)? “true” : “false”).”<br>”;

echo “is_link: “.(is_link($file)? “true” : “false”).”<br>”;

echo “is_readable: “.(is_readable($file)? “true” : “false”).”<br>”;

echo “is_writable: “.(is_writable($file)? “true” : ”false”).”<br>”;

Advanced PHP Techniques

ART IV

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