<?php // RAY_upload_example.php
error_reporting(E_ALL);
// MANUAL REFERENCE PAGES
// http://docs.php.net/manual/en/features.file-upload.php
// http://docs.php.net/manual/en/features.file-upload.common-pitfalls.php
// http://docs.php.net/manual/en/function.move-uploaded-file.php
// http://docs.php.net/manual/en/function.getimagesize.php
// ESTABLISH THE NAME OF THE 'uploads' DIRECTORY
$uploads = 'uploads';
// ESTABLISH THE BIGGEST FILE SIZE WE CAN ACCEPT
$max_file_size = '8192000'; // EIGHT MEGABYTE LIMIT ON UPLOADS
// ESTABLISH THE MAXIMUM NUMBER OF FILES WE CAN UPLOAD
$nf = 3;
// ESTABLISH THE KINDS OF FILE EXTENSIONS WE CAN ACCEPT
$file_exts = array
( 'jpg'
, 'gif'
, 'png'
, 'txt'
, 'pdf'
)
;
// LIST OF THE ERRORS THAT MAY BE REPORTED IN $_FILES[]["error"] (THERE IS NO #5)
$errors = array
( 0 => "Success!"
, 1 => "The uploaded file exceeds the upload_max_filesize directive in php.ini"
, 2 => "The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form"
, 3 => "The uploaded file was only partially uploaded"
, 4 => "No file was uploaded"
, 6 => "Missing a temporary folder"
, 7 => "Cannot write file to disk"
)
;
// IF THERE IS NOTHING IN $_POST, PUT UP THE FORM FOR INPUT
if (empty($_POST))
{
?>
<h2>Upload <?php echo $nf; ?> file(s)</h2>
<!--
SOME THINGS TO NOTE ABOUT THIS FORM...
ENCTYPE IN THE HTML <FORM> STATEMENT
MAX_FILE_SIZE MUST PRECEDE THE FILE INPUT FIELD
INPUT NAME= IN TYPE=FILE DETERMINES THE NAME YOU FIND IN $_FILES ARRAY
-->
<form name="UploadForm" enctype="multipart/form-data" action="<?=$_SERVER["REQUEST_URI"]?>" method="POST">
<input type="hidden" name="MAX_FILE_SIZE" value="<?=$max_file_size?>" />
<p>
Find the file(s) you want to upload and click the "Upload" button below.
</p>
<?php // CREATE INPUT STATEMENTS FOR UP TO $n FILE NAMES
for ($n = 0; $n < $nf; $n++)
{
echo "<input name=\"userfile$n\" type=\"file\" size=\"80\" /><br/>\n";
}
?>
<br/>Check this box <input autocomplete="off" type="checkbox" name="overwrite" /> to <b>overwrite</b> existing files.
<input type="submit" name="_submit" value="Upload" />
</form>
<?php
die();
}
// END OF THE FORM SCRIPT
// WE HAVE GOT SOMETHING IN $_POST - RUN THE ACTION SCRIPT
else
{
// THERE IS POST DATA - PROCESS IT
echo "<h2>Results: File Upload</h2>\n";
// ACTIVATE THIS TO SEE WHAT IS COMING THROUGH
// echo "<pre>"; var_dump($_FILES); var_dump($_POST); echo "</pre>\n";
// ITERATE OVER THE CONTENTS OF $_FILES
foreach ($_FILES as $my_uploaded_file)
{
// SKIP OVER EMPTY SPOTS - NOTHING UPLOADED
$error_code = $my_uploaded_file["error"];
if ($error_code == 4) continue;
// SYNTHESIZE THE NEW FILE NAME
$f_type = trim(strtolower(end (explode( '.', basename($my_uploaded_file['name'] )))));
$f_name = trim(strtolower(current(explode( '.', basename($my_uploaded_file['name'] )))));
$my_new_file = getcwd() . '/' . $uploads . '/' . $f_name . '.' . $f_type;
$my_file = $uploads . '/' . $f_name . '.' . $f_type;
// OPTIONAL TEST FOR ALLOWABLE EXTENSIONS
if (!in_array($f_type, $file_exts)) die("Sorry, $f_type files not allowed");
// IF THERE ARE ERRORS
if ($error_code != 0)
{
$error_message = $errors[$error_code];
die("Sorry, Upload Error Code: $error_code: $error_message");
}
// GET THE FILE SIZE
$file_size = number_format($my_uploaded_file["size"]);
// IF THE FILE IS NEW (DOES NOT EXIST)
if (!file_exists($my_new_file))
{
// IF THE MOVE FUNCTION WORKED CORRECTLY
if (move_uploaded_file($my_uploaded_file['tmp_name'], $my_new_file))
{
$upload_success = 1;
}
// IF THE MOVE FUNCTION FAILED
else
{
$upload_success = -1;
}
}
// IF THE FILE ALREADY EXISTS
else
{
echo "<br/><b><i>$my_file</i></b> already exists.\n";
// SHOULD WE OVERWRITE THE FILE? IF NOT
if (empty($_POST["overwrite"]))
{
$upload_success = 0;
}
// IF WE SHOULD OVERWRITE THE FILE, TRY TO MAKE A BACKUP
else
{
$now = date('Y-m-d');
$my_bak = $my_new_file . '.' . $now . '.bak';
if (!copy($my_new_file, $my_bak))
{
echo "<br/><strong>Attempted Backup Failed!</strong>\n";
}
if (move_uploaded_file($my_uploaded_file['tmp_name'], $my_new_file))
{
$upload_success = 2;
}
else
{
$upload_success = -1;
}
}
}
// REPORT OUR SUCCESS OR FAILURE
if ($upload_success == 2) { echo "<br/>It has been overwritten.\n"; }
if ($upload_success == 1) { echo "<br/><strong>$my_file</strong> has been saved.\n"; }
if ($upload_success == 0) { echo "<br/><strong>It was NOT overwritten.</strong>\n"; }
if ($upload_success < 0) { echo "<br/><strong>ERROR: $my_file NOT SAVED - SEE WARNING FROM move_uploaded_file() COMMAND</strong>\n"; }
if ($upload_success > 0)
{
echo "$file_size bytes uploaded.\n";
if (!chmod ($my_new_file, 0755))
{
echo "<br/>chmod(0755) FAILED: fileperms() = ";
echo substr(sprintf('%o', fileperms($my_new_file)), -4);
}
echo "<br/><a href=\"$my_file\">See the file $my_file</a>\n";
}
// END FOREACH ITERATOR - EACH ITERATION PROCESSES ONE FILE
}
}
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