# Copyright (C) 2007 Jason Woofenden
#
-# This file is part of wfpl.
-#
-# wfpl is free software; you can redistribute it and/or modify it under the
-# terms of the GNU Lesser General Public License as published by the Free
-# Software Foundation; either version 2.1 of the License, or (at your option)
-# any later version.
-#
-# wfpl is distributed in the hope that it will be useful, but WITHOUT ANY
-# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
-# more details.
-#
-# You should have received a copy of the GNU Lesser General Public License
-# along with wfpl; if not, write to the Free Software Foundation, Inc., 51
-# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This file contains functions to accept files being uplodad with the <input
# the type you specified, it will convert the image for you.
-
$GLOBALS['mime_to_ext'] = array(
'text/plain' => 'txt',
'text/html' => 'html',
}
if(!move_uploaded_file($_FILES[$key]['tmp_name'], $filename)) {
- die('file upload failed');
+ return false;
}
return $filename;
}
+# this function exists to deal with cases where binaries are installed in very
+# standard places (like /usr/bin or /usr/local bin) and PHP's PATH environment
+# variable is not set appropriately.
+function path_to($prog, $or_die = true) {
+ $prog = ereg_replace('[^a-zA-Z0-9_.-]', '', $prog);
+ $prog = ereg_replace('^[-.]*', '', $prog);
+ if($prog == '') {
+ die('Invalid argument to path_to()');
+ }
+
+ if(!isset($GLOBALS["path_to_$prog"])) {
+ $ret = _path_to($prog, $or_die);
+ if($ret == false) {
+ return false;
+ }
+ $GLOBALS["path_to_$prog"] = $ret;
+ }
+
+ return $GLOBALS["path_to_$prog"];
+}
+
+function _path_to($prog, $or_die) {
+ # relies on PHP's short-circuit mechanism
+ if(file_exists($path = "/usr/local/bin/$prog") ||
+ file_exists($path = "/usr/bin/$prog") ||
+ ($path = `which $prog` != '' && file_exists($path))) {
+ return $path;
+ } else {
+ if($or_die) {
+ die("Failed to locate '$prog' executable.");
+ }
+ return false;
+ }
+}
+
# returns new filename with .png extension
function gif_to_png($filename, $new_filename = 'just change extension') {
$new_filename .= '.png';
}
- $convert = '/usr/local/bin/convert';
- if(!file_exists($convert)) {
- $convert = '/usr/bin/convert';
- }
- if(!file_exists($convert)) {
- $convert = `which convert`;
- }
- if($convert == '' || !file_exists($convert)) {
- die("can't find imagemagick's 'convert' program");
- }
-
+ $convert = path_to('convert');
+
$command = "$convert " . escapeshellarg($filename) . ' ' . escapeshellarg($new_filename);
exec($command, $dummy, $ret);
return $new_filename;
}
+# make a thumbnail image.
+#
+# Thumbnail will have the same filename, except "_thumb" will be added right
+# before the dot preceding the extension. so foo.png yields foo_thumb.png
+#
+# Thumbnail will retain aspect ratio, and be either $max_width wide or
+# $max_height tall (or, if the aspect is just right, both)
+function make_thumbnail($filename, $max_width = '70', $max_height = '70') {
+ $last_dot = strrpos($filename, '.');
+ if($last_dot === false) {
+ die("couldn't make thumbnail because filename has no extension.");
+ }
+
+ $thumb = substr($filename, 0, $last_dot);
+ $thumb .= '_thumb';
+ $thumb .= substr($filename, $last_dot);
+
+ $convert = path_to('convert');
+
+ # can't be too careful
+ $max_width = ereg_replace('[^0-9]', '', $max_width);
+ if($max_width == '') {
+ $max_width = '70';
+ }
+ $max_height = ereg_replace('[^0-9]', '', $max_height);
+ if($max_height == '') {
+ $max_height = '70';
+ }
+
+ $command = "$convert -geometry ${max_width}x$max_height " . escapeshellarg($filename) . ' ' . escapeshellarg($thumb);
+
+ exec($command, $dummy, $ret);
+ if($ret != 0) {
+ die("Thumbnail creation failed. Convert called exit($ret)");
+ }
+
+ return $thumb;
+}
+
+# Argument: path to image file
+#
+# Return: string in the format WIDTHxHEIGHT, or boolean false
+#
+# Example: image_dimensions('uploads/foo.png'); ==> "124x58"
+function image_dimensions($image) {
+ $identify = path_to('identify');
+ $command = "$identify -format '%wx%h' " . escapeshellarg($image);
+ $dimensions = rtrim(`$command`);
+ if($dimensions == '') {
+ return false;
+ } else {
+ return $dimensions;
+ }
+}
+
# like save_uploaded_file() (above) except it converts gifs to pngs.
#
# FIXME: if a filename is passed in the end of path, we should check if the file type matches, and if not run convert.
Got questions, comments, patches, etc.? Contact Jason Woofenden