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See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
- Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
- PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.
/badges/lib/ -> bakerlib.php (source)
Baking badges library.
| Author: | Yuliya Bozhko <yuliya.bozhko@totaralms.com> |
| Copyright: | 2012 onwards Totara Learning Solutions Ltd {@link http://www.totaralms.com/} |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 177 lines (6 kb) |
| Included or required: | 1 time |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
PNG_MetaDataHandler:: (3 methods):
__construct()
check_chunks()
add_chunks()
Class: PNG_MetaDataHandler - X-Ref
Information on PNG file chunks can be found at http://www.w3.org/TR/PNG/#11ChunksSome other info on PNG that I used http://garethrees.org/2007/11/14/pngcrush/
Example of use:
$png = new PNG_MetaDataHandler('file.png');
if ($png->check_chunks("tEXt", "openbadge")) {
$newcontents = $png->add_chunks("tEXt", "openbadge", 'http://some.public.url/to.your.assertion.file');
}
file_put_contents('file.png', $newcontents);
| __construct($contents) X-Ref |
| Prepares file for handling metadata. Verifies that this file is a valid PNG file. Unpacks file chunks and reads them into an array. param: string $contents File content as a string |
| check_chunks($type, $check) X-Ref |
| Checks if a key already exists in the chunk of said type. We need to avoid writing same keyword into file chunks. param: string $type Chunk type, like iTXt, tEXt, etc. param: string $check Keyword that needs to be checked. return: boolean (true|false) True if file is safe to write this keyword, false otherwise. |
| add_chunks($type, $key, $value) X-Ref |
| Adds a chunk with keyword and data to the file content. Chunk is added to the end of the file, before IEND image trailer. param: string $type Chunk type, like iTXt, tEXt, etc. param: string $key Keyword that needs to be added. param: string $value Currently an assertion URL that is added to an image metadata. return: string $result File content with a new chunk as a string. Can be used in file_put_contents() to write to a file. |
