The #// require_once "$IP/extensions/PDFEmbed/PDFEmbed.php"; should be replaced by the read me script in the file and the download link doesn't give the same files as git hub master on gihub. The read me file indicates: wfLoadExtension("PDFEmbed"); look below and it worked didn't with first command.
PDFEmbed ========
[PDFEmbed](https://www.mediawiki.org/wiki/Extension:PDFEmbed) allows Adobe Acrobat PDF files to be embedded into a wiki article using <pdf></pdf> tags. The PDF file extension is automatically added and necessarily default permissions are configured. Future functionality will allow this extension to act as a media handler for PDF files.
Installation
To install this extension, add the following to the end of the LocalSettings.php file: ```php //PDFEmbed wfLoadExtension("PDFEmbed"); ```
Configuration
If the default configuration needs to be altered add these settings to the LocalSettings.php file below the require: ```php //Default width for the PDF object container. $wgPdfEmbed['width'] = 800;
//Default height for the PDF object container. $wgPdfEmbed['height'] = 1090; ```