While ARQ is turned Off it is not doing anything. That is what you want while manually modifying files otherwise ARQ will Quarantine the file because ARQ will assume you are a hacker attempting to hack the website.
AutoRestore/Quarantine Correct Usage
AutoRestore/Quarantine (ARQ Infinity) IDPS is a real time file monitor that monitors all of your website files for any changes. When manually uploading files with FTP or modifying files or folders on your website follow these simple procedural steps for AutoRestore/Quarantine (ARQ) to avoid having those files autorestored and / or quarantined. If files are sent to Quarantine then use the Restore File option in Quarantine to restore those files. ARQ is amazing, but it cannot tell who you are if you are manually modifying files or folders outside of your WordPress Dashboard – that is not possible.1. Turn ARQ Off.
2. Upload or modify files or folders on your website.
3. Click the appropriate Backup Files button: Root Files, wp-admin Files, wp-includes Files or wp-content Files Backup Files button.
4. Turn ARQ back On.
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ARQ has tools to exclude folder or files. See this AutoRestore/Quarantine video tutorial on how to exclude folders OR files: http://forum.ait-pro.com/video-tutorials/#autorestore-quarantine
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Yes some hosts do block the ini_set php function due to lack of knowledge and understanding of this php function, but I have only seen a handful of hosts worldwide making that mistake. Yes if your particular host is doing that then you can create a custom php.ini file and remove the ini_set function from the disable_functions directive in your custom php.ini file.
