Overview: How to Increase PHP's post_max_size Value Using CloudLinux's Selector in cPanel
This guide explains How to Increase PHP's post_max_size Value Using CloudLinux's Selector in cPanel step‑by‑step and why it matters for security, uptime, and performance. It’s written for small and medium businesses that rely on Blackhawk MSP for proactive, managed IT support in the Bay Area and beyond.
- ✅ Clear, actionable steps
- ✅ Best‑practice notes from our MSP engineers
- ✅ Links to related services and help
Tip: If you’re short on time, contact us — we’ll handle this for you and verify everything is working.
You can modify PHP post_max_size as per your needs using CloudLinux PHP Selector in cPanel.
1. Log in to your cPanel account.
2. In the Software section, click on Select PHP Version.
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3. Click on the Options menu.

Note: If the Options page shows an error related to the native PHP version, change it to a non-native version first.
4. Look for post_max_size and click on the drop-down option displayed in front of it. Then choose the appropriate limit as per your requirements.

A message will appear stating that the Maximum Post Size has been changed.
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Need help? Blackhawk MSP can do this for you, verify success, and document the change. Call 1‑925‑218‑4000 or open a ticket.