WordPress PHP Upgrade: Why “It’s Working Fine” Is Costing You Sales

WordPress admin shown on a laptop after a PHP upgrade.

When “Emergency Upgrades” Aren’t Really Emergencies

Here’s a scenario I see play out at least once a quarter:

A marketing manager at an outdoor gear company gets an email from their hosting provider or agency. The subject line reads something like “URGENT: PHP Upgrade Required” or “Action Required: Server Maintenance.”

The message inside explains that their WordPress site is running on an outdated PHP version and needs to be upgraded—immediately. Often, there’s a price tag attached and a tight deadline.

The reaction is usually the same: “But the site is working fine right now. Why do we need to do this?”

That’s a fair question. Your product pages load. Checkout works. Your marketing team can still publish content. Everything seems fine on the surface.

But here’s what’s actually happening underneath: your WordPress site is running on infrastructure that’s working against you in three specific ways. And each one directly impacts your ability to compete with other outdoor brands who are moving faster.

The Hidden Cost of Old PHP Versions

When your WordPress site runs on PHP 7.4 or older (PHP 8.0+ is current), you’re not just dealing with a technical issue—you’re dealing with friction that shows up across your entire digital operation.

Let’s talk about what this looks like through the lens of the three experiences that matter most: your customers, your marketing team, and your technical foundation.

Audience Experience: Speed Kills (Conversions)

Your customers don’t care what version of PHP your site runs on. But they absolutely notice when pages load slowly.

Older PHP versions process requests more slowly than modern versions. The difference might seem small—maybe 200-300 milliseconds per page load—but it compounds across every interaction.

Here’s why that matters for outdoor gear brands specifically: your customers are researching obsessively. They’re comparing specs across multiple brands, reading reviews, checking compatibility charts, and cross-referencing product details. A customer might load 15-20 pages during a single research session.

If each page takes an extra 300ms to load, that’s 4.5-6 seconds of cumulative delay across their journey. Studies show that even a 100ms delay in load time can reduce conversion rates by 7%. For a brand doing $5M annually in online sales, that’s potentially $350K left on the table.

And that’s before we talk about Google’s Core Web Vitals, which directly factor page speed into search rankings. Slower sites rank lower, which means fewer people even find your products in the first place.

Creator Experience: Your Marketing Team Shouldn’t Need IT for Everything

Here’s where outdated PHP versions really hurt day-to-day operations.

Your content team wants to install a new plugin for product comparisons. But that plugin requires PHP 8.0 or higher. Now what was supposed to be a 20-minute task becomes a week-long project involving your hosting provider, your dev team, and a bunch of testing.

Or maybe your marketing manager finds a theme that would be perfect for a new product line landing page. Turns out it won’t work on your current PHP version. So you either abandon the idea or go back to custom development, which takes weeks and costs thousands.

This is the hidden tax of running outdated infrastructure: your marketing team becomes dependent on technical resources for things they should be able to handle independently.

Every plugin limitation, every theme incompatibility, every workaround adds friction. And friction kills momentum. When it takes three weeks to launch a simple campaign that your competitors can ship in three days, you’re not competing on equal footing.

Developer Experience: Technical Debt Compounds

For your development team (whether in-house or agency), old PHP versions create a different kind of problem: everything takes longer and breaks more often.

WordPress itself evolves quickly. Plugins update constantly. Security patches come out regularly. When you’re stuck on an old PHP version, your developers are constantly having to check compatibility, test workarounds, and maintain custom code that wouldn’t be necessary on a modern stack.

That means:

  • Longer project timelines for even simple updates
  • Higher costs because everything requires more developer time
  • More frequent bugs because you’re running old, unsupported code
  • Greater security risk because older PHP versions stop receiving security updates

PHP 7.4 reached end-of-life in November 2022. That means no more security patches. Your site is running on infrastructure that known vulnerabilities will never be fixed on.

Why WordPress PHP Upgrades Feel Scary (And Why They Don’t Have to Be)

Here’s the thing: most brands avoid upgrading PHP not because they don’t understand the benefits, but because they’ve heard horror stories about upgrades breaking sites.

And yes, that can happen—especially if your site has accumulated years of custom code, outdated plugins, or poorly-maintained themes.

But here’s what almost never gets said: The longer you wait, the harder the upgrade becomes.

Every month you delay is another month of plugins updating, WordPress core evolving, and your codebase drifting further from modern standards. The gap between where you are and where you need to be only gets wider.

The good news? With the right approach, a WordPress PHP upgrade doesn’t have to be dramatic or disruptive.

How to Approach a WordPress PHP Upgrade the Right Way

If your site is still running PHP 7.4 or earlier, here’s the practical path forward:

1. Audit first, upgrade second. Run your site through compatibility checking tools to identify which plugins, themes, or custom code might have issues. This takes 30 minutes and tells you exactly what needs attention.

2. Use staging environments. Never upgrade PHP directly on your live site. Test everything on a staging copy first, fix any issues that come up, then migrate the changes to production. Most modern hosts (like Kinsta, WP Engine, or Flywheel) include staging environments by default.

3. Fix issues in small batches. Most PHP compatibility issues are syntax-related and can be fixed quickly—sometimes in minutes. The key is addressing them methodically rather than all at once in a panic.

4. Modernize while you’re at it. A PHP upgrade is a natural time to also update plugins, remove unused code, and clean up technical debt. If you’re going to touch the infrastructure anyway, make it count.

5. Document everything. Keep a clear record of what changed, why it changed, and how to roll back if needed. This turns a scary upgrade into a controlled, reversible process.

The 3E Framework Applied to PHP Upgrades

At Ndevr, we think about WordPress maintenance through three interconnected lenses: Audience Experience, Creator Experience, and Developer Experience.

A WordPress PHP upgrade touches all three:

Audience Experience improves because pages load faster, checkout flows are more reliable, and your site can leverage modern performance optimizations that older PHP versions can’t support.

Creator Experience improves because your marketing team gains access to better tools, more flexible workflows, and fewer technical limitations. They can move faster without waiting on developers for everything.

Developer Experience improves because maintaining a site on modern infrastructure is dramatically easier than patching together workarounds on outdated systems. Fewer bugs, cleaner code, faster deployments.

When you upgrade PHP as part of a broader platform strategy—not just as a one-off technical task—you’re not just solving a compliance issue. You’re removing friction from your entire digital operation.

What Happens If You Don’t Upgrade

Let’s be honest about the alternative.

If you don’t upgrade PHP, here’s what happens over the next 6-12 months:

  • Your hosting provider will eventually force the issue (often with short notice)
  • Plugin developers will stop supporting older PHP versions, leaving you with security vulnerabilities
  • Your site will fall further behind competitors who are leveraging faster, more capable infrastructure
  • Your development costs will keep rising because everything takes longer on outdated systems
  • You’ll hit more limitations when trying to implement new features or campaigns

Eventually, you’ll have to upgrade anyway—but it’ll be messier, more expensive, and probably under time pressure.

The question isn’t whether to upgrade. It’s whether to do it proactively on your timeline, or reactively when you have no choice.

Moving Forward: Platform Strategy Over Panic Upgrades

Here’s what I tell every outdoor brand dealing with this decision:

A WordPress PHP upgrade shouldn’t be an emergency. It should be part of a planned, strategic approach to managing your digital platform.

That means:

  • Regular maintenance windows for updates and improvements
  • Staging environments where you can test changes safely
  • Clear documentation of your tech stack and dependencies
  • A team (internal or agency) that understands your business goals, not just your code

When you approach your website as a platform that needs ongoing care rather than a static asset that occasionally breaks, these kinds of upgrades become routine instead of dramatic.

And that’s the difference between brands that scale smoothly and brands that lurch from crisis to crisis every time technology evolves.

Want a Clearer Picture of Your Platform Health?

If you’re not sure where your WordPress site stands—whether it’s just a PHP upgrade you need or a more comprehensive platform refresh—we’ve put together a practical guide that helps you diagnose the friction points and prioritize what matters most.

Download the Platform Strategy Playbook and get:

  • A “Velocity Killer” assessment to identify what’s actually slowing down your team
  • Decision frameworks for evaluating your tech stack
  • A 30-day implementation timeline for quick wins
  • Real-world examples from outdoor and manufacturing brands

Your website should be supporting your growth, not creating obstacles. Let’s make sure it’s built on infrastructure that can keep pace with where you’re headed.