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PHP Compatibility Checker

v1.6.3

by WP Engine · updated 3 months ago

Make sure your plugins and themes are compatible with newer PHP versions.

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WordPress.org SaveAnalyze reviews Track this plugin
Rank
#266
No change0 vs yesterday
Active installs (est.)
≈ 220,000
200K+ reported · Low
Total downloads
3.1M
3,078,125 all-time
Rating
2.7/5
131 reviews
Support resolved
–
0 of 0 threads, last 2 months
Growing·Downloads +55.2% (30d)·Toward 300K+ · ETA ~20d

PHP Compatibility Checker at a glance

PHP Compatibility Checker is a WordPress plugin by WP Engine with 200K+ active installs, the #266 most popular plugin on WordPress.org. On a typical day it’s downloaded about 454 times, 55% more than the month before. It’s rated 2.7 out of 5 from 131 reviews. Version 1.6.3 came out on Jul 20, 2026 and is tested up to WordPress 6.4.14. It leads the 2 plugins tagged “compat”. It was first released in 2016.

Chart time range

Applies to every chart below. History from Oct 9, 2026, 31 days.

Showing the last 30 days. Full history comes with any paid plan.See plans

Downloads over time

Download stats

21.5K downloads · the last 30 days

Downloads over time
PHP Compatibility Checker Compare series
Downloads over time: 30 days across 1 series.02K4KOct 9Oct 14Oct 19Oct 24Oct 28Nov 2Nov 7Oct 29, 2026: Tested up to 6.4.14
View as table
DatePHP Compatibility Checker
Nov 7, 2026298
Nov 6, 2026413
Nov 5, 2026438
Nov 4, 2026438
Nov 3, 2026414
Nov 2, 2026490
Nov 1, 2026365
Oct 31, 2026295
Oct 30, 2026469
Oct 29, 2026538
Oct 28, 2026678
Oct 27, 2026867
Oct 26, 2026953
Oct 25, 2026625
Oct 24, 2026788
Oct 23, 20262,052
Oct 22, 20264,836
Oct 21, 20262,845
Oct 20, 2026375
Oct 19, 2026339
Oct 18, 2026206
Oct 17, 2026218
Oct 16, 2026282
Oct 15, 2026272
Oct 14, 2026340
Oct 13, 2026367
Oct 12, 2026375
Oct 11, 2026223
Oct 10, 2026257
Oct 9, 2026419

Unusual spikes are usually updates, not new installs.

Estimated installs

≈ 222,743 · +0.8% in the last 30 days

Estimated installs
Estimated installs: 12 days across 1 series.221K222KOct 27Oct 29Oct 31Nov 2Nov 4Nov 8Oct 29, 2026: Tested up to 6.4.14
View as table
DateEstimated installs
Nov 8, 2026222,743
Nov 7, 2026222,687
Nov 5, 2026222,024
Nov 4, 2026222,010
Nov 3, 2026221,079
Nov 2, 2026220,970
Nov 1, 2026221,695
Oct 31, 2026221,594
Oct 30, 2026221,814
Oct 29, 2026221,159
Oct 28, 2026221,300
Oct 27, 2026220,943

Rank over time

#266 · up 7 in the last 30 days

Popular rank
Popular rank: 14 days across 1 series.#270Oct 16Oct 27Oct 31Nov 4Nov 8Oct 29, 2026: Tested up to 6.4.14
View as table
DateDaily snapshot
Nov 8, 2026#266
Nov 7, 2026#266
Nov 6, 2026#267
Nov 5, 2026#267
Nov 4, 2026#267
Nov 3, 2026#268
Nov 2, 2026#268
Nov 1, 2026#268
Oct 31, 2026#268
Oct 30, 2026#268
Oct 29, 2026#269
Oct 28, 2026#269
Oct 27, 2026#269
Oct 16, 2026#273

Growth %

Average +0.07% a day in the last 30 days

Growth %, day over day
Growth %, day over day: 11 days across 1 series.0%Oct 28Oct 30Nov 1Nov 4Nov 8
View as table
DateGrowth
Nov 8, 2026+0.03%
Nov 7, 2026+0.15%
Nov 5, 2026+0.01%
Nov 4, 2026+0.42%
Nov 3, 2026+0.05%
Nov 2, 2026-0.33%
Nov 1, 2026+0.05%
Oct 31, 2026-0.10%
Oct 30, 2026+0.30%
Oct 29, 2026-0.06%
Oct 28, 2026+0.16%

Active installs band

200K+ on WordPress.org

Active installs (rounded band)
Active installs (rounded band): 14 days across 1 series.190K200K210KOct 16Oct 27Oct 31Nov 4Nov 8Oct 29, 2026: Tested up to 6.4.14
View as table
DateDaily snapshot
Nov 8, 2026200K+
Nov 7, 2026200K+
Nov 6, 2026200K+
Nov 5, 2026200K+
Nov 4, 2026200K+
Nov 3, 2026200K+
Nov 2, 2026200K+
Nov 1, 2026200K+
Oct 31, 2026200K+
Oct 30, 2026200K+
Oct 29, 2026200K+
Oct 28, 2026200K+
Oct 27, 2026200K+
Oct 16, 2026200K+

Search rankings

Where it appears in WordPress.org search for the searches you track, checked every day.

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Change log

From our daily snapshot of WordPress.org
  1. Rank #269 → #267Downloads -36.5%
    • Tested up to 6.4.13 → 6.4.14

Versions in use

Share of active installs on each published version, from WordPress.org.

  • v1.686%
  • v1.513%
  • Other1.2%

Rating trend

2.7★★★★★131 reviews · steady in the last 30 days

Requirements & info

Version history
Version
1.6.3
Requires WordPress
5.6
Tested up to
6.4.14
Requires PHP
5.6
First released
Jun 29, 2016
Last updated
Jul 20, 2026
Releases, last 12 months
…

Questions about PHP Compatibility Checker

How many websites use PHP Compatibility Checker?

PHP Compatibility Checker is active on 200K+ WordPress sites, as WordPress.org reports it. WordPress.org rounds the number down, so the real count is somewhat higher. That makes it the #266 most popular plugin on WordPress.org.

How many times has PHP Compatibility Checker been downloaded?

3,078,125 times in total since 2016. On a typical day it’s downloaded about 454 times. See download stats

When was PHP Compatibility Checker last updated?

Version 1.6.3 came out on Jul 20, 2026 (3 months ago). See every release

Is PHP Compatibility Checker compatible with the latest WordPress?

PHP Compatibility Checker’s readme says it’s tested up to WordPress 6.4.14, while the current version is 7.1. That doesn’t mean it breaks, but its author hasn’t confirmed it works with the latest releases.

Does PHP Compatibility Checker have known security vulnerabilities?

None that affect the current version. WPVulnerability’s database lists 1 older issue, fixed in earlier versions, so keep PHP Compatibility Checker up to date. See its security record

Is PHP Compatibility Checker still maintained?

Yes. Its last release was 3 months ago. No support threads were opened in the last two months.

What rating does PHP Compatibility Checker have?

2.7 out of 5 from 131 reviews on WordPress.org. 35% of them give 5 stars.

What are the best alternatives to PHP Compatibility Checker?

The plugins most like PHP Compatibility Checker, by the tags they share, are WP Downgrade (100K+), PHP Code Widget (70K+) and FluentSnippets (50K+). Compare all alternatives

Latest reviews

Analyze reviews
All reviews on WordPress.org

Review stats

2.7

★★★★★

131 reviews

  • 5 stars: 46 reviews, 35%
  • 4 stars: 6 reviews, 5%
  • 3 stars: 2 reviews, 2%
  • 2 stars: 11 reviews, 8%
  • 1 stars: 66 reviews, 50%
Positive
40%4–5★
Mixed
2%3★
Critical
59%1–2★
  • About 6 more 5★ reviews would lift it to 2.8.
  • Each new 1★ review takes 1 five-star review to balance out.

Compare with competitors

Add up to 1 competitor. No account needed.

Starter · 1 competitor
PHP Compatibility Checker
Suggested:
Metric
PHP Compatibility Checker
Estimated installs≈ 220,000
Reported installs200K+
Rating2.7
Reviews131
Total downloads3.1M
AuthorWP Engine
First releasedJun 29, 2016
Version1.6.3
Requires WP5.6
Requires PHP5.6
Last updatedJul 20, 2026

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Side by side:PHP Compatibility Checker vs WP DowngradePHP Compatibility Checker vs PHP Code WidgetPHP Compatibility Checker vs FluentSnippets

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