After the latest update to Windows 10, my Windows temporary directory was updated such that I re-encountered some of the problems I’d experienced earlier in the year. When I fixed the problem I didn’t write down the actions that I’d taken to restore access to my own files. This time I did. [Read more…]
Learning Pro React including node.js and other stuff
This post documents my experiences of getting started with React.js. Note: this is a work in progress. [Read more…]
Installing node.js on Windows – pre-requisite to Pro React
This is a work in progress post, cloned rather prematurely from my development machine so I can refer to from my iPad when my development machine is not available. [Read more…]
How to run PHPUnit tests for WordPress plugins in situ
For every new release of WordPress, plugin and theme developers are expected to test that their products are compatible with the new version, and to update their “Compatible up to” status. But if you have lots and lots of plugins, how do you test them all? WordPress uses a tool called PHPUnit. Plugins and themes can do the same. This post discusses the solution that I’ve been developing to PHPUnit test my WordPress plugins in situ. [Read more…]
Weight zone shipping for WooCommerce 2.6 now available
Two versions of my new Weight zone shipping for WooCommerce 2.6 plugin are now available. [Read more…]
What image do you see?
This is a simple blog post to test what image I actually see when I view the cached version of a file which once showed “Multiple Rate Weight and Country based shipping” and now shows “Add shipping method”.
The image URL is.
http://i2.wp.com/herbmiller.me/wp-content/uploads/2016/07/screenshot-1-1.jpg
This is the image.
Try it on each of your devices and browsers. On my laptop with Chrome it still shows the “Multiple Rate Weight and Country based shipping” () image. See Jetpack photo cache issue #2752333.
Summary of tests.
| Device browser etc | Displays expected image? |
|---|---|
| Laptop Chrome | |
| Laptop Chrome incognito | |
| Laptop Chrome after clearing cache | |
| Laptop Firefox | |
| Laptop IE | |
| iPad Safari | |
| iPad Chrome | |
| iPhone Safari | |
| iPhone Chrome | |
| Wife’s Samsung Galaxy Chrome | |
| Wife’s laptop Chrome | |
| Wife’s laptop Edge |
Jetpack photo cache issue #2752333
Attempting to demonstrate the need for being able to clear Jetpack’s photon cache. [Read more…]
bucket list – WordCamp Brighton: 23-24 July 2016 (#wcbtn)
This is my bucket list for WordCamp Brighton 2016; things to achieve before I depart at the end of the Contributor day. [Read more…]
More sites recovered – TSOhost yet to apologise
It appears that my problem with this site was not a one-off. Quite a few of the sites that I have hosted with TSOhost were affected by the server switch. For some reason during the migration the level of PHP that was chosen was 5.4.45, with memory_limit set to 25M. [Read more…]
Site recovered – sorry for the inconvenience
Sometime on the 12th my site started to produce a series of PHP Fatal errors saying “Allowed memory size of 41943040 bytes exhausted.”. This was a bit of a surprise. It means that my memory limit was 40M, a lot lower than the expected value of 256M.
Other times the response was
[13-Jul-2016 02:54:59 UTC] PHP Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0
Problem recovery
To recover from this problem I used ftp to rename Jetpack to Jetpack-f. I was then able to access the site.
Problem explanation
- The site was migrated from one host to another.
- The PHP version on the new host was 5.4.45.
- The memory_limit was set to
25M. - For PHP 5.3, 5.5 and 5.6 the memory_limit would have been
256M; a much nicer number. - By the time WordPress started up the memory limit became
40M. - It’s WordPress that sets this limit, depending on the site. For WPMS it’s
64M. See wp_initial_constants().
I’ve yet to track down the specific plugin/module combination that causes WP to exceed the 4OM limit.
Other notes
- My oik-bwtrace plugin reports the memory limit on its admin page.
- This is 256M, since WordPress sets it higher in admin pages. Using admin_memory_limit in wp-admin/admin.php.
- I’ve changed my [wp] shortcode to display the memory limit on the front-end.
- For this site the memory_limit has already been set by the hosting company to a high value.
WordPress 4.9.8. PHP: 7.0.32. Memory limit: 512M - I’m also experimenting with code that displays the current memory_limit in trace records produced by oik-bwtrace. They already optionally display current and peak memory usage, so adding the current memory limit is no big deal.