This is a simple way to get a subset of associative array elements using an array of keys; basically you extract out the elements you want from a bigger array by listing the keys you need. Continue reading “Find subset of associative array in PHP”
Category: Code
Convert Large Integer to Hexadecimal without PHP Math extension
PHP has a couple of functions to convert integers to hexadecimal, dechex() and base_convert(). However, both functions lose precision on large integers.
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WordPress Localization Plugin for Sublime Text
I wrote this plugin for Sublime Text to help on a project where I am localizing a lot of text.
I found I was copy and pasting the same i18n methods over and over so I decided that there must be a relatively easy way to automate this using a plugin.
Now I select some text, press my key shortcut and the text gets replaced with the appropriate i18n method.
Continue reading “WordPress Localization Plugin for Sublime Text”
Determine if a row has recently been updated using MySQL
This is a fairly common case I think. You have a table that has a datetime field that gets updated when a row is updated – you need to determine if a row has been updated recently.
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Loop through dates with strtotime() function
This simple method allows you to start at a date and iterate by either days or months until you reach the end date using my favourite PHP function, strtotime().
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Php Unserialize string after non UTF8 characters stripped out
This may be a pretty rare problem but I’ll post it regardless.
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WordPress Debug Log without Deprecated Notices
You turn on WordPress debugging only to find the log full of deprecated notices that make the log difficult to parse. Bummer.
You could spend time going through each deprecated notice and updating the offending piece of code. Or you could ask WordPress to ignore these deprecated notices (at least in the short term) by doing the following;
Continue reading “WordPress Debug Log without Deprecated Notices”
Get last line of file in PHP
Here is a simple way to get the last line of a file without reading the entire file into memory.
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Php Sleep function in javascript
Here is a tidy javascript function that I found on stack overflow to mimic PHP’s usleep function which has been useful when testing javascript.
Continue reading “Php Sleep function in javascript”
How to debug your WordPress plugin
If you are developing a plugin on WordPress, you will need to debug your code as you go.
To enable debugging, go to your wp-config.php file.
Find the line…
define('WP_DEBUG', false);
Replace the line above with the following…
// Turns WordPress debugging on
define('WP_DEBUG', true);
// Tells WordPress to log everything to the /wp-content/debug.log file
define('WP_DEBUG_LOG', true);
// Doesn't force the PHP 'display_errors' variable to be on
define('WP_DEBUG_DISPLAY', false);
// Hides errors from being displayed on-screen
@ini_set('display_errors', 0);
Now you all warnings and errors will show up in the /wp-content/debug.log file, including WordPress warnings of deprecated functions.
You can write directly to this log from your plugin using the error_log() function.
Typically…
//output some debug string error_log( 'this works yo' ); //output some array/object error_log( print_r( $some_obj_or_array, 1 ) );
Kudos to this post. It has some good plugin development tips, including how to enable debugging on WordPress.
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