Category: PHP | WP-Mix

Category Archive: PHP

Posts about PHP

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PHP: Get $_SERVER Variables

I use a variation of this function to get super global $_SERVER variables in my free shapeSpace WordPress theme. The function returns all relevant variables contained in the $_SERVER array. Note this is a general PHP technique, so WordPress is not required for this one.

WordPress: Simple Image Upload with jQuery

Some of my free WordPress plugins enable users to select and upload files from their local machine. The uploaded images are handled by WordPress and added to the Media Library. The technique is very basic and easy to implement, requiring only a few snippets added to your WordPress site.

Find All URLs in a String with PHP

While developing my WordPress chat plugin, SAC Pro, I needed a way to get all URLs from a string. This enabled me to find any URLs that were included in chat messages, so I could apply HTML formatting and convert the raw URLs into actual clickable hyperlinks.

PHP: Two Ways to Check if Remote File Exists

Working on my free WordPress plugin, Simple Download Counter, I needed a quick way to check if a remote file exists. As in, requesting the file returns a 200 “OK” response. Here are a couple of ways to do it via PHP.

Display All PHP Errors on Screen

When working on a PHP project, I usually log any errors to a file (error log), but on some projects it’s necessary to display any errors right there on the page. Here is the code that I use to make it happen.

Change Database Type to InnoDB or MyISAM

Originally, the WordPress database was formatted as type MyISAM. Then years later they changed the database format to InnoDB. Reportedly, InnoDB is superior to MyISAM in several ways. This is true for any dynamic site, not just WordPress. If your database is not InnoDB, you may benefit from changing it. This quick tutorial explains how […]

PHP: Remove Empty File Data

This quick function does one simple thing. It removes empty file data from a PHP files array. As you may know, the structure of the $_FILES array is sort of backwards from what normally would be expected. Because of this, removing empty file data from the array requires some extra wrangling. So to make things […]

PHP Geo IP Lookup

Here is a nice PHP snippet for GeoIP lookups. As written the script uses api.hostip.info for the lookup service, but that is easily changed as needed (GeoIP lookup services change or go offline constantly). So for what it’s worth, figured it was worth sharing rather than complete and utter deletion. Yes I am a code […]

Rename uploaded files in WordPress

Here is a function used in my free WordPress plugin User Submitted Posts that enables you to rename WordPress media uploads. So for example, if the user uploads a JPG image named “sweet-ride.jpg”, the following function will append a random string to rename the file “sweet-ride-random.jpg”, where “random” is a random alphanumeric string containing 20 […]

WordPress Get Edited Post ID

Working on my plugin Disable Gutenberg, I needed a way to get the ID of an edited post. Not on the front-end, but on the “Edit Post” screen in the WP Admin Area. Unfortunately WordPress does not provide a built-in core function for handling this, so it’s necessary to roll our own solution.

503 Service Unavailable Headers via PHP

Sending a few HTTP headers is a simple way to let visitors and search engines know that your site currently is unavailable. This is useful when you are doing maintenance and don’t need access to the front-end of your site. Simply add the rules when your site is down, and then remove them once everything […]

PHP Add and Remove Query Strings

Found a couple of useful PHP code snippets for adding and removing query strings from URLs. This is useful when implementing paged and search functionality, among other things. These functions work great and are a real time saver — copy, paste, test, and done.

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