Checking success for a function that can return wp_error
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Tabbed admin page
To separate your admin page into separate tabs you can use the following for your page Pre HTML Output HTML Output
Plugin update database
Using a database version to trigger update See https://codex.wordpress.org/Creating_Tables_with_Plugins
Sharing values between shortcodes
You can output a shortcode from a shortcode and within that create an attribute value dynamically of course, but sharing a value from one shortcode triggered function call to another later in a page is presumably not possible. Use PHP global variables Global Variables Shortcode 1 Shortcode 2 Use javascript .innerHTML Use javascript .innerHTML to […]
Query Monitor
Plugin name: “Query Monitor”
Blank shortcode output
You may want to add a shortcode to your page content on a line on its own. Even if you SHIFT+RETURN to cause a <br> after it instead of it placed in a new paragraph, if you return(”) from your shortcode you’ll still have a blank line output on the page. Return a zero height […]
WordPress user email addresses
Get site admin email address
If function exists
Call only if function exists
For each
Foreach result Getting Key and Value Working through a json array
Assign value in an if statement
If result is not false Note – make sure you surround the assignment and function call in brackets or it doesn’t work!