Safe Function Call

Safely call a function, class method, or object method in a manner that doesn’t generate errors if those plugins cease to exist.

Various helper functions are provided that provide handy variations of this theme:

• _sfc(): Safely call a function and get its return value
• _sfce(): Safely call a function and echo its return value
• _sfcf(): Safely call a function; if it doesn’t exist, then a fallback function (if specified) is called
• _sfcm(): Safely call a function; if it doesn’t exist, then echo a message (if provided)

Let’s assume you had something like this in a template:

<?php list_cities( 'Texas', 3 ); ?>

If you deactivated the plugin that provided list_cities(), your site would generate an error when that template is accessed.

You can instead use _sfc(), whi…