Determin if plugin is loaded

I think I have answered my question. After reviewing carefully and testing the global option EOS_xx_ACTIVE I realize that I had two incorrect assumptions.

1. If constant EOS_xx_ACTIVE is true, it means it is disabled. I thought that Active means NOT disabled.

2. I misunderstood how you use the word ‘global’ in the documentation. I thought Global referred to the entire site, not just the current page. I think you mean something else by global.

Also, a side note: In working through my own troubleshooting I printed out all of the ‘EOS_xx_ACTIVE’ constants. I noticed that some had the boolean value true and some had the value of string ‘true’. So I think it is ok when comparing with == true but not with === true.

Here is the code I came up with to check if a plugin is disabled on the current page. Please let me know if this is correct usage.

function freesoul_is_plugin_disabled( $plugin_filename ) {
    if ( ! is_plugin_active( 'freesoul-deactivate-plugins/freesoul-deactivate-plugins.php' ) ) {
        return false;
    }
    
    $constant = 'EOS_' . strtoupper( $plugin_filename ) . '_ACTIVE';
    
    return defined( $constant ) && constant( $constant ) == true;
}