Get plugin path and url

q2amarket-plugin-path-and-url.php

<?php
/**
 * To set pluign path I used below
 *
 * Since my core class is in sub-directory of plugin, I had to point upward to get root directory
 */
define( 'Q2AM_DIR', q2am_trailingslash_dir( realpath( __DIR__ . '/../..' ) ) );


/*
 * To set pluign url
 * 
 * I have done bit it different way. Maybe this is not the best way
 * but it worked for me. If you find better way let me know
 */
$q2am_dir     = str_replace( [ '/', '\\' ], '/', Q2AM_DIR ); // this will gives pluign root directory
$plugin_dir = str_replace( [ '/', '\\' ], '/', QA_PLUGIN_DIR ); // this will give qa-plugin directory path

$path      = explode( '/', q2am_untrailingslash( $q2am_dir ) ); //Q2A Market function
$qa_plugin = explode( '/', q2am_untrailingslash( $plugin_dir ) ); //Q2A Market function
$key       = array_search( end( $qa_plugin ), $path );

if ( ( $key == array_search( end( $qa_plugin ), $path ) ) !== FALSE ) {
    $plugin_path = array_slice( $path, $key );
}

$q2am_url = implode( '/', $plugin_path );

// Finally, define the plugin url
define( 'Q2AM_URL', q2am_trailingslash( q2am_trailingslash( qa_opt( 'site_url' ) ) . $q2am_url ) );