List all non-repeated dependency versions in a composer.lock file by package

show_composer_lock_reqs.php

<?php

/*
usage:
$ php -f .\show_composer_lock_reqs.php
$ php -f .\show_composer_lock_reqs.php /my/base/dir/ (note the slash at the end)
*/

array_walk(
	array_reduce (
		json_decode(
			file_get_contents(
				(count($_SERVER['argv']) > 1 ? $_SERVER['argv'][1] : '')
				. 'composer.lock'
			), 
			true
		)['packages'], 
		function($acc, $item) {
			$acc = array_merge_recursive(
				(is_null($acc) ? [] : $acc),
				[$item['name'] => [ $item['version']. ' (project)'] ],
				(isset($item['require']) ? $item['require']: []),
				(isset($item['require-dev']) ? $item['require-dev']: [])
				
			);
			ksort($acc);
			return $acc;
		}
	),
	function($v, $k){
		if(is_array($v)){
			$v = array_unique($v);
			asort($v);
			$versions = implode('; ', $v);
		} else {
			$versions = $v;
		}
		
		echo $k, ': ', $versions, "\n"; 
	}
);