Merges JSON files

json_merge.php

<?php

$source = json_decode(file_get_contents('french.json'), true);
$dest = json_decode(file_get_contents('auto_french.json'), true);

function mergeArray($source, $dest) {
  
	foreach ($dest as $k => $v) {
		
		if (!array_key_exists($k, $source)) {
			
			$source[$k] = $v;
			
		} elseif (!is_string($v)) {
				
			$source[$k] = mergeArray($source[$k], $v);
			
		}
		
	}
	
	return $source;
	
}

$new = mergeArray($source, $dest);

file_put_contents('new_french.json', json_encode($new, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));