Use this php script to convert a Ghost export json file to Hugo content file. Files will be created in a "output" folder, to reuse images place the ghost content folder into the hugo's static folder

Ghost_to_HUGO_blog.php

<?php

$ghost_data = json_decode(file_get_contents("./GhostData.json"),true) ;


foreach ($ghost_data['data']['posts'] as $key => $value) {

	$created_at = date("c",$value["created_at"]/1000);
	$title = str_replace('\\','\\\\',$value["title"]) ;
	$title = str_replace('"','\"',$title) ;
	$slug = $value["slug"] ;
	$markdown = $value["markdown"] ;
	$draft = ($value["published_at"] == null) ? 'true' : 'false' ;
	$published_at = ($value["published_at"] == null) ? date("c",$value["created_at"]/1000) : date("c",$value["published_at"]/1000); ;

	$output_dir = "./output" ;
	if (!is_dir($output_dir)) {
    	mkdir($output_dir);         
	}
	
	$file = $output_dir."/".$slug.".md" ;

	file_put_contents($file, '+++');
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, 'date = "' .$published_at.'"', FILE_APPEND);
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, 'draft = ' .$draft, FILE_APPEND);
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, 'title = "' .$title.'"', FILE_APPEND);
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, 'slug = "' .$slug.'"', FILE_APPEND);
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, '+++', FILE_APPEND);
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, "\n", FILE_APPEND);
	file_put_contents($file, $markdown, FILE_APPEND);
}