Get Raw SQL of Insert Statement - laravel

Question

I am looking for a way to get the correct SQL queries for an INSERT statement. I'm having to export this data for use in another (non-laravel) system. The post at How to get the raw SQL for a Laravel delete/update/insert statement? got me part of the way there but my queries are still parameterized:
Post::all()->each(function($post)
{
$builder = DB::table('posts');
$insertStatement = $builder->getGrammar()->compileInsert($builder->select(['created_at', 'title']), [
'created_at' => $post->created_at,
'title' => $post->title
]);
Storage::disk('sql')->append('posts-latest.sql', $insertStatement);
dump($insertStatement);
}
this results in...
insert into `posts` (`created_at`, `title`) values (?, ?)
So I've managed to set the fields to be updated but how to swap out the parameters for real values?

Answer 1

You can do this:
Post::all()->each(function($post){
$builder = DB::table('posts');
$grammar = $builder->getGrammar();
$values = [
'created_at' => $post->created_at,
'title' => $post->title
];
$table = $grammar->wrapTable($builder->from);
if (!is_array(reset($values))) {
$values = [$values];
}
$columns = $grammar->columnize(array_keys(reset($values)));
$parameters = collect($values)->map(function ($record) use ($grammar) {
$record = array_map(function($rec){
$rec = str_replace("'", "''", $rec);
return "'$rec'";
},array_values($record));
return '('.implode(', ', $record).')';
})->implode(', ');
$insertStatement = "insert into $table ($columns) values $parameters";
// $insertStatement should contains everything you need for this post
});

Answer 2

I ended up discovering DB::pretend which will generate the query without running it. Then it's a case of substitution. It seems that there is no way to get the raw SQL without substitution due to the use of parameters.
Post::all()->each(function($post)
{
$builder = DB::table('posts');
$query = DB::pretend(function() use ($builder, $post)
{
return $builder->insert([
'created_at' => $post->created_at,
'title' => $post->title,
'content' => $post->content,
'featured_image_link' => $post->featured_image_link,
'slug' => $post->slug
]);
});
$bindings = [];
collect($query[0]['bindings'])->each(function($binding) use (&$bindings)
{
$binding = str_replace("'", "\\'", $binding);
$bindings[] = "'$binding'";
});
$insertStatement = Str::replaceArray('?', $bindings, $query[0]['query']);
Storage::disk('sql')->append('posts-latest.sql', $insertStatement.';');
});