Do meta boxes not working

I am using the following code in a custom plugin to add the add new command in a plugin using a meta box but im using xampp and it says that do meta boxes is undefined for some reason.

add_meta_box(‘persons_form_meta_box’, ‘Person data’, ‘custom_table_example_persons_form_meta_box_handler’, ‘person’, ‘normal’, ‘default’);

<div class=”wrap”>
<div class=”icon32 icon32-posts-post” id=”icon-edit”>
</div>

<form id=”form” method=”POST”>
<?php /* NOTICE: here we storing id to determine will be item added or updated */ ?>
<input type=”hidden” name=”id” value=”<?php echo $item[‘id’] ?>”/>

<div class=”metabox-holder” id=”poststuff”>
<div id=”post-body”>
<div id=”post-body-content”>
<?php /* And here we call our custom meta box */ ?>
<?php do_meta_boxes(‘person’, ‘normal’, $item); ?>
<input type=”submit” value=”<?php _e(‘Save’, ‘custom_table_example’)?>” id=”submit” class=”button-primary” name=”submit”>
</div>
</div>
</div>
</form>
</div>

This is the full paste bin of the plugin in and bare with me im learning development

https://pastebin.com/R2QGHuBv