Regenerate attachment meta data

WP regenerate attachment meta data

<?php

// get all attachments
$attachments = get_posts( array(
	'post_type'      => 'attachment',
	'posts_per_page' => -1,
) );

foreach($attachments as $attach)
{
	// get upload base dir
	$upload = wp_upload_dir();
	$upload = $upload['basedir'];

	// get file relative path
	$begin  = strrpos($attach->guid, 'uploads/') + strlen('uploads/');
	$path   = trailingslashit($upload) . substr($attach->guid, $begin);

	// generate and update meta data
	$data = wp_generate_attachment_metadata( $attach->ID, $path );
	wp_update_attachment_metadata( $attach->ID, $data );
}