Search the content of every post type for a match to a string

global_search.php

/* Search the content of every post type for a match to a string. Can be useful when a site's been hacked... */

global $wpdb;
$search = 'YOUR_STRING';

$results = $wpdb->get_results(" SELECT ID, post_title, post_type FROM {$wpdb->posts} WHERE post_status = 'publish' and post_content LIKE '%$search%' ");

echo '<h2>Posts Containing <code>' . esc_html( $search ) . '</code></h2>';

if ( ! $results ) {
	echo '<p>Not found.</p>';
	return;
}

echo '<ul>';
foreach ( $results as $post ) {
	$edit_link = get_edit_post_link( $post->ID );
	echo '<li>';
	if ( $edit_link ) {
		echo '<a href="' . esc_url( $edit_link ) . '">';
	}
	echo esc_html( $post->post_title ) . ' (' . esc_html( $post->post_type ) . ')';
	if ( $edit_link ) {
		echo '</a>';
	}
	echo '</li>';
}
echo '</ul>';