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Database & Queries · medium

2. Custom Post Types & WP_Query

Custom content schemas and database abstraction.

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WordPress supports custom schemas via `register_post_type` and `register_taxonomy`. Queries are executed safely using `WP_Query` with automatic SQL sanitization.

php
$query = new WP_Query([
    'post_type' => 'portfolio',
    'posts_per_page' => 10,
    'meta_query' => [
        ['key' => 'featured', 'value' => '1']
    ]
]);

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Check your understanding

1. Why use WP_Query instead of writing raw SQL with $wpdb in WordPress?
WP_Query handles object caching, taxonomy filtering, post status checks, and SQL injection safety automaticallyWP_Query is faster than raw SQL in all casesWordPress forbids SQLWP_Query is frontend only
2. What function must be called after a custom WP_Query loop to restore global $post data?
wp_reset_postdata()wp_reset_query()clean_post_cache()rewind_posts()

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