Heat Map Graph

Heat Map Graph lets administrators build data heat maps backed by SQL SELECT queries on WordPress tables. Configure:

• Query: a single SELECT statement targeting WP tables
• Field mapping: row, column, and value fields produced by the query
• Color range: hex colors for min and max
• Status: enable/disable

Use the shortcode on pages/posts:

[heat_map_graph id="123"]

Security features:
– Validates SQL is a single SELECT against WP tables only
– Blocks DML/DDL keywords
– No multiple statements
– Admin-only UI with nonces and strict sanitization

On activation, two sample heat maps are created:
– Posts per Day per Category (Last 30 Days)
– Number of Post Tags per Category