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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 1274 | $this->tax_query = new WP_Tax_Query( $tax_query ); |
| 1275 | |
| 1276 | /** |
| 1277 | * Fires after taxonomy-related query vars have been parsed. |
| 1278 | * |
| 1279 | * @since 3.7.0 |
| 1280 | * |
| 1281 | * @param WP_Query $this The WP_Query instance. |
| 1282 | */ |
| 1283 | do_action( 'parse_tax_query', $this ); |
| 1284 | } |
| 1285 | |
| 1286 | /** |
| 1287 | * Generate SQL for the WHERE clause based on passed search terms. |
| 1288 | * |
| 1289 | * @since 3.7.0 |
| 1290 | * |
| 1291 | * @param array $q Query variables. |
| 1292 | * @return string WHERE clause. |