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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 |
---|---|
3192 | if ( !$q['suppress_filters'] ) { |
3193 | /** |
3194 | * Filters the WHERE clause of the query. |
3195 | * |
3196 | * @since 1.5.0 |
3197 | * |
3198 | * @param string $where The WHERE clause of the query. |
3199 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
3200 | */ |
3201 | $where = apply_filters_ref_array( 'posts_where', array( $where, &$this ) ); |
3202 |
|
3203 | /** |
3204 | * Filters the JOIN clause of the query. |
3205 | * |
3206 | * @since 1.5.0 |
3207 | * |
3208 | * @param string $where The JOIN clause of the query. |
3209 | * @param WP_Query &$this The WP_Query instance (passed by reference). |
3210 | */ |