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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 |
|---|---|
| 134 | /** |
| 135 | * Filters the minimum number of characters required to fire a tag search via Ajax. |
| 136 | * |
| 137 | * @since 4.0.0 |
| 138 | * |
| 139 | * @param int $characters The minimum number of characters required. Default 2. |
| 140 | * @param object $tax The taxonomy object. |
| 141 | * @param string $s The search term. |
| 142 | */ |
| 143 | $term_search_min_chars = (int) apply_filters( 'term_search_min_chars', 2, $tax, $s ); |
| 144 | |
| 145 | /* |
| 146 | * Require $term_search_min_chars chars for matching (default: 2) |
| 147 | * ensure it's a non-negative, non-zero integer. |
| 148 | */ |
| 149 | if ( ( $term_search_min_chars == 0 ) || ( strlen( $s ) < $term_search_min_chars ) ){ |
| 150 | wp_die(); |
| 151 | } |
| 152 | |