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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 |
|---|---|
| 1950 | } |
| 1951 | /** |
| 1952 | * Filters a term before it is sanitized and inserted into the database. |
| 1953 | * |
| 1954 | * @since 3.0.0 |
| 1955 | * |
| 1956 | * @param string $term The term to add or update. |
| 1957 | * @param string $taxonomy Taxonomy slug. |
| 1958 | */ |
| 1959 | $term = apply_filters( 'pre_insert_term', $term, $taxonomy ); |
| 1960 | if ( is_wp_error( $term ) ) { |
| 1961 | return $term; |
| 1962 | } |
| 1963 | if ( is_int( $term ) && 0 == $term ) { |
| 1964 | return new WP_Error( 'invalid_term_id', __( 'Invalid term ID.' ) ); |
| 1965 | } |
| 1966 | if ( '' == trim( $term ) ) { |
| 1967 | return new WP_Error( 'empty_term_name', __( 'A name is required for this term.' ) ); |
| 1968 | } |