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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 |
---|---|
1508 | /** |
1509 | * Filters the category nicename before it is sanitized. |
1510 | * |
1511 | * Use the {@see 'pre_$taxonomy_$field'} hook instead. |
1512 | * |
1513 | * @since 2.0.3 |
1514 | * |
1515 | * @param string $value The category nicename. |
1516 | */ |
1517 | $value = apply_filters( 'pre_category_nicename', $value ); |
1518 | } |
1519 |
|
1520 | } elseif ( 'rss' == $context ) { |
1521 |
|
1522 | /** |
1523 | * Filters the term field for use in RSS. |
1524 | * |
1525 | * The dynamic portion of the filter name, `$field`, refers to the term field. |
1526 | * |