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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 |
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1599 | $meta = array(); |
1600 |
|
1601 | /** |
1602 | * Filters a user's nicename before the user is created or updated. |
1603 | * |
1604 | * @since 2.0.3 |
1605 | * |
1606 | * @param string $user_nicename The user's nicename. |
1607 | */ |
1608 | $user_nicename = apply_filters( 'pre_user_nicename', $user_nicename ); |
1609 |
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1610 | $raw_user_url = empty( $userdata['user_url'] ) ? '' : $userdata['user_url']; |
1611 |
|
1612 | /** |
1613 | * Filters a user's URL before the user is created or updated. |
1614 | * |
1615 | * @since 2.0.3 |
1616 | * |
1617 | * @param string $raw_user_url The user's URL. |