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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 |
---|---|
1738 | return $value; |
1739 | } |
1740 |
|
1741 | $prefixed = false !== strpos( $field, 'user_' ); |
1742 |
|
1743 | if ( 'edit' === $context ) { |
1744 | if ( $prefixed ) { |
1745 |
|
1746 | /** This filter is documented in wp-includes/post.php */ |
1747 | $value = apply_filters( "edit_{$field}", $value, $user_id ); |
1748 | } else { |
1749 |
|
1750 | /** |
1751 | * Filters a user field value in the 'edit' context. |
1752 | * |
1753 | * The dynamic portion of the hook name, `$field`, refers to the prefixed user |
1754 | * field being filtered, such as 'user_login', 'user_email', 'first_name', etc. |
1755 | * |
1756 | * @since 2.9.0 |