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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 |
|---|---|
| 1894 | * |
| 1895 | * The dynamic portion of the hook name, `$field`, refers to the prefixed user |
| 1896 | * field being filtered, such as 'user_login', 'user_email', 'first_name', etc. |
| 1897 | * |
| 1898 | * @since 2.9.0 |
| 1899 | * |
| 1900 | * @param mixed $value Value of the prefixed user field. |
| 1901 | * @param int $user_id User ID. |
| 1902 | */ |
| 1903 | $value = apply_filters( "edit_user_{$field}", $value, $user_id ); |
| 1904 | } |
| 1905 | |
| 1906 | if ( 'description' === $field ) { |
| 1907 | $value = esc_html( $value ); // textarea_escaped? |
| 1908 | } else { |
| 1909 | $value = esc_attr( $value ); |
| 1910 | } |
| 1911 | } elseif ( 'db' === $context ) { |
| 1912 | if ( $prefixed ) { |