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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 |
---|---|
1344 | } |
1345 |
|
1346 | if ( 'description' == $field ) |
1347 | $value = esc_html( $value ); // textarea_escaped? |
1348 | else |
1349 | $value = esc_attr($value); |
1350 | } else if ( 'db' == $context ) { |
1351 | if ( $prefixed ) { |
1352 | /** This filter is documented in wp-includes/post.php */ |
1353 | $value = apply_filters( "pre_{$field}", $value ); |
1354 | } else { |
1355 |
|
1356 | /** |
1357 | * Filter the value of a user field in the 'db' context. |
1358 | * |
1359 | * The dynamic portion of the hook name, $field, refers to the prefixed user |
1360 | * field being filtered, such as 'user_login', 'user_email', 'first_name', etc. |
1361 | * |
1362 | * @since 2.9.0 |