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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 |
---|---|
1679 | $value = format_to_edit($value, user_can_richedit()); |
1680 | else |
1681 | $value = format_to_edit($value); |
1682 | } else { |
1683 | $value = esc_attr($value); |
1684 | } |
1685 | } else if ( 'db' == $context ) { |
1686 | if ( $prefixed ) { |
1687 | $value = apply_filters("pre_{$field}", $value); |
1688 | $value = apply_filters("{$field_no_prefix}_save_pre", $value); |
1689 | } else { |
1690 | $value = apply_filters("pre_post_{$field}", $value); |
1691 | $value = apply_filters("{$field}_pre", $value); |
1692 | } |
1693 | } else { |
1694 | // Use display filters by default. |
1695 | if ( $prefixed ) |
1696 | $value = apply_filters($field, $value, $post_id, $context); |
1697 | else |