Source View: pre_{$field}

To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).

Understanding Source Code

The best way to understand what a hook does is to look at where it occurs in the source code.

  • Action hooks look like this: do_action( "hook_name" )
  • Filter hooks look like this: 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.

Source View

Line Code
2008                 * Filters the value of a specific post field before saving.
2009                 *
2010                 * The dynamic portion of the hook name, `$field`, refers to the post
2011                 * field name.
2012                 *
2013                 * @since 2.3.0
2014                 *
2015                 * @param mixed $value Value of the post field.
2016                 */
2017                $value = apply_filters( "pre_{$field}", $value );
2018
2019                /**
2020                 * Filters the value of a specific field before saving.
2021                 *
2022                 * The dynamic portion of the hook name, `$field_no_prefix`, refers
2023                 * to the post field name.
2024                 *
2025                 * @since 2.3.0
2026                 *