<field>_pre

Filters the value of a specific post field before saving.

Description

apply_filters( '<field>_pre', (mixed) $value ); 

The dynamic portion(s) of the hook name refer to the post field name.

Parameters (1)

0. $value (mixed)
Value of the post field.

Usage

To run the hook, copy the example below.
  1. $value = apply_filters( '{$field}_pre', $value ); 
  2.  
  3. if ( !empty( $value ) ) { 
  4.  
  5. // everything has led up to this point... 
  6.  
  7.  
The following example is for adding a hook callback.
  1. // define the <field>_pre callback 
  2. function filter_field_pre( $value ) { 
  3. // make filter magic happen here... 
  4. return $value
  5. }; 
  6.  
  7. // add the filter 
  8. add_filter( "{$field}_pre", 'filter_field_pre', 10, 1 ); 
To remove a hook callback, use the example below.
  1. // remove the filter 
  2. remove_filter( "{$field}_pre", 'filter_field_pre', 10, 1 ); 

Defined (1)

The filter is defined in the following location(s).

/wp-includes/post.php  
  1. $value = apply_filters( "{$field}_pre", $value );