<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.

$value = apply_filters( '{$field}_pre', $value ); 
                         
if ( !empty( $value ) ) { 
                         
   // everything has led up to this point... 
                         
} 
  

The following example is for adding a hook callback.

// define the <field>_pre callback 
function filter_field_pre( $value ) { 
    // make filter magic happen here... 
    return $value; 
}; 
         
// add the filter 
add_filter( "{$field}_pre", 'filter_field_pre', 10, 1 ); 

To remove a hook callback, use the example below.

// remove the filter 
remove_filter( "{$field}_pre", 'filter_field_pre', 10, 1 );