acf/pre_render_field │ filter-hook │ ACF 1.0

Usage

add_filter( 'acf/pre_render_field', 'wp_kama_acf_pre_render_field_filter', 10, 2 );

/**
 * Function for `acf/pre_render_field` filter-hook.
 * 
 * @param  $field   
 * @param  $post_id 
 *
 * @return 
 */
function wp_kama_acf_pre_render_field_filter( $field, $post_id ){

	// filter...
	return $field;
}

$field

-

$post_id

-

Where the hook is called

$field = apply_filters( 'acf/pre_render_field', $field, $post_id );

Where the hook is used in Advanced Custom Fields PRO