__( 'Return Value', 'acf' ),
'instructions' => __( 'Specify the returned value on front end', 'acf' ),
'type' => 'radio',
'name' => 'return_format',
'layout' => 'horizontal',
'choices' => array(
'array' => __( 'Link Array', 'acf' ),
'url' => __( 'Link URL', 'acf' ),
),
)
);
}
/*
* format_value()
*
* This filter is appied to the $value after it is loaded from the db and before it is returned to the template
*
* @type filter
* @since 3.6
* @date 23/01/13
*
* @param $value (mixed) the value which was loaded from the database
* @param $post_id (mixed) the $post_id from which the value was loaded
* @param $field (array) the field array holding all the field options
*
* @return $value (mixed) the modified value
*/
function format_value( $value, $post_id, $field ) {
// bail early if no value
if ( empty( $value ) ) {
return $value;
}
// get link
$link = $this->get_link( $value );
// format value
if ( $field['return_format'] == 'url' ) {
return $link['url'];
}
// return link
return $link;
}
/*
* validate_value
*
* description
*
* @type function
* @date 11/02/2014
* @since 5.0.0
*
* @param $post_id (int)
* @return $post_id (int)
*/
function validate_value( $valid, $value, $field, $input ) {
// bail early if not required
if ( ! $field['required'] ) {
return $valid;
}
// URL is required
if ( empty( $value ) || empty( $value['url'] ) ) {
return false;
}
// return
return $valid;
}
/*
* update_value()
*
* This filter is appied to the $value before it is updated in the db
*
* @type filter
* @since 3.6
* @date 23/01/13
*
* @param $value - the value which will be saved in the database
* @param $post_id - the $post_id of which the value will be saved
* @param $field - the field array holding all the field options
*
* @return $value - the modified value
*/
function update_value( $value, $post_id, $field ) {
// Check if value is an empty array and convert to empty string.
if ( empty( $value ) || empty( $value['url'] ) ) {
$value = '';
}
// return
return $value;
}
/**
* Return the schema array for the REST API.
*
* @param array $field
* @return array
*/
public function get_rest_schema( array $field ) {
return array(
'type' => array( 'object', 'null' ),
'required' => ! empty( $field['required'] ),
'properties' => array(
'title' => array(
'type' => 'string',
),
'url' => array(
'type' => 'string',
'required' => true,
'format' => 'uri',
),
'target' => array(
'type' => 'string',
),
),
);
}
}
// initialize
acf_register_field_type( 'acf_field_link' );
endif; // class_exists check
?>