name = 'checkbox';
$this->label = __( 'Checkbox', 'acf' );
$this->category = 'choice';
$this->description = __( 'A group of checkbox inputs that allow the user to select one, or multiple values that you specify.', 'acf' );
$this->preview_image = acf_get_url() . '/assets/images/field-type-previews/field-preview-checkbox.png';
$this->doc_url = acf_add_url_utm_tags( 'https://www.advancedcustomfields.com/resources/checkbox/', 'docs', 'field-type-selection' );
$this->defaults = array(
'layout' => 'vertical',
'choices' => array(),
'default_value' => '',
'allow_custom' => 0,
'save_custom' => 0,
'toggle' => 0,
'return_format' => 'value',
'custom_choice_button_text' => __( 'Add new choice', 'acf' ),
);
}
/*
* render_field()
*
* Create the HTML interface for your field
*
* @param $field (array) the $field being rendered
*
* @type action
* @since 3.6
* @date 23/01/13
*
* @param $field (array) the $field being edited
* @return n/a
*/
function render_field( $field ) {
// reset vars
$this->_values = array();
$this->_all_checked = true;
// ensure array
$field['value'] = acf_get_array( $field['value'] );
$field['choices'] = acf_get_array( $field['choices'] );
// hiden input
acf_hidden_input( array( 'name' => $field['name'] ) );
// vars
$li = '';
$ul = array(
'class' => 'acf-checkbox-list',
);
// append to class
$ul['class'] .= ' ' . ( $field['layout'] == 'horizontal' ? 'acf-hl' : 'acf-bl' );
$ul['class'] .= ' ' . $field['class'];
// checkbox saves an array
$field['name'] .= '[]';
// choices
if ( ! empty( $field['choices'] ) ) {
// choices
$li .= $this->render_field_choices( $field );
// toggle
if ( $field['toggle'] ) {
$li = $this->render_field_toggle( $field ) . $li;
}
}
// custom
if ( $field['allow_custom'] ) {
$li .= $this->render_field_custom( $field );
}
// return
echo '' . "\n";
}
/*
* render_field_choices
*
* description
*
* @type function
* @date 15/7/17
* @since 5.6.0
*
* @param $post_id (int)
* @return $post_id (int)
*/
function render_field_choices( $field ) {
// walk
return $this->walk( $field['choices'], $field );
}
/**
* Validates values for the checkbox field
*
* @date 09/12/2022
* @since 6.0.0
*
* @param bool $valid If the field is valid.
* @param mixed $value The value to validate.
* @param array $field The main field array.
* @param string $input The input element's name attribute.
*
* @return bool
*/
function validate_value( $valid, $value, $field, $input ) {
if ( ! is_array( $value ) || empty( $field['allow_custom'] ) ) {
return $valid;
}
foreach ( $value as $value ) {
if ( empty( $value ) && $value !== '0' ) {
return __( 'Checkbox custom values cannot be empty. Uncheck any empty values.', 'acf' );
}
}
return $valid;
}
/*
* render_field_toggle
*
* description
*
* @type function
* @date 15/7/17
* @since 5.6.0
*
* @param $post_id (int)
* @return $post_id (int)
*/
function render_field_toggle( $field ) {
// vars
$atts = array(
'type' => 'checkbox',
'class' => 'acf-checkbox-toggle',
'label' => __( 'Toggle All', 'acf' ),
);
// custom label
if ( is_string( $field['toggle'] ) ) {
$atts['label'] = $field['toggle'];
}
// checked
if ( $this->_all_checked ) {
$atts['checked'] = 'checked';
}
// return
return '' . acf_get_checkbox_input( $atts ) . '' . "\n";
}
/*
* render_field_custom
*
* description
*
* @type function
* @date 15/7/17
* @since 5.6.0
*
* @param $post_id (int)
* @return $post_id (int)
*/
function render_field_custom( $field ) {
// vars
$html = '';
// loop
foreach ( $field['value'] as $value ) {
// ignore if already eixsts
if ( isset( $field['choices'][ $value ] ) ) {
continue;
}
// vars
$esc_value = esc_attr( $value );
$text_input = array(
'name' => $field['name'],
'value' => $value,
);
// bail early if choice already exists
if ( in_array( $esc_value, $this->_values ) ) {
continue;
}
// append
$html .= '' . acf_get_text_input( $text_input ) . '' . "\n";
}
// append button
$html .= '' . esc_attr( $field['custom_choice_button_text'] ) . '' . "\n";
// return
return $html;
}
function walk( $choices = array(), $args = array(), $depth = 0 ) {
// bail early if no choices
if ( empty( $choices ) ) {
return '';
}
// defaults
$args = wp_parse_args(
$args,
array(
'id' => '',
'type' => 'checkbox',
'name' => '',
'value' => array(),
'disabled' => array(),
)
);
// vars
$html = '';
// sanitize values for 'selected' matching
if ( $depth == 0 ) {
$args['value'] = array_map( 'esc_attr', $args['value'] );
$args['disabled'] = array_map( 'esc_attr', $args['disabled'] );
}
// loop
foreach ( $choices as $value => $label ) {
// open
$html .= '';
// optgroup
if ( is_array( $label ) ) {
$html .= '' . "\n";
$html .= $this->walk( $label, $args, $depth + 1 );
$html .= '
';
// option
} else {
// vars
$esc_value = esc_attr( $value );
$atts = array(
'id' => $args['id'] . '-' . str_replace( ' ', '-', $value ),
'type' => $args['type'],
'name' => $args['name'],
'value' => $value,
'label' => $label,
);
// selected
if ( in_array( $esc_value, $args['value'] ) ) {
$atts['checked'] = 'checked';
} else {
$this->_all_checked = false;
}
// disabled
if ( in_array( $esc_value, $args['disabled'] ) ) {
$atts['disabled'] = 'disabled';
}
// store value added
$this->_values[] = $esc_value;
// append
$html .= acf_get_checkbox_input( $atts );
}
// close
$html .= '' . "\n";
}
// return
return $html;
}
/*
* render_field_settings()
*
* Create extra options for your field. This is rendered when editing a field.
* The value of $field['name'] can be used (like bellow) to save extra data to the $field
*
* @type action
* @since 3.6
* @date 23/01/13
*
* @param $field - an array holding all the field's data
*/
function render_field_settings( $field ) {
// Encode choices (convert from array).
$field['choices'] = acf_encode_choices( $field['choices'] );
$field['default_value'] = acf_encode_choices( $field['default_value'], false );
acf_render_field_setting(
$field,
array(
'label' => __( 'Choices', 'acf' ),
'instructions' => __( 'Enter each choice on a new line.', 'acf' ) . '
' . __( 'For more control, you may specify both a value and label like this:', 'acf' ) . '
' . __( 'red : Red', 'acf' ) . '',
'type' => 'textarea',
'name' => 'choices',
)
);
acf_render_field_setting(
$field,
array(
'label' => __( 'Default Value', 'acf' ),
'instructions' => __( 'Enter each default value on a new line', 'acf' ),
'type' => 'textarea',
'name' => 'default_value',
)
);
acf_render_field_setting(
$field,
array(
'label' => __( 'Return Value', 'acf' ),
'instructions' => __( 'Specify the returned value on front end', 'acf' ),
'type' => 'radio',
'name' => 'return_format',
'layout' => 'horizontal',
'choices' => array(
'value' => __( 'Value', 'acf' ),
'label' => __( 'Label', 'acf' ),
'array' => __( 'Both (Array)', 'acf' ),
),
)
);
}
/**
* Renders the field settings used in the "Validation" tab.
*
* @since 6.0
*
* @param array $field The field settings array.
* @return void
*/
function render_field_validation_settings( $field ) {
acf_render_field_setting(
$field,
array(
'label' => __( 'Allow Custom Values', 'acf' ),
'name' => 'allow_custom',
'type' => 'true_false',
'ui' => 1,
'instructions' => __( "Allow 'custom' values to be added", 'acf' ),
)
);
acf_render_field_setting(
$field,
array(
'label' => __( 'Save Custom Values', 'acf' ),
'name' => 'save_custom',
'type' => 'true_false',
'ui' => 1,
'instructions' => __( "Save 'custom' values to the field's choices", 'acf' ),
'conditions' => array(
'field' => 'allow_custom',
'operator' => '==',
'value' => 1,
),
)
);
}
/**
* Renders the field settings used in the "Presentation" tab.
*
* @since 6.0
*
* @param array $field The field settings array.
* @return void
*/
function render_field_presentation_settings( $field ) {
acf_render_field_setting(
$field,
array(
'label' => __( 'Layout', 'acf' ),
'instructions' => '',
'type' => 'radio',
'name' => 'layout',
'layout' => 'horizontal',
'choices' => array(
'vertical' => __( 'Vertical', 'acf' ),
'horizontal' => __( 'Horizontal', 'acf' ),
),
)
);
acf_render_field_setting(
$field,
array(
'label' => __( 'Add Toggle All', 'acf' ),
'instructions' => __( 'Prepend an extra checkbox to toggle all choices', 'acf' ),
'name' => 'toggle',
'type' => 'true_false',
'ui' => 1,
)
);
}
/*
* update_field()
*
* This filter is appied to the $field before it is saved to the database
*
* @type filter
* @since 3.6
* @date 23/01/13
*
* @param $field - the field array holding all the field options
* @param $post_id - the field group ID (post_type = acf)
*
* @return $field - the modified field
*/
function update_field( $field ) {
// Decode choices (convert to array).
$field['choices'] = acf_decode_choices( $field['choices'] );
$field['default_value'] = acf_decode_choices( $field['default_value'], true );
return $field;
}
/*
* 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 ) {
// bail early if is empty
if ( empty( $value ) ) {
return $value;
}
// select -> update_value()
$value = acf_get_field_type( 'select' )->update_value( $value, $post_id, $field );
// save_other_choice
if ( $field['save_custom'] ) {
// get raw $field (may have been changed via repeater field)
// if field is local, it won't have an ID
$selector = $field['ID'] ? $field['ID'] : $field['key'];
$field = acf_get_field( $selector );
if ( ! $field ) {
return false;
}
// bail early if no ID (JSON only)
if ( ! $field['ID'] ) {
return $value;
}
// loop
foreach ( $value as $v ) {
// ignore if already eixsts
if ( isset( $field['choices'][ $v ] ) ) {
continue;
}
// unslash (fixes serialize single quote issue)
$v = wp_unslash( $v );
// sanitize (remove tags)
$v = sanitize_text_field( $v );
// append
$field['choices'][ $v ] = $v;
}
// save
acf_update_field( $field );
}
// return
return $value;
}
/*
* translate_field
*
* This function will translate field settings
*
* @type function
* @date 8/03/2016
* @since 5.3.2
*
* @param $field (array)
* @return $field
*/
function translate_field( $field ) {
return acf_get_field_type( 'select' )->translate_field( $field );
}
/*
* 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 is empty.
if ( acf_is_empty( $value ) ) {
return array();
}
// Always convert to array of items.
$value = acf_array( $value );
// Return.
return acf_get_field_type( 'select' )->format_value( $value, $post_id, $field );
}
/**
* Return the schema array for the REST API.
*
* @param array $field
* @return array
*/
public function get_rest_schema( array $field ) {
$schema = array(
'type' => array( 'integer', 'string', 'array', 'null' ),
'required' => isset( $field['required'] ) && $field['required'],
'items' => array(
'type' => array( 'string', 'integer' ),
),
);
if ( isset( $field['default_value'] ) && '' !== $field['default_value'] ) {
$schema['default'] = $field['default_value'];
}
// If we allow custom values, nothing else to do here.
if ( ! empty( $field['allow_custom'] ) ) {
return $schema;
}
$schema['items']['enum'] = acf_get_field_type( 'select' )->format_rest_choices( $field['choices'] );
return $schema;
}
}
// initialize
acf_register_field_type( 'acf_field_checkbox' );
endif; // class_exists check