<?php
// exit if accessed directly
if ( ! defined( 'ABSPATH' ) )
exit;
/**
* Post_Views_Counter_Settings_API class.
*
* @class Post_Views_Counter_Settings_API
*/
class Post_Views_Counter_Settings_API {
private $settings = [];
private $input_settings = [];
private $validated_settings = [];
private $pages = [];
private $page_types = [];
private $prefix = '';
private $slug = '';
private $domain = '';
private $short = '';
private $plugin = '';
private $plugin_url = '';
private $object;
/**
* Class constructor.
*
* @return void
*/
public function __construct( $args ) {
// set initial data
$this->prefix = $args['prefix'];
$this->domain = $args['domain'];
// empty slug?
if ( empty( $args['slug'] ) )
$this->slug = $args['domain'];
else
$this->slug = $args['slug'];
// empty short name?
if ( empty( $args['short'] ) ) {
$short = '';
// prepare short name based on prefix
$parts = explode( '_', $this->prefix );
foreach ( $parts as $string ) {
$short .= substr( $string, 0, 1 );
}
// set short name
$this->short = $short;
} else
$this->short = $args['short'];
$this->object = $args['object'];
$this->plugin = $args['plugin'];
$this->plugin_url = $args['plugin_url'];
// actions
add_action( 'admin_menu', [ $this, 'admin_menu_options' ], 11 );
add_action( 'admin_init', [ $this, 'register_settings' ], 11 );
add_action( 'admin_enqueue_scripts', [ $this, 'admin_enqueue_scripts' ] );
}
/**
* Get prefix.
*
* @return string
*/
public function get_prefix() {
return $this->prefix;
}
/**
* Get pages.
*
* @return array
*/
public function get_pages() {
return $this->pages;
}
/**
* Get settings.
*
* @return array
*/
public function get_settings() {
return $this->settings;
}
/**
* Get current input settings during saving.
*
* @return array
*/
public function get_input_settings() {
return $this->input_settings;
}
/**
* Get already validated setting fields during saving.
*
* @return array
*/
public function get_validated_settings() {
return $this->validated_settings;
}
/**
* Load default scripts and styles.
*
* @return void
*/
public function admin_enqueue_scripts() {
$handler = $this->short . '-settings-api-style';
// register and enqueue styles
wp_register_style( $handler, false );
wp_enqueue_style( $handler );
// add styles
wp_add_inline_style( $handler, '.nav-tab-wrapper span.nav-span-disabled {
cursor: not-allowed;
float: left;
}
body.rtl .nav-tab-wrapper span.nav-span-disabled {
float: right;
}
.nav-tab-wrapper a.nav-tab.nav-tab-disabled {
pointer-events: none;
}
.nav-tab-wrapper a.nav-tab.nav-tab-disabled:hover {
cursor: not-allowed;
}' );
}
/**
* Add menu pages.
*
* @return void
*/
public function admin_menu_options() {
$this->pages = apply_filters( $this->prefix . '_settings_pages', [] );
$types = [
'page' => [],
'subpage' => [],
'settings_page' => []
];
foreach ( $this->pages as $page => $data ) {
// skip invalid page types
if ( empty( $data['type'] ) || ! array_key_exists( $data['type'], $types ) )
continue;
if ( $data['type'] === 'page' ) {
add_menu_page( $data['page_title'], $data['menu_title'], $data['capability'], $data['menu_slug'], ! empty( $data['callback'] ) ? $data['callback'] : [ $this, 'options_page' ], $data['icon'], $data['position'] );
// add page type
$types['page'][$data['menu_slug']] = $page;
// menu subpage?
} elseif ( $data['type'] === 'subpage' ) {
add_submenu_page( $data['parent_slug'], $data['page_title'], $data['menu_title'], $data['capability'], $data['menu_slug'], ! empty( $data['callback'] ) ? $data['callback'] : [ $this, 'options_page' ] );
// add subpage type
$types['subpage'][$data['menu_slug']] = $page;
// menu settings page?
} elseif ( $data['type'] === 'settings_page' ) {
add_options_page( $data['page_title'], $data['menu_title'], $data['capability'], $data['menu_slug'], ! empty( $data['callback'] ) ? $data['callback'] : [ $this, 'options_page' ] );
// add settings type
$types['settings_page'][$data['menu_slug']] = $page;
}
}
// set page types
$this->page_types = $types;
}
/**
* Render settings.
*
* @global string $pagenow
*
* @return void
*/
public function options_page() {
global $pagenow;
$valid_page = false;
// get current screen
$screen = get_current_screen();
// display top level settings page?
if ( $pagenow === 'admin.php' && preg_match( '/^toplevel_page_(' . implode( '|', $this->page_types['page'] ) . ')$/', $screen->base, $matches ) === 1 && ! empty( $matches[1] ) ) {
$valid_page = true;
$page_type = 'page';
$url_page = 'admin.php';
}
// display sub level settings page?
if ( ! $valid_page && $pagenow === 'admin.php' && preg_match( '/^(?:toplevel|' . $this->prefix . ')_page_' . $this->prefix . '-(' . implode( '|', $this->page_types['subpage'] ) . ')-settings$/', $screen->base, $matches ) === 1 && ! empty( $matches[1] ) ) {
$valid_page = true;
$page_type = 'subpage';
$url_page = 'admin.php';
}
// display settings page?
if ( ! $valid_page && $pagenow === 'options-general.php' && preg_match( '/^(?:settings_page_)(' . implode( '|', array_keys( $this->page_types['settings_page'] ) ) . ')$/', $screen->base, $matches ) === 1 ) {
$valid_page = true;
$page_type = 'settings_page';
$url_page = 'options-general.php';
}
// skip invalid pages
if ( ! $valid_page )
return;
echo '
<div class="wrap">
<h2>' . esc_html( $this->settings[$matches[1]]['label'] ) . '</h2>';
$tab_key = '';
// any tabs?
if ( array_key_exists( 'tabs', $this->pages[$this->page_types[$page_type][$matches[1]]] ) ) {
// get tabs
$tabs = $this->pages[$this->page_types[$page_type][$matches[1]]]['tabs'];
// reset tabs
reset( $tabs );
// get first default tab
$first_tab = key( $tabs );
// get current tab
$tab_key = ! empty( $_GET['tab'] ) && array_key_exists( $_GET['tab'], $tabs ) ? $_GET['tab'] : $first_tab;
// check current tab
if ( ! empty( $_GET['tab'] ) )
$tab_key = sanitize_key( $_GET['tab'] );
// invalid tab?
if ( ! array_key_exists( $tab_key, $tabs ) )
$tab_key = $first_tab;
echo '
<h2 class="nav-tab-wrapper">';
foreach ( $tabs as $key => $tab ) {
if ( ! empty( $tab['disabled'] ) )
$url = '';
else
$url = admin_url( $url_page . '?page=' . $matches[1] . '&tab=' . $key );
if ( ! empty( $tab['disabled'] ) )
echo '<span class="nav-span-disabled">';
echo '
<a class="nav-tab' . ( $tab_key === $key ? ' nav-tab-active' : '' ) . ( ! empty( $tab['disabled'] ) ? ' nav-tab-disabled' : '' ) . ( ! empty( $tab['class'] ) ? ' ' . esc_attr( $tab['class'] ) : '' ) . '" href="' . ( $url !== '' ? esc_url( $url ) : '#' ) . '">' . esc_html( $tab['label'] ) . '</a>';
if ( ! empty( $tab['disabled'] ) )
echo '</span>';
}
echo '
</h2>';
}
// skip for internal options page
if ( $page_type !== 'settings_page' )
settings_errors();
// get settings page classes
$settings_class = apply_filters( $this->prefix . '_settings_page_class', [ $this->slug . '-settings', $tab_key . '-settings' ] );
// sanitize settings page classes
$settings_class = array_unique( array_filter( array_map( 'sanitize_html_class', $settings_class ) ) );
echo '
<div class="' . implode( ' ', array_map( 'esc_attr', $settings_class ) ) . '">';
$display_form = true;
// check form attribute
if ( ! empty( $this->settings[$matches[1]]['form'] ) && ! empty( $tab_key ) && ! empty( $this->settings[$matches[1]]['form'][$tab_key] ) ) {
$form = $this->settings[$matches[1]]['form'][$tab_key];
if ( isset( $form['buttons'] ) && ! $form['buttons'] )
$display_form = false;
}
// any tabs?
if ( ! empty( $tab_key ) ) {
if ( ! empty( $tabs[$tab_key]['option_name'] ) )
$setting = $tabs[$tab_key]['option_name'];
else
$setting = $this->prefix . '_' . $tab_key . '_settings';
} else
$setting = $this->prefix . '_' . $matches[1] . '_settings';
do_action( $this->short . '_settings_sidebar', $setting, $page_type, $url_page, $tab_key );
if ( $display_form ) {
echo '
<form action="options.php" method="post">';
}
settings_fields( $setting );
if ( $display_form )
do_action( $this->short . '_settings_form', $setting, $page_type, $url_page, $tab_key );
do_settings_sections( $setting );
if ( $display_form ) {
echo '
<p class="submit">';
submit_button( '', 'primary', 'save_' . $setting, false );
echo ' ';
submit_button( __( 'Reset to defaults', $this->domain ), 'secondary reset_' . $setting . ' reset_' . $this->short . '_settings', 'reset_' . $setting, false );
echo '
</p>
</form>';
}
echo '
</div>
<div class="clear"></div>
</div>';
}
/**
* Register settings.
*
* @return void
*/
public function register_settings() {
$this->settings = apply_filters( $this->prefix . '_settings_data', [] );
// check settings
foreach ( $this->settings as $setting_id => $setting ) {
// tabs?
if ( is_array( $setting['option_name'] ) ) {
foreach ( $setting['option_name'] as $tab => $option_name ) {
$this->register_setting_fields( $tab, $setting, $option_name );
}
} else
$this->register_setting_fields( $setting_id, $setting );
}
}
/**
* Register setting with sections and fields.
*
* @return void
*/
public function register_setting_fields( $setting_id, $setting, $option_name = '' ) {
if ( empty( $option_name ) )
$option_name = $setting['option_name'];
// register setting
register_setting( $option_name, $option_name, ! empty( $setting['validate'] ) ? $setting['validate'] : [ $this, 'validate_settings' ] );
// register setting sections
if ( ! empty( $setting['sections'] ) ) {
foreach ( $setting['sections'] as $section_id => $section ) {
// skip unwanted sections
if ( ! empty( $section['tab'] ) && $section['tab'] !== $setting_id )
continue;
add_settings_section(
$section_id,
! empty( $section['title'] ) ? esc_html( $section['title'] ) : '',
! empty( $section['callback'] ) ? $section['callback'] : null,
! empty( $section['page'] ) ? $section['page'] : $option_name
);
}
}
// register setting fields
if ( ! empty( $setting['fields'] ) ) {
foreach ( $setting['fields'] as $field_key => $field ) {
// skip unwanted fields
if ( ! empty( $field['tab'] ) && $field['tab'] !== $setting_id )
continue;
// set field ID
$field_id = implode( '_', [ $this->prefix, $setting_id, $field_key ] );
// skip rendering this field?
if ( ! empty( $field['skip_rendering'] ) )
continue;
add_settings_field(
$field_id,
! empty( $field['title'] ) ? esc_html( $field['title'] ) : '',
[ $this, 'render_field' ],
$option_name,
! empty( $field['section'] ) ? esc_attr( $field['section'] ) : '',
array_merge( $this->prepare_field_args( $field, $field_id, $field_key, $setting_id, $option_name ), $field )
);
}
}
}
/**
* Prepare field arguments.
*
* @param array $args
* @return array
*/
public function prepare_field_args( $field, $field_id, $field_key, $setting_id, $setting_name ) {
// get field type
$field_type = ! empty( $field['type'] ) ? $field['type'] : '';
return [
'id' => $field_id,
'name' => $setting_name . '[' . $field_key . ']',
'class' => ! empty( $field['class'] ) ? $field['class'] : '',
'type' => $field_type,
'label' => ! empty( $field['label'] ) ? $field['label'] : '',
'description' => ! empty( $field['description'] ) ? $field['description'] : '',
'text' => ! empty( $field['text'] ) ? $field['text'] : '',
'min' => ! empty( $field['min'] ) ? (int) $field['min'] : 0,
'max' => ! empty( $field['max'] ) ? (int) $field['max'] : 0,
'options' => ! empty( $field['options'] ) ? $field['options'] : [],
'callback' => ! empty( $field['callback'] ) ? $field['callback'] : null,
'validate' => ! empty( $field['validate'] ) ? $field['validate'] : null,
'callback_args' => ! empty( $field['callback_args'] ) ? $field['callback_args'] : [],
'default' => $field_type !== 'custom' ? $this->object->defaults[$setting_id][$field_key] : null,
'value' => $field_type !== 'custom' ? $this->object->options[$setting_id][$field_key] : null
/*
after_field
before_field
*/
];
}
/**
* Render settings field.
*
* @param array $args
* @return void|string
*/
public function render_field( $args ) {
if ( empty( $args ) || ! is_array( $args ) )
return;
$html = '<div id="' . esc_attr( $args['id'] ) . '_setting"' . ( ! empty( $args['class'] ) ? ' class="' . esc_attr( $args['class'] ) . '"' : '' ) . '>';
if ( ! empty ( $args['before_field'] ) )
$html .= $args['before_field'];
switch ( $args['type'] ) {
case 'boolean':
if ( empty( $args['disabled'] ) )
$html .= '<input type="hidden" name="' . esc_attr( $args['name'] ) . '" value="false" />';
$html .= '<label><input id="' . esc_attr( $args['id'] ) . '" type="checkbox" name="' . esc_attr( $args['name'] ) . '" value="true" ' . checked( (bool) $args['value'], true, false ) . ' ' . disabled( empty( $args['disabled'] ), false, false ) . ' />' . esc_html( $args['label'] ) . '</label>';
break;
case 'radio':
foreach ( $args['options'] as $key => $name ) {
$html .= '<label for="' . esc_attr( $args['id'] . '_' . $key ) . '"><input id="' . esc_attr( $args['id'] . '_' . $key ) . '" type="radio" name="' . esc_attr( $args['name'] ) . '" value="' . esc_attr( $key ) . '" ' . checked( $key, $args['value'], false ) . ' ' . disabled( ! empty( $args['disabled'] ) && in_array ( $key, $args['disabled'], true ), true, false ) . ' />' . esc_html( $name ) . '</label> ';
}
break;
case 'checkbox':
// possible "empty" value
if ( $args['value'] === 'empty' )
$args['value'] = [];
$display_type = ! empty( $args['display_type'] ) && in_array( $args['display_type'], [ 'horizontal', 'vertical' ], true ) ? $args['display_type'] : 'horizontal';
$html .= '<input type="hidden" name="' . esc_attr( $args['name'] ) . '" value="empty" />';
foreach ( $args['options'] as $key => $name ) {
$html .= '<label><input id="' . esc_attr( $args['id'] . '_' . $key ) . '" type="checkbox" name="' . esc_attr( $args['name'] ) . '[]" value="' . esc_attr( $key ) . '" ' . checked( in_array( $key, $args['value'] ), true, false ) . ' ' . disabled( ! empty( $args['disabled'] ) && in_array ( $key, $args['disabled'], true ), true, false ) . ' />' . esc_html( $name ) . '</label>' . ( $display_type === 'horizontal' ? ' ' : '<br />' );
}
break;
case 'select':
$html .= '<select id="' . esc_attr( $args['id'] ) . '" name="' . esc_attr( $args['name'] ) . '" ' . disabled( empty( $args['disabled'] ), false, false ) . '/>';
foreach ( $args['options'] as $key => $name ) {
$html .= '<option value="' . esc_attr( $key ) . '" ' . selected( $args['value'], $key, false ) . '>' . esc_html( $name ) . '</option>';
}
$html .= '</select>';
break;
case 'range':
$html .= '<input id="' . esc_attr( $args['id'] . '_slider' ) . '" type="range" name="' . esc_attr( $args['name'] ) . '" value="' . esc_attr( $args['value'] ) . '" min="' . esc_attr( $args['min'] ) . '" max="' . esc_attr( $args['max'] ) . '" oninput="this.form.' . esc_attr( $args['id'] ) . '_range.value = this.value" /><output class="' . esc_attr( $this->slug ) . '-range" name="' . esc_attr( $args['id'] ) . '_range">' . ( (int) $args['value'] ) . '</output>';
break;
case 'number':
$html .= ( ! empty( $args['prepend'] ) ? wp_kses_post( $args['prepend'] ) : '' );
$html .= '<input id="' . $args['id'] . '" type="text" value="' . esc_attr( $args['value'] ) . '" name="' . esc_attr( $args['name'] ) . '" />';
$html .= ( ! empty( $args['append'] ) ? wp_kses_post( $args['append'] ) : '' );
break;
case 'custom':
$html .= call_user_func( $args['callback'], $args );
break;
case 'info':
$html .= '<span' . ( ! empty( $args['subclass'] ) ? ' class="' . esc_attr( $args['subclass'] ) . '"' : '' ) . '>' . esc_html( $args['text'] ) . '</span>';
break;
case 'class':
case 'input':
default:
$empty_disabled = empty( $args['disabled'] );
$html .= ( ! empty( $args['prepend'] ) ? wp_kses_post( $args['prepend'] ) : '' );
$html .= '<input id="' . $args['id'] . '"' . ( ! empty( $args['subclass'] ) ? ' class="' . esc_attr( $args['subclass'] ) . '"' : '' ) . ' type="text" value="' . esc_attr( $args['value'] ) . '" name="' . esc_attr( $args['name'] ) . '" ' . disabled( $empty_disabled, false, false ) . '/>';
$html .= ( ! empty( $args['append'] ) ? wp_kses_post( $args['append'] ) : '' );
if ( ! $empty_disabled )
$html .= '<input' . ( $empty_disabled ? '' : ' class="hidden"' ) . ' type="text" value="' . esc_attr( $args['value'] ) . '" name="' . esc_attr( $args['name'] ) . '">';
}
if ( ! empty ( $args['after_field'] ) )
$html .= $args['after_field'];
if ( ! empty ( $args['description'] ) )
$html .= '<p class="description">' . $args['description'] . '</p>';
$html .= '</div>';
if ( ! empty( $args['return'] ) )
return $html;
else
echo $html;
}
/**
* Validate settings field.
*
* @param mixed $value
* @param string $type
* @param array $args
* @return mixed
*/
public function validate_field( $value = null, $type = '', $args = [] ) {
if ( is_null( $value ) )
return null;
switch ( $type ) {
case 'boolean':
// possible value: 'true' or 'false'
$value = ( $value === 'true' || $value === true );
break;
case 'radio':
$value = is_array( $value ) ? $args['default'] : sanitize_key( $value );
// disallow disabled radios
if ( ! empty( $args['disabled'] ) && in_array( $value, $args['disabled'], true ) )
$value = $args['default'];
break;
case 'checkbox':
// possible value: 'empty' or array
if ( $value === 'empty' )
$value = [];
else {
if ( is_array( $value ) && ! empty( $value ) ) {
$value = array_map( 'sanitize_key', $value );
$values = [];
foreach ( $value as $single_value ) {
if ( array_key_exists( $single_value, $args['options'] ) )
$values[] = $single_value;
}
$value = $values;
} else
$value = [];
}
break;
case 'number':
$value = (int) $value;
// is value lower than?
if ( isset( $args['min'] ) && $value < $args['min'] )
$value = $args['min'];
// is value greater than?
if ( isset( $args['max'] ) && $value > $args['max'] )
$value = $args['max'];
break;
case 'info':
$value = '';
break;
case 'custom':
// do nothing
break;
case 'class':
$value = trim( $value );
// more than 1 class?
if ( strpos( $value, ' ' ) !== false ) {
// get unique valid HTML classes
$value = array_unique( array_filter( array_map( 'sanitize_html_class', explode( ' ', $value ) ) ) );
if ( ! empty( $value ) )
$value = implode( ' ', $value );
else
$value = '';
// single class
} else
$value = sanitize_html_class( $value, $args['default'] );
break;
case 'input':
case 'select':
default:
$value = is_array( $value ) ? array_map( 'sanitize_text_field', $value ) : sanitize_text_field( $value );
break;
}
return stripslashes_deep( $value );
}
/**
* Validate settings.
*
* @param array $input
* @return array
*/
public function validate_settings( $input ) {
// check capability
if ( ! current_user_can( 'manage_options' ) )
return $input;
// check option page
if ( empty( $_POST['option_page'] ) )
return $input;
// try to get setting name and ID
foreach ( $this->settings as $id => $setting ) {
// tabs?
if ( is_array( $setting['option_name'] ) ) {
foreach ( $setting['option_name'] as $tab => $option_name ) {
// found valid setting?
if ( $option_name === $_POST['option_page'] ) {
// assign setting ID
$setting_id = $tab;
// assign setting name
$setting_name = $option_name;
// assign setting key
$setting_key = $id;
// already found setting, no need to check the rest
break 2;
}
}
} else {
// found valid setting?
if ( $setting['option_name'] === $_POST['option_page'] ) {
// assign setting ID and key
$setting_key = $setting_id = $id;
// assign setting name
$setting_name = $setting['option_name'];
// already found setting, no need to check the rest
break;
}
}
}
// check setting id, no need to check $setting_name since it was at the same stage
if ( empty( $setting_id ) )
return $input;
// save settings
if ( isset( $_POST['save_' . $setting_name] ) ) {
$input = $this->validate_input_settings( $setting_id, $setting_key, $input );
add_settings_error( $setting_name, 'settings_saved', __( 'Settings saved.', $this->domain ), 'updated' );
// reset settings
} elseif ( isset( $_POST['reset_' . $setting_name] ) ) {
// get default values
$input = $this->object->defaults[$setting_id];
// check custom reset functions
if ( ! empty( $this->settings[$setting_key]['fields'] ) ) {
foreach ( $this->settings[$setting_key]['fields'] as $field_id => $field ) {
// skip invalid tab field if any
if ( ! empty( $field['tab'] ) && $field['tab'] !== $setting_id )
continue;
// custom reset function?
if ( ! empty( $field['reset'] ) ) {
// valid function? no need to check "else" since all default values are already set
if ( $this->callback_function_exists( $field['reset'] ) ) {
if ( $field['type'] === 'custom' )
$input = call_user_func( $field['reset'], $input, $field );
else
$input[$field_id] = call_user_func( $field['reset'], $input[$field_id], $field );
}
}
}
}
add_settings_error( $setting_name, 'settings_restored', __( 'Settings restored to defaults.', $this->domain ), 'updated' );
}
return $input;
}
/**
* Validate input settings.
*
* @param string $setting_id
* @param array $input
* @return array
*/
public function validate_input_settings( $setting_id, $setting_key, $input ) {
if ( ! empty( $this->settings[$setting_key]['fields'] ) ) {
foreach ( $this->settings[$setting_key]['fields'] as $field_id => $field ) {
// skip saving this field?
if ( ! empty( $field['skip_saving'] ) )
continue;
// skip invalid tab field if any
if ( ! empty( $field['tab'] ) && $field['tab'] !== $setting_id )
continue;
// custom validate function?
if ( ! empty( $field['validate'] ) ) {
// valid function?
if ( $this->callback_function_exists( $field['validate'] ) ) {
if ( $field['type'] === 'custom' )
$input = call_user_func( $field['validate'], $input, $field );
else
$input[$field_id] = isset( $input[$field_id] ) ? call_user_func( $field['validate'], $input[$field_id], $field ) : $this->object->defaults[$setting_id][$field_id];
} else
$input[$field_id] = $this->object->defaults[$setting_id][$field_id];
} else {
// field data?
if ( isset( $input[$field_id] ) ) {
// make sure default value is available
if ( ! isset( $field['default'] ) )
$field['default'] = $this->object->defaults[$setting_id][$field_id];
$input[$field_id] = $this->validate_field( $input[$field_id], $field['type'], $field );
} else
$input[$field_id] = $this->object->defaults[$setting_id][$field_id];
}
// update input data
$this->input_settings = $input;
// add this field as validated
$this->validated_settings[] = $field_id;
}
}
return $input;
}
/**
* Check whether callback is a valid function.
*
* @param string|array $callback
* @return bool
*/
public function callback_function_exists( $callback ) {
// function as array?
if ( is_array( $callback ) ) {
list( $object, $function ) = $callback;
// check function existence
$function_exists = method_exists( $object, $function );
// function as string?
} elseif ( is_string( $callback ) ) {
// check function existence
$function_exists = function_exists( $callback );
} else
$function_exists = false;
return $function_exists;
}
/**
* Get value based on minimum and maximum.
*
* @param array $data
* @param string $setting_name
* @param int $default
* @param int $min
* @param int $max
* @return void
*/
public function get_int_value( $data, $setting_name, $default, $min, $max ) {
// check existence of value
$value = array_key_exists( $setting_name, $data ) ? (int) $data[$setting_name] : $default;
if ( $value > $max || $value < $min )
$value = $default;
return $value;
}
}