Defined (1)

The function is defined in the following location(s).

/wp-includes/functions.php  

function wp_timezone_choice( $selected_zone, $locale = null ) { 
    static $mo_loaded = false, $locale_loaded = null; 
 
    $continents = array( 'Africa', 'America', 'Antarctica', 'Arctic', 'Asia', 'Atlantic', 'Australia', 'Europe', 'Indian', 'Pacific'); 
 
    // Loadtranslationsfor continents and cities. 
    if ( ! $mo_loaded || $locale !== $locale_loaded ) { 
        $locale_loaded = $locale ? $locale : get_locale(); 
        $mofile = WP_LANG_DIR . '/continents-cities-' . $locale_loaded . '.mo'; 
        unload_textdomain( 'continents-cities' ); 
        load_textdomain( 'continents-cities', $mofile ); 
        $mo_loaded = true; 
    } 
 
    $zonen = array(); 
    foreach ( timezone_identifiers_list() as $zone ) { 
        $zone = explode( '/', $zone ); 
        if ( !in_array( $zone[0], $continents ) ) { 
            continue; 
        } 
 
        // This determines what gets set and translated - we don't translate Etc/* strings here, they are done later 
        $exists = array( 
            0 => ( isset( $zone[0] ) && $zone[0] ),  
            1 => ( isset( $zone[1] ) && $zone[1] ),  
            2 => ( isset( $zone[2] ) && $zone[2] ),  
 ); 
        $exists[3] = ( $exists[0] && 'Etc' !== $zone[0] ); 
        $exists[4] = ( $exists[1] && $exists[3] ); 
        $exists[5] = ( $exists[2] && $exists[3] ); 
 
        $zonen[] = array( 
            'continent' => ( $exists[0] ? $zone[0] : '' ),  
            'city' => ( $exists[1] ? $zone[1] : '' ),  
            'subcity' => ( $exists[2] ? $zone[2] : '' ),  
            't_continent' => ( $exists[3] ? translate( str_replace( '_', ' ', $zone[0] ), 'continents-cities' ) : '' ),  
            't_city' => ( $exists[4] ? translate( str_replace( '_', ' ', $zone[1] ), 'continents-cities' ) : '' ),  
            't_subcity' => ( $exists[5] ? translate( str_replace( '_', ' ', $zone[2] ), 'continents-cities' ) : '' ) 
 ); 
    } 
    usort( $zonen, '_wp_timezone_choice_usort_callback' ); 
 
    $structure = array(); 
 
    if ( empty( $selected_zone ) ) { 
        $structure[] = '<option selected="selected" value="">' . __( 'Select a city' ) . '</option>'; 
    } 
 
    foreach ( $zonen as $key => $zone ) { 
        // Build value in an array to join later 
        $value = array( $zone['continent'] ); 
 
        if ( empty( $zone['city'] ) ) { 
            // It's at the continent level (generally won't happen) 
            $display = $zone['t_continent']; 
        } else { 
            // It's inside a continent group 
 
            // Continent optgroup 
            if ( !isset( $zonen[$key - 1] ) || $zonen[$key - 1]['continent'] !== $zone['continent'] ) { 
                $label = $zone['t_continent']; 
                $structure[] = '<optgroup label="'. esc_attr( $label ) .'">'; 
            } 
 
            // Add the city to the value 
            $value[] = $zone['city']; 
 
            $display = $zone['t_city']; 
            if ( !empty( $zone['subcity'] ) ) { 
                // Add the subcity to the value 
                $value[] = $zone['subcity']; 
                $display .= ' - ' . $zone['t_subcity']; 
            } 
        } 
 
        // Build the value 
        $value = join( '/', $value ); 
        $selected = ''; 
        if ( $value === $selected_zone ) { 
            $selected = 'selected="selected" '; 
        } 
        $structure[] = '<option ' . $selected . 'value="' . esc_attr( $value ) . '">' . esc_html( $display ) . "</option>"; 
 
        // Close continent optgroup 
        if ( !empty( $zone['city'] ) && ( !isset($zonen[$key + 1]) || (isset( $zonen[$key + 1] ) && $zonen[$key + 1]['continent'] !== $zone['continent']) ) ) { 
            $structure[] = '</optgroup>'; 
        } 
    } 
 
    // Do UTC 
    $structure[] = '<optgroup label="'. esc_attr__( 'UTC' ) .'">'; 
    $selected = ''; 
    if ( 'UTC' === $selected_zone ) 
        $selected = 'selected="selected" '; 
    $structure[] = '<option ' . $selected . 'value="' . esc_attr( 'UTC' ) . '">' . __('UTC') . '</option>'; 
    $structure[] = '</optgroup>'; 
 
    // Do manual UTC offsets 
    $structure[] = '<optgroup label="'. esc_attr__( 'Manual Offsets' ) .'">'; 
    $offset_range = array (-12, -11.5, -11, -10.5, -10, -9.5, -9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.5, -3, -2.5, -2, -1.5, -1, -0.5,  
        0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 5.75, 6, 6.5, 7, 7.5, 8, 8.5, 8.75, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.75, 13, 13.75, 14); 
    foreach ( $offset_range as $offset ) { 
        if ( 0 <= $offset ) 
            $offset_name = '+' . $offset; 
        else 
            $offset_name = (string) $offset; 
 
        $offset_value = $offset_name; 
        $offset_name = str_replace(array('.25', '.5', '.75'), array(':15', ':30', ':45'), $offset_name); 
        $offset_name = 'UTC' . $offset_name; 
        $offset_value = 'UTC' . $offset_value; 
        $selected = ''; 
        if ( $offset_value === $selected_zone ) 
            $selected = 'selected="selected" '; 
        $structure[] = '<option ' . $selected . 'value="' . esc_attr( $offset_value ) . '">' . esc_html( $offset_name ) . "</option>"; 
 
    } 
    $structure[] = '</optgroup>'; 
 
    return join( "\n", $structure ); 
}