Wordpress Date() and StrToTime() Functions

wordpress-date.php

<?php

function wp_date_localised($format, $timestamp = null) {
  // This function behaves a bit like PHP's Date() function, but taking into account the Wordpress site's timezone
  // CAUTION: It will throw an exception when it receives invalid input - please catch it accordingly
  // From https://mediarealm.com.au/
  
  $tz_string = get_option('timezone_string');
  $tz_offset = get_option('gmt_offset', 0);
  
  if (!empty($tz_string)) {
      // If site timezone option string exists, use it
      $timezone = $tz_string;
  
  } elseif ($tz_offset == 0) {
      // get UTC offset, if it isn’t set then return UTC
      $timezone = 'UTC';
  
  } else {
      $timezone = $tz_offset;
      
      if(substr($tz_offset, 0, 1) != "-" && substr($tz_offset, 0, 1) != "+" && substr($tz_offset, 0, 1) != "U") {
          $timezone = "+" . $tz_offset;
      }
  }
  
  if($timestamp === null) {
    $timestamp = time();
  }
  
  $datetime = new DateTime();
  $datetime->setTimestamp($timestamp);
  $datetime->setTimezone(new DateTimeZone($timezone));
  return $datetime->format($format);
}

?>

wordpress-strtotime.php

<?php

function wp_strtotime($str) {
  // This function behaves a bit like PHP's StrToTime() function, but taking into account the Wordpress site's timezone
  // CAUTION: It will throw an exception when it receives invalid input - please catch it accordingly
  // From https://mediarealm.com.au/
  
  $tz_string = get_option('timezone_string');
  $tz_offset = get_option('gmt_offset', 0);
  
  if (!empty($tz_string)) {
      // If site timezone option string exists, use it
      $timezone = $tz_string;
  
  } elseif ($tz_offset == 0) {
      // get UTC offset, if it isn’t set then return UTC
      $timezone = 'UTC';
  
  } else {
      $timezone = $tz_offset;
      
      if(substr($tz_offset, 0, 1) != "-" && substr($tz_offset, 0, 1) != "+" && substr($tz_offset, 0, 1) != "U") {
          $timezone = "+" . $tz_offset;
      }
  }
  
  $datetime = new DateTime($str, new DateTimeZone($timezone));
  return $datetime->format('U');
}

?>

Hey - WP has a helper to get a DateTimeZone instance from the current timezone settings in WP. Should make these functions considerably easier to read/maintain. And wp_date() now exists in WP Core :)

function wp_strtotime($str) {
    $datetime = new DateTime($str, wp_timezone());
    return $datetime->format('U');
}

act like strtotime when invalid format what about

function wp_strtotime($str) {
         try {
            $datetime = new DateTime($str, wp_timezone());
         } catch (Exception $e)  {
            return false;
       }
       return $datetime->format('U');
    } 

Or

function wp_strtotime($str) {
    return strtotime( wp_date( 'Y-m-d H:i:s', strtotime( $str ) ) );
}

Hi @alewolf,

Yes, that's much easier and better these days. My functions were written before any of this landed in WP Core - years ago now! I might have to update this for the benefit of people coming across it these days.