PHP Classes

File: system/helpers/date_helper.php

Recommend this page to a friend!
  Classes of Abed Nego Ragil Putra   PHP Attendance Management System using Fingerprint   system/helpers/date_helper.php   Download  
File: system/helpers/date_helper.php
Role: Example script
Content type: text/plain
Description: Example script
Class: PHP Attendance Management System using Fingerprint
Keep track of employee attendance with fingerprint
Author: By
Last change: improve feature, now with datables, fix some bugs

improve feature, now with datables, fix some bugs
Date: 11 months ago
Size: 20,628 bytes
 

Contents

Class file image Download
<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Date Helpers * * @package CodeIgniter * @subpackage Helpers * @category Helpers * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/helpers/date_helper.html */ // ------------------------------------------------------------------------ if (!function_exists('now')) { /** * Get "now" time * * Returns time() based on the timezone parameter or on the * "time_reference" setting * * @param string * @return int */ function now($timezone = NULL) { if (empty($timezone)) { $timezone = config_item('time_reference'); } if ($timezone === 'local' OR $timezone === date_default_timezone_get()) { return time(); } $datetime = new DateTime('now', new DateTimeZone($timezone)); sscanf($datetime->format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second); return mktime($hour, $minute, $second, $month, $day, $year); } } // ------------------------------------------------------------------------ if (!function_exists('mdate')) { /** * Convert MySQL Style Datecodes * * This function is identical to PHPs date() function, * except that it allows date codes to be formatted using * the MySQL style, where each code letter is preceded * with a percent sign: %Y %m %d etc... * * The benefit of doing dates this way is that you don't * have to worry about escaping your text letters that * match the date codes. * * @param string * @param int * @return int */ function mdate($datestr = '', $time = '') { if ($datestr === '') { return ''; } elseif (empty($time)) { $time = now(); } $datestr = str_replace( '%\\', '', preg_replace('/([a-z]+?){1}/i', '\\\\\\1', $datestr) ); return date($datestr, $time); } } // ------------------------------------------------------------------------ if (!function_exists('standard_date')) { /** * Standard Date * * Returns a date formatted according to the submitted standard. * * As of PHP 5.2, the DateTime extension provides constants that * serve for the exact same purpose and are used with date(). * * @todo Remove in version 3.1+. * @deprecated 3.0.0 Use PHP's native date() instead. * @link http://www.php.net/manual/en/class.datetime.php#datetime.constants.types * * @example date(DATE_RFC822, now()); // default * @example date(DATE_W3C, $time); // a different format and time * * @param string $fmt = 'DATE_RFC822' the chosen format * @param int $time = NULL Unix timestamp * @return string */ function standard_date($fmt = 'DATE_RFC822', $time = NULL) { if (empty($time)) { $time = now(); } // Procedural style pre-defined constants from the DateTime extension if (strpos($fmt, 'DATE_') !== 0 OR defined($fmt) === FALSE) { return FALSE; } return date(constant($fmt), $time); } } // ------------------------------------------------------------------------ if (!function_exists('timespan')) { /** * Timespan * * Returns a span of seconds in this format: * 10 days 14 hours 36 minutes 47 seconds * * @param int a number of seconds * @param int Unix timestamp * @param int a number of display units * @return string */ function timespan($seconds = 1, $time = '', $units = 7) { $CI =& get_instance(); $CI->lang->load('date'); is_numeric($seconds) OR $seconds = 1; is_numeric($time) OR $time = time(); is_numeric($units) OR $units = 7; $seconds = ($time <= $seconds) ? 1 : $time - $seconds; $str = array(); $years = floor($seconds / 31557600); if ($years > 0) { $str[] = $years . ' ' . $CI->lang->line($years > 1 ? 'date_years' : 'date_year'); } $seconds -= $years * 31557600; $months = floor($seconds / 2629743); if (count($str) < $units && ($years > 0 OR $months > 0)) { if ($months > 0) { $str[] = $months . ' ' . $CI->lang->line($months > 1 ? 'date_months' : 'date_month'); } $seconds -= $months * 2629743; } $weeks = floor($seconds / 604800); if (count($str) < $units && ($years > 0 OR $months > 0 OR $weeks > 0)) { if ($weeks > 0) { $str[] = $weeks . ' ' . $CI->lang->line($weeks > 1 ? 'date_weeks' : 'date_week'); } $seconds -= $weeks * 604800; } $days = floor($seconds / 86400); if (count($str) < $units && ($months > 0 OR $weeks > 0 OR $days > 0)) { if ($days > 0) { $str[] = $days . ' ' . $CI->lang->line($days > 1 ? 'date_days' : 'date_day'); } $seconds -= $days * 86400; } $hours = floor($seconds / 3600); if (count($str) < $units && ($days > 0 OR $hours > 0)) { if ($hours > 0) { $str[] = $hours . ' ' . $CI->lang->line($hours > 1 ? 'date_hours' : 'date_hour'); } $seconds -= $hours * 3600; } $minutes = floor($seconds / 60); if (count($str) < $units && ($days > 0 OR $hours > 0 OR $minutes > 0)) { if ($minutes > 0) { $str[] = $minutes . ' ' . $CI->lang->line($minutes > 1 ? 'date_minutes' : 'date_minute'); } $seconds -= $minutes * 60; } if (count($str) === 0) { $str[] = $seconds . ' ' . $CI->lang->line($seconds > 1 ? 'date_seconds' : 'date_second'); } return implode(', ', $str); } } // ------------------------------------------------------------------------ if (!function_exists('days_in_month')) { /** * Number of days in a month * * Takes a month/year as input and returns the number of days * for the given month/year. Takes leap years into consideration. * * @param int a numeric month * @param int a numeric year * @return int */ function days_in_month($month = 0, $year = '') { if ($month < 1 OR $month > 12) { return 0; } elseif (!is_numeric($year) OR strlen($year) !== 4) { $year = date('Y'); } if (defined('CAL_GREGORIAN')) { return cal_days_in_month(CAL_GREGORIAN, $month, $year); } if ($year >= 1970) { return (int)date('t', mktime(12, 0, 0, $month, 1, $year)); } if ($month == 2) { if ($year % 400 === 0 OR ($year % 4 === 0 && $year % 100 !== 0)) { return 29; } } $days_in_month = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); return $days_in_month[$month - 1]; } } // ------------------------------------------------------------------------ if (!function_exists('local_to_gmt')) { /** * Converts a local Unix timestamp to GMT * * @param int Unix timestamp * @return int */ function local_to_gmt($time = '') { if ($time === '') { $time = time(); } return mktime( gmdate('G', $time), gmdate('i', $time), gmdate('s', $time), gmdate('n', $time), gmdate('j', $time), gmdate('Y', $time) ); } } // ------------------------------------------------------------------------ if (!function_exists('gmt_to_local')) { /** * Converts GMT time to a localized value * * Takes a Unix timestamp (in GMT) as input, and returns * at the local value based on the timezone and DST setting * submitted * * @param int Unix timestamp * @param string timezone * @param bool whether DST is active * @return int */ function gmt_to_local($time = '', $timezone = 'UTC', $dst = FALSE) { if ($time === '') { return now(); } $time += timezones($timezone) * 3600; return ($dst === TRUE) ? $time + 3600 : $time; } } // ------------------------------------------------------------------------ if (!function_exists('mysql_to_unix')) { /** * Converts a MySQL Timestamp to Unix * * @param int MySQL timestamp YYYY-MM-DD HH:MM:SS * @return int Unix timstamp */ function mysql_to_unix($time = '') { // We'll remove certain characters for backward compatibility // since the formatting changed with MySQL 4.1 // YYYY-MM-DD HH:MM:SS $time = str_replace(array('-', ':', ' '), '', $time); // YYYYMMDDHHMMSS return mktime( substr($time, 8, 2), substr($time, 10, 2), substr($time, 12, 2), substr($time, 4, 2), substr($time, 6, 2), substr($time, 0, 4) ); } } // ------------------------------------------------------------------------ if (!function_exists('unix_to_human')) { /** * Unix to "Human" * * Formats Unix timestamp to the following prototype: 2006-08-21 11:35 PM * * @param int Unix timestamp * @param bool whether to show seconds * @param string format: us or euro * @return string */ function unix_to_human($time = '', $seconds = FALSE, $fmt = 'us') { $r = date('Y', $time) . '-' . date('m', $time) . '-' . date('d', $time) . ' '; if ($fmt === 'us') { $r .= date('h', $time) . ':' . date('i', $time); } else { $r .= date('H', $time) . ':' . date('i', $time); } if ($seconds) { $r .= ':' . date('s', $time); } if ($fmt === 'us') { return $r . ' ' . date('A', $time); } return $r; } } // ------------------------------------------------------------------------ if (!function_exists('human_to_unix')) { /** * Convert "human" date to GMT * * Reverses the above process * * @param string format: us or euro * @return int */ function human_to_unix($datestr = '') { if ($datestr === '') { return FALSE; } $datestr = preg_replace('/\040+/', ' ', trim($datestr)); if (!preg_match('/^(\d{2}|\d{4})\-[0-9]{1,2}\-[0-9]{1,2}\s[0-9]{1,2}:[0-9]{1,2}(?::[0-9]{1,2})?(?:\s[AP]M)?$/i', $datestr)) { return FALSE; } sscanf($datestr, '%d-%d-%d %s %s', $year, $month, $day, $time, $ampm); sscanf($time, '%d:%d:%d', $hour, $min, $sec); isset($sec) OR $sec = 0; if (isset($ampm)) { $ampm = strtolower($ampm); if ($ampm[0] === 'p' && $hour < 12) { $hour += 12; } elseif ($ampm[0] === 'a' && $hour === 12) { $hour = 0; } } return mktime($hour, $min, $sec, $month, $day, $year); } } // ------------------------------------------------------------------------ if (!function_exists('nice_date')) { /** * Turns many "reasonably-date-like" strings into something * that is actually useful. This only works for dates after unix epoch. * * @deprecated 3.1.3 Use DateTime::createFromFormat($input_format, $input)->format($output_format); * @param string The terribly formatted date-like string * @param string Date format to return (same as php date function) * @return string */ function nice_date($bad_date = '', $format = FALSE) { if (empty($bad_date)) { return 'Unknown'; } elseif (empty($format)) { $format = 'U'; } // Date like: YYYYMM if (preg_match('/^\d{6}$/i', $bad_date)) { if (in_array(substr($bad_date, 0, 2), array('19', '20'))) { $year = substr($bad_date, 0, 4); $month = substr($bad_date, 4, 2); } else { $month = substr($bad_date, 0, 2); $year = substr($bad_date, 2, 4); } return date($format, strtotime($year . '-' . $month . '-01')); } // Date Like: YYYYMMDD if (preg_match('/^\d{8}$/i', $bad_date, $matches)) { return DateTime::createFromFormat('Ymd', $bad_date)->format($format); } // Date Like: MM-DD-YYYY __or__ M-D-YYYY (or anything in between) if (preg_match('/^(\d{1,2})-(\d{1,2})-(\d{4})$/i', $bad_date, $matches)) { return date($format, strtotime($matches[3] . '-' . $matches[1] . '-' . $matches[2])); } // Any other kind of string, when converted into UNIX time, // produces "0 seconds after epoc..." is probably bad... // return "Invalid Date". if (date('U', strtotime($bad_date)) === '0') { return 'Invalid Date'; } // It's probably a valid-ish date format already return date($format, strtotime($bad_date)); } } // ------------------------------------------------------------------------ if (!function_exists('timezone_menu')) { /** * Timezone Menu * * Generates a drop-down menu of timezones. * * @param string timezone * @param string classname * @param string menu name * @param mixed attributes * @return string */ function timezone_menu($default = 'UTC', $class = '', $name = 'timezones', $attributes = '') { $CI =& get_instance(); $CI->lang->load('date'); $default = ($default === 'GMT') ? 'UTC' : $default; $menu = '<select name="' . $name . '"'; if ($class !== '') { $menu .= ' class="' . $class . '"'; } $menu .= _stringify_attributes($attributes) . ">\n"; foreach (timezones() as $key => $val) { $selected = ($default === $key) ? ' selected="selected"' : ''; $menu .= '<option value="' . $key . '"' . $selected . '>' . $CI->lang->line($key) . "</option>\n"; } return $menu . '</select>'; } } // ------------------------------------------------------------------------ if (!function_exists('timezones')) { /** * Timezones * * Returns an array of timezones. This is a helper function * for various other ones in this library * * @param string timezone * @return string */ function timezones($tz = '') { // Note: Don't change the order of these even though // some items appear to be in the wrong order $zones = array( 'UM12' => -12, 'UM11' => -11, 'UM10' => -10, 'UM95' => -9.5, 'UM9' => -9, 'UM8' => -8, 'UM7' => -7, 'UM6' => -6, 'UM5' => -5, 'UM45' => -4.5, 'UM4' => -4, 'UM35' => -3.5, 'UM3' => -3, 'UM2' => -2, 'UM1' => -1, 'UTC' => 0, 'UP1' => +1, 'UP2' => +2, 'UP3' => +3, 'UP35' => +3.5, 'UP4' => +4, 'UP45' => +4.5, 'UP5' => +5, 'UP55' => +5.5, 'UP575' => +5.75, 'UP6' => +6, 'UP65' => +6.5, 'UP7' => +7, 'UP8' => +8, 'UP875' => +8.75, 'UP9' => +9, 'UP95' => +9.5, 'UP10' => +10, 'UP105' => +10.5, 'UP11' => +11, 'UP115' => +11.5, 'UP12' => +12, 'UP1275' => +12.75, 'UP13' => +13, 'UP14' => +14 ); if ($tz === '') { return $zones; } return isset($zones[$tz]) ? $zones[$tz] : 0; } } // ------------------------------------------------------------------------ if (!function_exists('date_range')) { /** * Date range * * Returns a list of dates within a specified period. * * @param int unix_start UNIX timestamp of period start date * @param int unix_end|days UNIX timestamp of period end date * or interval in days. * @param mixed is_unix Specifies whether the second parameter * is a UNIX timestamp or a day interval * - TRUE or 'unix' for a timestamp * - FALSE or 'days' for an interval * @param string date_format Output date format, same as in date() * @return array */ function date_range($unix_start = '', $mixed = '', $is_unix = TRUE, $format = 'Y-m-d') { if ($unix_start == '' OR $mixed == '' OR $format == '') { return FALSE; } $is_unix = !(!$is_unix OR $is_unix === 'days'); // Validate input and try strtotime() on invalid timestamps/intervals, just in case if ((!ctype_digit((string)$unix_start) && ($unix_start = @strtotime($unix_start)) === FALSE) OR (!ctype_digit((string)$mixed) && ($is_unix === FALSE OR ($mixed = @strtotime($mixed)) === FALSE)) OR ($is_unix === TRUE && $mixed < $unix_start)) { return FALSE; } if ($is_unix && ($unix_start == $mixed OR date($format, $unix_start) === date($format, $mixed))) { return array(date($format, $unix_start)); } $range = array(); $from = new DateTime(); $from->setTimestamp($unix_start); if ($is_unix) { $arg = new DateTime(); $arg->setTimestamp($mixed); } else { $arg = (int)$mixed; } $period = new DatePeriod($from, new DateInterval('P1D'), $arg); foreach ($period as $date) { $range[] = $date->format($format); } /* If a period end date was passed to the DatePeriod constructor, it might not * be in our results. Not sure if this is a bug or it's just possible because * the end date might actually be less than 24 hours away from the previously * generated DateTime object, but either way - we have to append it manually. */ if (!is_int($arg) && $range[count($range) - 1] !== $arg->format($format)) { $range[] = $arg->format($format); } return $range; } }