Hijri_Date.md

Convert gregorian date to Hijri

####How to use By default, we create the Hijri object with the current time

$hijri = new HijriDate();

We can set a specific time in the constructor

//passing time
$hijri = new HijriDate( 580060800 );

//or just
$hijri = new HijriDate( strtotime('1998-05-20') );

Then we can retrieve the date with

$hijri->get_date(); //3 Syawal 1408H

Should we want the specific information, we can retrieve it using

$hijri->get_day(); //3
$hijri->get_month(); //10
$hijri->get_year(); //1408

$hijri->get_month_name( 10 ); //syawal
//or from the date given
$hijri->get_month_name( $hijri->get_month() ); //syawal

####License

Released under the MIT license

####Credits to

This code was the improved version created by me, and originally written by amichauer at gmx dot de ¶ guy at PHP.NET

Hijri_Date.php

<?php
/**
* Get hijri date from gregorian
*
* @author   Faiz Shukri
* @date     5 Dec 2013
* @url      https://gist.github.com/faizshukri/7802735
*
* Copyright 2013 | Faiz Shukri
* Released under the MIT license
*/
class HijriDate{

    private $hijri;

    public function __construct( $time = false ){
        if(!$time) $time = time();
        $this->hijri = $this->GregorianToHijri($time);
    }

    public function get_date(){
        return $this->hijri[1] . ' ' . $this->get_month_name($this->hijri[0]) . ' ' . $this->hijri[2] . 'H';
    }

    public function get_day(){
        return $this->hijri[1];
    }

    public function get_month(){
        return $this->hijri[0];
    }

    public function get_year(){
        return $this->hijri[2];
    }
    
    public function get_month_name($i){
        static $month  = array(
            "muharram", "safar", "rabiulawal", "rabiulakhir",
            "jamadilawal", "jamadilakhir", "rejab", "syaaban",
            "ramadhan", "syawal", "zulkaedah", "zulhijjah"
        );
        return $month[$i-1];
    }

    private function GregorianToHijri($time = null){
        if ($time === null) $time = time();
        $m = date('m', $time);
        $d = date('d', $time);
        $y = date('Y', $time);

        return $this->JDToHijri(cal_to_jd(CAL_GREGORIAN, $m, $d, $y));
    }

    private function HijriToGregorian($m, $d, $y){
        return jd_to_cal(CAL_GREGORIAN, $this->HijriToJD($m, $d, $y));
    }

    # Julian Day Count To Hijri
    private function JDToHijri($jd){
        $jd = $jd - 1948440 + 10632;
        $n  = (int)(($jd - 1) / 10631);
        $jd = $jd - 10631 * $n + 354;
        $j  = ((int)((10985 - $jd) / 5316)) *
            ((int)(50 * $jd / 17719)) +
            ((int)($jd / 5670)) *
            ((int)(43 * $jd / 15238));
        $jd = $jd - ((int)((30 - $j) / 15)) *
            ((int)((17719 * $j) / 50)) -
            ((int)($j / 16)) *
            ((int)((15238 * $j) / 43)) + 29;
        $m  = (int)(24 * $jd / 709);
        $d  = $jd - (int)(709 * $m / 24);
        $y  = 30*$n + $j - 30;

        return array($m, $d, $y);
    }

    # Hijri To Julian Day Count
    private function HijriToJD($m, $d, $y){
        return (int)((11 * $y + 3) / 30) +
            354 * $y + 30 * $m -
            (int)(($m - 1) / 2) + $d + 1948440 - 385;
    }
}

Call to undefined function cal_to_jd()

Call to undefined function cal_to_jd()

cal_to_jd is php-calendar function. make sure your php has that module installed.