Date pre-1970, strtotime and safestrtotime nor mktime is of any help

Question

hbmarar 0 Junior Poster

15 Years Ago

Hi ,

I have a scenario where I have to fetch the dates in 1/1/1900 format and insert it to a new database as 1900-01-01. The issue i face is my date before 1970 gets reset to 01-01-1970.

I tried as strftime("%Y-%m-%d", strtotime(''1-1-1900)).
I also tried with mktime but same.

There is a safestrtotime() in the strtotime function page in php.net but that gives me for date 01-01-1900 the date as 14-12-1901.

PHP 5.1+
OS : Ubuntu

Thanks in advance for the pointers and suggestions, I remain

With regards,

Harish

php

4 Contributors
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Latest Post 15 Years Ago Latest Post by cwarn23

cwarn23 387 Occupation: Genius

15 Years Ago

I have experimented with your problem and this appears to be a minor php bug. It seems to not handle negetive numbers properly. So to be able to do this job, you will need to make custom functions with loops that calculate the appropriate date. I will see what I can do as it won't be an easy task (due to leap years) but good luck.

cwarn23 387 Occupation: Genius

15 Years Ago

In case you want to make a custom function, the following code will do the job but is really slow. But this will give you something to play with.

<?
function get_date($date,$timestamp=false) {
    if ($timestamp==false) {
        $timestamp=time();
        } else {
        $timestamp=round($timestamp);
        }
    if ($timestamp>=0) {
        return date($date,$timestamp);
        } else {
        if ($timestamp<-100000000)  { die('This timestamp will take too long to calculate'); }
        //calculate negative time
        $year=1970;
        for ($i=-1;$i>$timestamp;) { //year loop
            $year--;
            for ($k=31; $k>0;$k--) { //month loop (December)
                $month=12;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (November)
                $month=11;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (October)
                $month=10;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (September)
                $month=9;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (August)
                $month=8;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (July)
                $month=7;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (June)
                $month=6;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (May)
                $month=5;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (April)
                $month=4;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (March)
                $month=3;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            if (round((1972-$year)/4)==((1972-$year)/4)) {
                $j=29;
                } else {
                $j=28;
                }
            for ($k=$j; $k>0;$k--) { //month loop (February)
                $month=2;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (January)
                $month=1;
                $day=$k;
                for ($l=24; $l>0;$l--) {
                    $hour=$l;
                    for ($m=59; $m>-1;$m--) {
                        $minute=$m;
                        for ($n=59; $n>-1;$n--, $i--) {
                            $second=$n;
                            if ($i==$timestamp) { break;break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break;break; }
                        }
                    if ($i==$timestamp) { break;break;break; }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
 
            }
        }
        if ($hour>12) {
            $ampm='AM';
            $pmam='am';
            } else {
            $ampm='PM';
            $pmam='pm';
            }
        if ($hour>12) {
            $hr=$hour-12;
            } else {
            $hr=$hour;
            }
        if ($second<10) {
            $second='0'.$second;
            }
        if ($minute<10) {
            $minute='0'.$minute;
            }
        return str_replace(array('Y','n','j','H','h','i','s','a','A'),array($year,$month,$day,$hour,$hr,$minute,$second,$pmam,$ampm),$date);
    }
echo get_date('Y-n-j.....h:i:s A',-10000000);
?>

hbmarar commented: Thanks to cwarn for helping me +5

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Wonen 0 Newbie Poster · Answer 1 · 2009-09-04T17:21:41+00:00

Hm, thanks for this. I had the same issue.

almostbob 866 Retired: passive income ROCKS · Answer 2 · 2009-09-04T18:04:43+00:00

There is an add in library for this function,
not sure how good it is,
http://phplens.com/phpeverywhere/node/view/16

hbmarar 0 Junior Poster · Answer 3 · 2009-09-04T18:31:57+00:00

Function I tried other than builtin strtotime and date+ mktime is as below section but nothing gave me the exact date. Since I was getting no where, just wondered how about type cast. It seems WORKING, in the sense, I am able to put in the date as needed and precise 1900-01-01.

Input date: 1/1/1900
Output desired as inserted in database : 1900-01-01

Step #1. Exploded the input date to a array.
Step #2. Formed a needed format variable($timestamp) from the array
Step #3. Just to make sure cast as 'String' : ( String ) $timestamp

Inserted to the datebase , and the date type field holds the date correctly and the way expected.
[Note] Dont know whether above approach is correct but by posting here I believe, I could get some suggestions.

========================================================

-------------------------Function1------------------------------

function Hsafestrtotime ($s) {
	  $basetime = 0;
	  if (preg_match ("/19(\d\d)/", $s, $m) && ($m[1] < 70)) {
	    $s = preg_replace ("/19\d\d/", 1900 + $m[1]+68, $s);
	    $basetime = 0x80000000 + 1570448;
	  }
	  return $basetime + strtotime ($s);
	}

--------------------------Function2--------------------------

function safestrtotime($strInput) {
        $iVal = -1;
        for ($i=1900; $i<=1969; $i++) {
            # Check for this year string in date
            $strYear = (string)$i;
            if (!(strpos($strInput, $strYear)===false)) {
                $replYear = $strYear;
                $yearSkew = 1970 - $i;
                $strInput = str_replace($strYear, "1970", $strInput);
            };
        };
        $iVal = strtotime($strInput);
        if ($yearSkew > 0) {
            $numSecs = (60 * 60 * 24 * 365 * $yearSkew);
            $iVal = $iVal - $numSecs;
            $numLeapYears = 0;        # Work out number of leap years in period
            for ($j=$replYear; $j<=1969; $j++) {
                $thisYear = $j;
                $isLeapYear = false;
                # Is div by 4?
                if (($thisYear % 4) == 0) {
                    $isLeapYear = true;
                };
                # Is div by 100?
                if (($thisYear % 100) == 0) {
                    $isLeapYear = false;
                };
                # Is div by 1000?
                if (($thisYear % 1000) == 0) {
                    $isLeapYear = true;
                };
                if ($isLeapYear == true) {
                    $numLeapYears++;
                };
            };
            $iVal = $iVal - (60 * 60 * 24 * $numLeapYears);
        };
        return($iVal);
    }

hbmarar 0 Junior Poster · Answer 4 · 2009-09-04T18:38:25+00:00

There is an add in library for this function,
not sure how good it is,
http://phplens.com/phpeverywhere/node/view/16

Thanks almostbob for the refernce link and knowledge. Sure, I would try it out. For now, I managed it some how but would like to try out something that is the right approach. Thanks once again.

cwarn23 387 Occupation: Genius Team Colleague Featured Poster · Answer 5 · 2009-09-05T10:30:35+00:00

Just for anybody reading this thread in the future, I have managed to complete my script with better reliability and is as follows:

function get_date($date,$timestamp=false) {
    if ($timestamp==false) {
        $timestamp=time();
        } else {
        $timestamp=round($timestamp);
        }
    if ($timestamp>=0) {
        return date($date,$timestamp);
        } else {
        if ($timestamp<-62168515200)  { die('This timestamp was during before the year zero there for will not be calculated'); }
        //calculate negative time
        $year=1970;
        for ($i=-1;$i>$timestamp;) { //year loop
            $year--;
            for ($k=31; $k>0;$k--) { //month loop (December)
                $month=12;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (November)
                $month=11;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (October)
                $month=10;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (September)
                $month=9;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (August)
                $month=8;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (July)
                $month=7;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (June)
                $month=6;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (May)
                $month=5;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=30; $k>0;$k--) { //month loop (April)
                $month=4;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (March)
                $month=3;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            if (round((1972-$year)/4)==((1972-$year)/4)) {
                $j=29;
                } else {
                $j=28;
                }
            for ($k=$j; $k>0;$k--) { //month loop (February)
                $month=2;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
            for ($k=31; $k>0;$k--) { //month loop (January)
                $month=1;
                $day=$k;
                if (($i-86400)>$timestamp) {
                    $i-=86400;
                    $l=24; $hour=24;
                    $m=59; $minute=59;
                    $n=59; $second=59;
                    } else {
                    for ($l=24; $l>0;$l--) {
                        $hour=$l;
                        for ($m=59; $m>-1;$m--) {
                            $minute=$m;
                            for ($n=59; $n>-1;$n--, $i--) {
                                $second=$n;
                                if ($i==$timestamp) { break;break;break;break;break; }
                                }
                            if ($i==$timestamp) { break;break;break;break; }
                            }
                        if ($i==$timestamp) { break;break;break; }
                        }
                    }
                if ($i==$timestamp) { break;break; }
                }
            if ($i==$timestamp) { break; }
 
            }
        }
        if ($hour>12) {
            $ampm='PM';
            $pmam='pm';
            } else {
            $ampm='AM';
            $pmam='am';
            }
        if ($hour>12) {
            $hr=$hour-12;
            } else {
            $hr=$hour;
            }
        if ($second<10) {
            $second='0'.$second;
            }
        if ($minute<10) {
            $minute='0'.$minute;
            }
        return str_replace(array('Y','n','j','H','h','i','s','a','A'),array($year,$month,$day,$hour,$hr,$minute,$second,$pmam,$ampm),$date);
    }


//now to use it.
echo get_date('Y-n-j.....h:i:s A',-172800);
?>