PHP

debug_backtrace

April 27, 2012 Pramod T P

It generate a generates a backtrace and displays data from the code that led up to the debug_backtrace() function.

Example

<?php
echo “<pre>”;
function back($arg1, $arg2) {
print_r(debug_backtrace());
}
back(“test1”, “test2”);
?>

The possible elements that can be returned are given below

function,line,file,class,object,type,Returns: “->” ,Returns: “::” ,Returns nothing,args

Output

Array
(
[0] => Array
(
[file] => /var/www/test/index.php
[line] => 6
[function] => back
[args] => Array
(
[0] => Peter
[1] => Griffin
)

)

)

General

Julian day

April 27, 2012 Pramod T P

Julian day is used in the Julian date (JD) system of time measurement for scientific use by the astronomy community, presenting the interval of time in days and fractions of a day since January 1, 4713 BC Greenwich noon. Julian date is recommended for astronomical use by the International Astronomical Union.

The Julian Day Number (JDN) is the Julian day with the fractional part ignored. It is sometimes used in calendrical calculation, in which case, JDN 0 is used for the date equivalent to Monday January 1, 4713 BC in the Julian calendar.
The term Julian date is widely used to refer to the day-of-year (ordinal date) although incorrectly.

PHP

unixtojd

April 27, 2012 Pramod T P

It convert Unix timestamp to Julian Day

Example

<?php
echo unixtojd();
?>

Output
2456045

PHP

JulianToJD

April 27, 2012 Pramod T P

It converts a Julian Calendar date to Julian Day Count

Example

<?php
$jdate = juliantojd(8,4,1976);
echo $jdate . “<br />”;
$julian = jdtojulian($jdate);
echo $julian;
?>

Output

2443008
8/4/1976

PHP

jewishtojd

April 27, 2012 Pramod T P

It converts a date in the Jewish Calendar to Julian Day Count

Example

<?php
echo jewishtojd(3,3,5762);
?>

Output

2452232

PHP

jdtounix

April 27, 2012 Pramod T P

It convert Julian Day to Unix timestamp

Example

<?php
$jdate = gregoriantojd(10,3,1970);
echo jdtounix($jdate);
?>
Output

23760000

PHP

JDToJulian

April 27, 2012 Pramod T P

It converts a Julian Day Count to a Julian Calendar Date

Example

<?php
$date = juliantojd(9,2,1977);
echo $date . “<br />”;
$julian = jdtojulian($date);
echo $julian;
?>

Output

2443402
9/2/1977

PHP

jdtojewish

April 27, 2012 Pramod T P

It converts a Julian day count to a Jewish calendar date

Example

<?php
echo jdtojewish(gregoriantojd(9,7,2000)) . “<br />”;
echo jdtojewish(gregoriantojd(9,7,2000),true);
?>

Output

13/7/5760
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PHP

JDToGregorian

April 27, 2012 Pramod T P

It converts Julian Day Count to Gregorian date

Example

<?php
$date = gregoriantojd(9,4,1976);
echo $date . “<br />”;
$gregorian = jdtogregorian($date);
echo $gregorian;
?>

Output

2443026
9/4/1976

PHP

jdtofrench

April 27, 2012 Pramod T P

It converts a Julian Day Count to the French Republican Calendar

Example

<?php
echo jdtofrench(2380644);
?>

Output

2/27/14

Beginners' Guide