Date Comparison Function for `usort()` (PHP)
0
I am working through a PHP book, and date comparison was mentioned as one of the uses of usort(), so I wrote a date comparison function to use in line with usort. Writing the function wasn't as easy as I expected (there was a pesky bug which took me a while to identify), so I thought I would submit my comparison code for review.
dates.php
<?
function dateParse($date)
{
return (count(explode("-", $date)) == 3)?(explode("-", $date)):(explode("/", $date)); #Returns the date as an array.
}
function dateSort($date1, $date2, $format=1)
{
if ($format == 0) #dd/mm/yyyy format.
{
list($day1, $month1, $year1) = dateParse($date1);
list($day2, $month2, $year2) = dateParse($date2);
}
elseif ($format == 1) #mm/dd/yyyy format.
{
list($month1, $day1, $year1) = dateParse($date1);
list($month2, $day2, $year2) = dateParse($date2);
}
elseif ($format == 2) #yyyy/mm/dd format.
{
list($year1, $month1, $day1) = dateParse($date1);
list($year2, $month2, $day2) = dateParse($date2);
}
$day1 = str_pad($day1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$day2 = str_pad($day2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$month1 = str_pad($month1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$month2 = str_pad($month2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$x1 = $year1.$month1.$day1;
$x2 = $year2.$month2.$day2;
return ((int)$x1 <=> (int)$x2);
}
?>
beginner php
asked 23 mins ago
Tobi Alafin
1835
add a comment |
0
I am working through a PHP book, and date comparison was mentioned as one of the uses of usort(), so I wrote a date comparison function to use in line with usort. Writing the function wasn't as easy as I expected (there was a pesky bug which took me a while to identify), so I thought I would submit my comparison code for review.
dates.php
<?
function dateParse($date)
{
return (count(explode("-", $date)) == 3)?(explode("-", $date)):(explode("/", $date)); #Returns the date as an array.
}
function dateSort($date1, $date2, $format=1)
{
if ($format == 0) #dd/mm/yyyy format.
{
list($day1, $month1, $year1) = dateParse($date1);
list($day2, $month2, $year2) = dateParse($date2);
}
elseif ($format == 1) #mm/dd/yyyy format.
{
list($month1, $day1, $year1) = dateParse($date1);
list($month2, $day2, $year2) = dateParse($date2);
}
elseif ($format == 2) #yyyy/mm/dd format.
{
list($year1, $month1, $day1) = dateParse($date1);
list($year2, $month2, $day2) = dateParse($date2);
}
$day1 = str_pad($day1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$day2 = str_pad($day2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$month1 = str_pad($month1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$month2 = str_pad($month2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$x1 = $year1.$month1.$day1;
$x2 = $year2.$month2.$day2;
return ((int)$x1 <=> (int)$x2);
}
?>
beginner php
asked 23 mins ago
Tobi Alafin
1835
add a comment |
0
0
0
I am working through a PHP book, and date comparison was mentioned as one of the uses of usort(), so I wrote a date comparison function to use in line with usort. Writing the function wasn't as easy as I expected (there was a pesky bug which took me a while to identify), so I thought I would submit my comparison code for review.
dates.php
<?
function dateParse($date)
{
return (count(explode("-", $date)) == 3)?(explode("-", $date)):(explode("/", $date)); #Returns the date as an array.
}
function dateSort($date1, $date2, $format=1)
{
if ($format == 0) #dd/mm/yyyy format.
{
list($day1, $month1, $year1) = dateParse($date1);
list($day2, $month2, $year2) = dateParse($date2);
}
elseif ($format == 1) #mm/dd/yyyy format.
{
list($month1, $day1, $year1) = dateParse($date1);
list($month2, $day2, $year2) = dateParse($date2);
}
elseif ($format == 2) #yyyy/mm/dd format.
{
list($year1, $month1, $day1) = dateParse($date1);
list($year2, $month2, $day2) = dateParse($date2);
}
$day1 = str_pad($day1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$day2 = str_pad($day2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$month1 = str_pad($month1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$month2 = str_pad($month2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$x1 = $year1.$month1.$day1;
$x2 = $year2.$month2.$day2;
return ((int)$x1 <=> (int)$x2);
}
?>
beginner php
asked 23 mins ago
Tobi Alafin
1835
I am working through a PHP book, and date comparison was mentioned as one of the uses of usort(), so I wrote a date comparison function to use in line with usort. Writing the function wasn't as easy as I expected (there was a pesky bug which took me a while to identify), so I thought I would submit my comparison code for review.
dates.php
<?
function dateParse($date)
{
return (count(explode("-", $date)) == 3)?(explode("-", $date)):(explode("/", $date)); #Returns the date as an array.
}
function dateSort($date1, $date2, $format=1)
{
if ($format == 0) #dd/mm/yyyy format.
{
list($day1, $month1, $year1) = dateParse($date1);
list($day2, $month2, $year2) = dateParse($date2);
}
elseif ($format == 1) #mm/dd/yyyy format.
{
list($month1, $day1, $year1) = dateParse($date1);
list($month2, $day2, $year2) = dateParse($date2);
}
elseif ($format == 2) #yyyy/mm/dd format.
{
list($year1, $month1, $day1) = dateParse($date1);
list($year2, $month2, $day2) = dateParse($date2);
}
$day1 = str_pad($day1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$day2 = str_pad($day2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the day is a single digit.
$month1 = str_pad($month1, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$month2 = str_pad($month2, 2, "0", STR_PAD_LEFT); #Adds a leading "0" if the month is a single digit.
$x1 = $year1.$month1.$day1;
$x2 = $year2.$month2.$day2;
return ((int)$x1 <=> (int)$x2);
}
?>
beginner php
beginner php
asked 23 mins ago
Tobi Alafin
1835
asked 23 mins ago
Tobi Alafin
1835
asked 23 mins ago
Tobi Alafin
1835
asked 23 mins ago
Tobi Alafin
1835
asked 23 mins ago
Tobi Alafin
1835
1835
add a comment |
add a comment |
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