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tonelm54

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preg_split

Im trying to get the individual date elements out of a string (it is a string, but is out of mysql, but I cannot access the MySQL date bit anymore, so can only use it as a string).

What I thought Id do is split the string using - as the split point and then pull in the array elements:-
$strDate = "2013-05-20";
echo "Year - " . preg_split('/-/', $_GET['orgValue'])[0] . "\n";
echo "Month - " . preg_split('/-/', $_GET['orgValue'])[1] . "\n";
echo "Day - " . preg_split('/-/', $_GET['orgValue'])[2] . "\n";

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However all I get is:-
Parse error: syntax error, unexpected '[', expecting ',' or ';'

Any ideas what Im doing wrong?
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kaufmed
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@gr8gonzo
Don't use preg_split unless your delimiter is a regular expression.
Technically speaking, any single character can be considered a regular expression  ; )
(Separating my post into two pieces, since I figure that someone else is going to swoop in with a quick answer while I try to type up additional suggestions)

3. Familiarize yourself with strtotime(), which will turn a string like "2013-05-13" into a UNIX timestamp, which you can then pass to date() to get any date/time portion you want:

$timestamp = strtotime($strDate);
echo "$strDate is a " . date("l",$timestamp) . ", falls in the month of " . date("F",$timestamp) . ", in week #".date("W",$timestamp)." of the year " . date("Y",$timestamp);

http://php.net/manual/en/function.date.php

This should make your date manipulation/coding much easier/more flexible.

4. To be clear on why explode() is better than preg_split() - whenever you use a preg_ function, PHP loads up a big, separate library to help it process those regular expressions. It takes up memory and a little bit of loading time. It's like renting a huge moving truck so that you can move a pillow.

When you are creating small pieces of code that will only be accessed by a couple of people, it doesn't seem like much of a difference, but when you start coding large applications, the negative effect can multiply.

5. For the sake of proper terminology, use the term "delimiter", not "split point" - you'll find that "delimiter" is used everywhere else in the coding world, so it'll make your life that much easier. :)
> Technically speaking, any single character can be considered a regular expression  ; )

Technically, yes. That's what I was getting to with my "moving truck" analogy just now. :)
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