PHP. It’s been a little while since I had to deal with you but, seriously, is this really a thing?
[php]$value = 10;
$temp = 0;
for($ctr = 0; $ctr < $value; $ctr++) {
echo "value + ctr: " . $value + $ctr . "<br>";
// this doesn’t work?!
$temp = $value + $ctr;
echo "value + ctr: " . $temp . "<br>";
// … but this does work?
}[/php]
Perhaps (hopefully) things have changed in PHP7?
this week (wk 7)
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/lib/ld-linux.so.2 missing? libXext.so.6 can’t be found?
I recently [at the original time of writing] installed Fedora 11 [x86_64] on a test machine, to see how the development desktop build of my favourite Linux distribution is doing – and it’s very nice indeed.
I tried to install Zend Studio 5.5 and soon came across problems, which I found out related to not having 32-bit versions of Xorg and glibc installed. To remedy this, ensure you follow these steps:
su -c 'yum groupinstall Java'
su -c 'yum install glibc.i686 libXext.i586'
Once installed, I was able to fire up the Zend Development Environment:
/usr/local/Zend/ZendStudio-5.5.1/bin/ZDE
.. and it was running on the native (OpenJDK) 64-bit JAVA runtime! How’s that for progress!
eCommerce systemLife
Misc
I remember once watching a documentary on Arnold Schwarzenegger’s bodybuilding career (or was it this one?) in the ’70s and early ’80s.
All of the bodybuilders in that golden era had their own training programme managers and promoters. I recall that one manager/promoter, working for another bodybuilder, loved his own quotes.
These quotes would range from the urbane, “the pen is mightier than the muscle”, to somewhat more characteristically humorous: “remember the golden rule: he who has the gold, makes the rules“.
Well, in the completely unrelated world of PHP programming, this perl of wisdom (sic joke) is worth hanging on to. Why? Well, if you have ever used PHP’s variable variables, knowledge of the correct syntax is worth its weight in gold. It’ll save hours, if not days, of debugging.
So, anyway, I’ve been coding a calendar system for a valued client for the past ten days or so. My first attempt I pretty much scrapped as it got too complex and almost impossible to debug. The second version is much better, except for one issue which has been giving me grief until now.
Variable variables in PHP are extremely useful, but I throw in a word of caution immediately: use them sparingly. It can be easy to quickly lose track of what’s called what and why it’s there. Especially if any single script is 400+ lines long.
To set a variable variable, it’s easier to start off giving a value to an ordinary variable:
$myVar = "myVarVar";Now, I want to create a variable variable with the name $myVarVar, so this is how it’s done:
$$myVar = "this is my variable variable";To see the contents of the variable variable, you can do either of the following:
echo $$myVar; // or
echo $myVarVar; Both will output “this is my variable variable” to the screen/page.
Snooker Loopy
Things start getting interesting when you introduce arrays and loops. Take the following example:
for($i=0; $i<4; $i++) {
$myVar = "myVarVar".$i;
$$myVar = " Variable variable £".$i;
}
echo $myVarVar0; // "Variable variable #0"
echo $myVarVar1; // "Variable variable #1"
echo $myVarVar2; // "Variable variable #2"
echo $myVarVar3; // "Variable variable #3"
Life
– reacquaint myself with yellow sash routinesMisc
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shopping cart system Life
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In every day life, I come across a number of things that I find extremely useful. Instead of clogging up my browser’s bookmarks, I’ll list there here for my reference.
I hope they might be of use to you too!
Programming
