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Re: PHP Help

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morashsPeasant is not online. morashsPeasant
Joined: 06 Jan 2011
Total Posts: 4944
26 Sep 2015 09:46 AM
All right how do I check if something exists/doesnt exist in an array?
Here is what I have so far but it keeps erroring:

if(!$thing['ClassValue']){
$thing['ClassValue'] = 0;
};

Error:
Notice: Undefined index: ClassValue


morashsPeasant is sleeping
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BothAngles is not online. BothAngles
Joined: 01 Dec 2011
Total Posts: 9604
26 Sep 2015 10:00 AM
in_array
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morashsPeasant is not online. morashsPeasant
Joined: 06 Jan 2011
Total Posts: 4944
26 Sep 2015 10:00 AM
Oh thanks :)

morashsPeasant is skrubbing
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TickerOfTime is not online. TickerOfTime
Joined: 02 Sep 2012
Total Posts: 2030
26 Sep 2015 10:02 AM
Generally use double quotes for indexes in php, it does make a difference.
Here's what I do:
if (empty($Arr["Index"])) {
echo "Index is empty";
}
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morashsPeasant is not online. morashsPeasant
Joined: 06 Jan 2011
Total Posts: 4944
26 Sep 2015 10:10 AM
That is for the case that $Arr["Index"] = null; right?

morashsPeasant is skrubbing
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notfruit is not online. notfruit
Joined: 21 Sep 2012
Total Posts: 1386
26 Sep 2015 11:10 AM
the real problem is that you're using PHP
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BothAngles is not online. BothAngles
Joined: 01 Dec 2011
Total Posts: 9604
26 Sep 2015 11:23 AM
PHP IS GOOD
Improved performance: PHP 7 is up to twice as fast as PHP 5.6
Consistent 64-bit support
Many fatal errors are now Exceptions
Removal of old and unsupported SAPIs and extensions
The null coalescing operator (??)
Combined comparison Operator (<=>)
Return Type Declarations
Scalar Type Declarations
Anonymous Classes
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cpmoderator12345 is not online. cpmoderator12345
Joined: 26 Jan 2013
Total Posts: 15651
26 Sep 2015 11:46 AM
php operators are weird
like this operator: ->
and php leads to bad programming practices

https://www.youtube.com/watch?v=-AvRvI9Klu0&t=159s
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gskw is not online. gskw
Joined: 05 Jan 2013
Total Posts: 1364
26 Sep 2015 11:50 AM
@BothAngles

http://eev.ee/blog/2012/04/09/php-a-fractal-of-bad-design/

Most of the problems listed in the link still apply.
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cpmoderator12345 is not online. cpmoderator12345
Joined: 26 Jan 2013
Total Posts: 15651
26 Sep 2015 11:52 AM
>mysql_real_escape_string
>>real
i always knew that php was weird but
i cant even asp.net

https://www.youtube.com/watch?v=-AvRvI9Klu0&t=159s
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Aethex is not online. Aethex
Joined: 16 Oct 2011
Total Posts: 2193
26 Sep 2015 11:53 AM
php isn't "bad"

php is bad if the programmer is bad

If anyone actually fully utilizes the class system and all of the features in a way that they should be used, then PHP is actually a fairly decent language. Most beginner programmers like it because of simplicity, though, so it got a bad reputation because of the people that use it.

so: php is good if the programmer is good

don't just say it's a bad language if you use it wrong
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gskw is not online. gskw
Joined: 05 Jan 2013
Total Posts: 1364
26 Sep 2015 11:56 AM
Did you even take a look at the post I linked?

"Do not tell me that “good developers can write good code in any language”, or bad developers blah blah. That doesn’t mean anything. A good carpenter can drive in a nail with either a rock or a hammer, but how many carpenters do you see bashing stuff with rocks? Part of what makes a good developer is the ability to choose the tools that work best."
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cpmoderator12345 is not online. cpmoderator12345
Joined: 26 Jan 2013
Total Posts: 15651
26 Sep 2015 11:56 AM
i dont use php wrong; i use it for all my websites
php is good but its peculiar
kind of like visual basic

https://www.youtube.com/watch?v=-AvRvI9Klu0&t=159s
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BothAngles is not online. BothAngles
Joined: 01 Dec 2011
Total Posts: 9604
26 Sep 2015 11:57 AM
I do agree with that post gskw, but PHP is very easy and fun to use :)
The best part is it doesn't require a 1GB download/messing with makefiles/don't need a compiler/etc
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Aethex is not online. Aethex
Joined: 16 Oct 2011
Total Posts: 2193
26 Sep 2015 11:58 AM
@gskw I actually did look at that link. PHP is a good choice at times and bad at others. That doesn't make a bad language, though.
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gskw is not online. gskw
Joined: 05 Jan 2013
Total Posts: 1364
26 Sep 2015 12:34 PM
Even the simplest PHP code is broken:

echo "Hello, {$_POST['name']}";

So...
- echo is not a function, nor is its friend print.
- echo returns void unlike print, which always returns 1.
- echo can be used with parenthesis, which enables it to accept multiple arguments.
- Which is not true if you're only passing it variables and not string literals.
- print can be used with parenthesis as well, but it never accepts multiple arguments.
- There is a warning about print being weird as the top comment on its documentation page.
- {$_POST['name']} concatenates the "name" value from the $_POST superglobal to the string. If the value doesn't exist, an E_NOTICE will be triggered (those are off by default) and then what? What will go inside the string? I don't exactly know.
- Whatever goes there, you would probably waste tons of time debugging your JavaScript code trying to find out what sets a value in your form to that.
- And if you were to use single quotes for the string, it would not be possible to insert the value like that. You would have to use the dot operator.

Pretty horrible of a language huh?
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notfruit is not online. notfruit
Joined: 21 Sep 2012
Total Posts: 1386
26 Sep 2015 12:38 PM
> Most fatal errors are now exceptions

And it took 7 versions to fix that?
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BothAngles is not online. BothAngles
Joined: 01 Dec 2011
Total Posts: 9604
26 Sep 2015 12:48 PM
@gskw
"How are echo and print different in PHP?"
Speed. There is a difference between the two, but speed-wise it should be irrelevant which one you use. echo is marginally faster since it doesn't set a return value if you really want to get down to the nitty gritty.

Expression. print() behaves like a function in that you can do: $ret = print "Hello World"; And $ret will be 1. That means that print can be used as part of a more complex expression where echo cannot. An example from the PHP Manual:

$b ? print "true" : print "false";

print is also part of the precedence table which it needs to be if it is to be used within a complex expression. It is just about at the bottom of the precedence list though. Only "," AND, OR and XOR are lower.

Parameter(s). The grammar is: echo expression [, expression[,
expression] ... ] But echo ( expression, expression ) is not valid. This would be valid: echo ("howdy"),("partner"); the same as: echo
"howdy","partner"; (Putting the brackets in that simple example serves no purpose since there is no operator precedence issue with a single term like that.)

So, echo without parentheses can take multiple parameters, which get concatenated:

echo "and a ", 1, 2, 3; // comma-separated without parentheses
echo ("and a 123"); // just one parameter with parentheses

print() can only take one parameter:

print ("and a 123");
print "and a 123";



@not
It wasn't broken. Fatal errors are kind of like errors that causes C++ to not compile (undefined variables)
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BothAngles is not online. BothAngles
Joined: 01 Dec 2011
Total Posts: 9604
26 Sep 2015 12:49 PM
cause*
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notfruit is not online. notfruit
Joined: 21 Sep 2012
Total Posts: 1386
26 Sep 2015 01:10 PM
I know what fatal errors are. What I'm saying is that it probably shouldn't have taken version 7 for those errors to be handled by exceptions.
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