Arrays Question clearification and filter...

[Rockonmetal]

Ok, Arrays have been a bit difficult for me to understand how they work and what they can do for me...



$sentence = array("Part","of","an","array");

Thats an example of an array...
I am trying to create a filter for my site's comment board...
*Does anyone know a link to like all the bad words in the universe lol... cuz i don't use a variety of language...*
But, instead of doing this:


if($comment==badwordthatidon'tfeellikegettingbannedfor){
echo "****";
}
Then looping that... which would not be fun...

I saw this in W3 schools... but it has got arrays in it *which confuse me...*
if someone could explain how this calls the individual parts...

<?php
$arr = array("Hello" => "Hi", "world" => "earth");
echo strtr("Hello world",$arr);
?>

I think I've got a thought on this...
So if
$arr = array("Hello" => "Hi", "world" => "earth");
Basically the => says turn this to that... then that to that...
Am I correct? Thanks...
Thanks

[djr33]

Ok, here's how arrays work.

$a = array($key1=>$value1,$key2=>$value2);
echo $a[$key1]; //'$value1'
echo $a[$key2]; //'$value2'
$b = array($value1,$value2);
echo $a[0]; //starts at 0, '$value1'
echo $a[1]; //'$value2'

foreach($b as $val) {
echo $val;
}
//'$value1.$value2'

foreach($b as $key=>$val) {
echo $key.$val;
}
//'$key1.$value1.$key2.$value2'

$a['test'] = 'abc';

echo $a['test']; //'abc'
//note that the older values of $a are still stored

The easiest way to replace each element is with a foreach loop. However, you could actually just use str_replace(), as it allows array arguments (see the documentation for details).

[boogyman]

foreach($b as $val) {
echo $val;
}
//'$value1.$value2'

foreach($b as $key=>$val) {
echo $key.$val;
}
//'$key1.$value1.$key2.$value2'

I am pretty sure there wouldnt be a dot unless you declare one. it would look something more like


ex1) $val1$val2$val3$val4
ex2) $key1.$value1$key2.$value2$key3.$value3$key4.$value4

but I am also sure that you would probably be using some other type of html styling before you actually render the page, which of course would have its own default markup style

[Rockonmetal]

Ok... thats a little to complicated... lol... uh... but was my concept at the top correct??? If i am going to do this, which i tried but it didn't work for me...

<?php
$words = array("Peter","Quagmire","Joe");
$Description = "Peter ate Quagmire and Joe then ate Peter for eating Quagmire...";
echo str_replace("$words","EXPLICT","$Description");
?>

How can i get it so that it works?
It doesn't seem to filter the words...
When i do the echo for $words, it just returns as Array...
Which doesn't make any sense...
Any reason?

[thetestingsite]

Get rid of the quotes around the variables:



echo str_replace("$words","EXPLICT","$Description");


When you have quotes around the variables it means you are trying to search for the word '$words' in the string '$Description'; in this case returning false.

Hope this helps.

[Rockonmetal]

oh! so take the quotes out... ok i will thanks!
It works lol...
its really odd now but anyways...

<?php
$words = array("Peter","Quagmire","Joe");
$Description = "Peter ate Quagmire and Joe then ate Peter for eating Quagmire...";
echo str_replace($words,"EXPLICT",$Description);
echo $words;

?>

K thanks!

[Rockonmetal]

<?php
$words = array("Peter","Quagmire","Joe");
$Description = "Peter ate Quagmire and Joe then ate Peter for eating Quagmire...";
echo str_replace($words,"EXPLICT",$Description);
echo $words;

?>

K now a quick question...
I know that the str_replace is case sensitive and some idiot is gonna do this
baDwoRd and it will won't filter... is there anyway I can get it so that only stuff like this:

/*
SEnTaNcE WorD Dude BaD woRD *User inputted stuff*
Turns into this
Sentance word dude bad word... *Draft*
Sentance word dude EXPLETIVE... *Final*
*/
Either that or is there a function/command/tag/something like str_replace that isn't case sensitive?

Thanks

[thetestingsite]

Try this, change $_POST['comment'] to $_GET['comment'] for testing like so:

script.php?comment=Your StRiNG Goes HerE With SOmE BAd WorDS



<?php
$badwords = array('some','bad','words','here');

//change the input string to all lowercase letters
$userstr = strtolower (http://php.net/strtolower)($_POST['comment']);

$output = str_replace($badwords, 'EXPLICT', $userstr);

/* Display the output */
echo ucfirst (http://www.php.net/ucfirst)($output);
?>


Hope this helps.

[Rockonmetal]

Last question I swear

I want to check the length of the comment to make sure its long enough...
I currently have this code

if($length<=100 and $length<=3){
echo "<textarea>";
echo str_replace($words," * ",$lower);
echo "</textarea>";
}else{
echo "You have entered in " . $length . " letters";
}
I don't think this is a valid line
if($length<=100 and $length<=3)
I do this because if $length meets both conditions then it will perform the if statement...
I learned this type of stuff in math class *the concept of inequalities not the code...*
That something like this
x<4 and x>1 means that all the numbers between 1 and 4 will work for both inequalities...
Any help?
Thanks

[thetestingsite]

To do this, you would want to do something like the following:



if (count_chars (http://php.net/countchars)($lower) >= 3 && count_chars (http://php.net/countchars)($lower) <= 100) { //if the characters are more than or equal to 3 but less than or equal to 100

echo "<textarea>";
echo str_replace($words," * ",$lower);
echo "</textarea>";
}else{
echo "You have entered in " . count_chars (http://php.net/countchars)($lower) . " letters";
}


Hope this helps.

[djr33]

I am pretty sure there wouldnt be a dot unless you declare one.Oh, I was vague. I meant . in the sense of php "link" or whatever that operation is called, where $v1.$v2 is "[value1][value2]", ie, run together, no dot output.