The PHP Challenge

[makeshift_theory]

Oh I see, it needs to remove space from the beggining and end of the string.  Hold on I will revise.

[makeshift_theory]

[code]
<?php
function my_trim($str,$charlist)
{
$pattern[0] = "/^\s+/";
$pattern[1] = "/\s+\$/";
$str = preg_replace($pattern,"",$str);
                if(!empty($charlist) || $charlist != '')
              {
                  if(is_array($charlist))
                  {
                    foreach($charlist as $char)
                      $str = ereg_replace($char,"",$str);
                  }
                  else
                    $str = ereg_replace($char,"",$str);
}
                  return $str;
}
$trim = "    LOT OF SPACES HERE    ";
echo my_trim($trim,'');
?>
[/code]

I used patterns this time.

[Orio]

I forgot to mention all you need to remove the spaces (including white-spaces, newlines, tabs etc as said in  the manual) from the [b]beginning and end[/b] of the string. The function doesn't need to include the optional charlist parameter (although if you want to add it, you are welcome :)).

Orio.

[makeshift_theory]

Well the function I wrote removes space from beggining and end and if it finds a character array or string it will replace that too.  Is this correct?

[Orio]

Yes, this version is good. What's your challenge?

Orio.

[makeshift_theory]

Hmmmmm okay, write a function that does the same thing as "similiar_text()."  Basically the function would compare two strings and return a percentage based on the similarity between them.

[fert]

This code returns the number of characters that are the same in both strings
[code]
function check_text($string1,$string2)
{
$count=0;
$same=0;
while($string1{$count}!="" && $string2{$count}!="")
{
if(strcmp($string{$count},$string2{$count}))
{
$same++;
}
$count++;
}
return $same;
}
[/code]

[makeshift_theory]

cool now take the numbers and build a percentage  ;D

[The Little Guy]

fert, that code didn't even work for me, in the strings, i did this:

"abc","123"

It returned 3, it should return 0, none of those were the same.

[neylitalo]

fert: I've never seen this, can you explain it?

[code]$string1{$count}[/code]

[Daniel0]

[quote author=neylitalo link=topic=119299.msg519609#msg519609 date=1170400107]
fert: I've never seen this, can you explain it?

[code]$string1{$count}[/code]
[/quote]

It takes the [tt]$count[/tt]th character in string.

Example: [code]<?php
$string = "abcdef";

echo $string{0};  // echoes the 0th character in $string (a)
echo $string{2};  // echoes the 2nd character in $string (c)
echo $string{2+1}; // echoes the 3rd character in $string (d)

echo "\n";

for($i=strlen($string)-1; $i >= 0; $i--)
{
echo $string{$i}; // using a variable instead of an integer
}
?>[/code]
The above example outputs: [code]acd
fedcba[/code]

[redbullmarky]

neal, {} is a deprecated version of [] which is the more common way of accessing strings - ie, by treating a string like an array.
so $string{$char} is the same as $string[$char]

[neylitalo]

ok, that would explain it - I've never had to really pull characters out of a string, so I've never had call to use that particular notation. It's definitely good to know, though.

[makeshift_theory]

You can do it with arrays too $array[$strinarray]{2}, I just used it for a project I was working on for work.  It's very cool =).