Using Implode & Explode

[TheJoey]

hello i have a text file which has information seperated by |

so its text1 | text2 | text3 | text4|

 

how do i extract text1 & text2

so i can use it in a login..

[PugJr]

Like this?

 

$text = "text1 | text2 | text3 | text4|";

$array = explode('|', $text);

$piece = $array['0']; /// For 0 = text1, 1 = text2, 2 = text3, 3 = text4, 4 = "", ...

[TheJoey]

so i would make piece

$piece = $array['0']['1'];

[PugJr]

so i would make piece

$piece = $array['0']['1'];

 

 

Um...I'm not gonna test if that works or not, but I'm pretty sure it doesn't.

 

You could do:

$piece = $array['0'];
$piecetwo = $array['1'];


$combinepiece = "$pieceone$piecetwo";

;

 

Unless I'm not understanding you correctly.

[Alex]

You'd want to use trim() as well to remove the white space (that or explode by ' | ' instead of '|'). There's also no point in surrounding the indexes of the array in single quotes because it's an integer.

[PugJr]

You'd want to use trim() as well to remove the white space (that or explode by ' | ' instead of '|'). There's also no point in surrounding the indexes of the array in single quotes because it's an integer.

 

Right, well originally I thought (blank) parsed while '' did not parse. And that still seems to be true, but as I tested speed, some reason parsing processed noticeably faster than non-parsed. Would you care to explain to me how this is?

[Alex]

I'm not sure what you mean by '(blank)', but integers aren't meant to be used without quotes, so I'd guess that's why it's faster. As for what single quotes parse: Single quotes will parse variables as literals, and not their value. While double quotes will parse them.

 

eg

$var = 'Hello';
echo '$var'; // $var
echo "$var"; // Hello

 

Note that in that example normally you wouldn't even use "$var", because variables don't require quotes either. It's just an example.

[PugJr]

I'm not sure what you mean by '(blank)', but integers aren't meant to be used without quotes, so I'd guess that's why it's faster. As for what single quotes parse: Single quotes will parse variables as literals, and not their value. While double quotes will parse them.

 

eg

$var = 'Hello';
echo '$var'; // $var
echo "$var"; // Hello

 

Note that in that example normally you wouldn't even use "$var", because variables don't require quotes either. It's just an example.

 

But its improper not to have quotes. It comes under as an error. Also I thought PHP auto-assumes that if you are lacking quotes you mean single quotes. Perhaps I am mistaken there as well.

 

Also, why are integers faster without single quotes? Whats the reasoning behind this? I would think that not parsing the numbers would be quicker but clearly I am mistaken.

 

[Alex]

It's improper to not have quotes when using strings, although sometimes it won't throw errors (depending on your reporting level).

 

eg (This is improper, but depending on your reporting level won't throw an error)

$arr = Array('first' => 'hello', 'second' => 'world');
echo $arr[first];

 

However not using quotes on integer indexes won't throw an error (It's actually preferred).

 

PHP Processes integers faster than strings, so that's why $arr[0] would be faster than $arr['0'].

[gizmola]

so i would make piece

$piece = $array['0']['1'];

 

No, you get a one dimensional zero based array.  So:

 

$piece1 = $array[0];

$piece2 = $array[1];

[TheJoey]

where should i apply the trim?

[PugJr]

 

PHP Processes integers faster than strings, so that's why $arr[0] would be faster than $arr['0'].

 

Ah, excellent. That explains it. Thanks for the tid bit. Funny how you can have all these little things which will make your PHP script just a little bit faster at a time.

 

 

 

Gizmola, I already corrected that.  (Well, excluding the single quotes and no quotes which I just learned from AlexWD.)

[gizmola]

It's improper to not have quotes when using strings, although sometimes it won't throw errors (depending on your reporting level).

 

eg (This is improper, but depending on your reporting level won't throw an error)

$arr = Array('first' => 'hello', 'second' => 'world');
echo $arr[first];

 

However not using quotes on integer indexes won't throw an error (It's actually preferred).

 

PHP Processes integers faster than strings, so that's why $arr[0] would be faster than $arr['0'].

 

This really isn't how PHP works.  PHP has a hashed symbol table.  I doubt there's any noticeble difference, but technically there is probably a little bit more overhead in parsing:

 

$arr[0] compared to $arr['0']  -- that overhead being the need for PHP to check that zero is not a constant.  With that said, I would never bother to use $arr['0'] even though internally I know that all array indexes are strings.

[gizmola]

where should i apply the trim?

 

$piece1 = trim($array[0]);