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mattvot

They must have a name but I can't find it.

What's the arrow called?

ikthius

not sure you have it right but....

your variable is a variable, but it is looking for a logical answer, therefore it should be looking for a boolean value

mattvot

hmm, That sort of makes sense. Sometimes I see them with a function like:

$this->function();

ikthius

I found this online.....


function FillList ($sql, $selected=0)
{

$row = array();
$cnt = 0;
$this->query_fill=new Query ($sql, $this->conn);
$result=$this->query_fill->subExecute();
while ($row = mysql_fetch_row($result)) {

$id = $row[0];
$name = $row[1];

$cnt += 1;
if ($selected == $id) {
echo \"<OPTION value=$id selected>$name</OPTION>\";
} else {
echo \"<OPTION value=$id>$name</OPTION>\";
}
}

$this->query_fill->Free();
return $cnt;

lets take this example......
$this->query_fill=new Query ($sql, $this->conn);

Now I don't know the code or what it is really doing, but I will hazard a guess.
$this - this would be the this object, a bit like referencing itself
-> is porobably an SQL type command to attach the query_fill
= new Query()- this is just making a new object of Query
$sql, $this->conn - take the $sql variable and pass it in the new object
$this - referencing itself
->conn - maybe an sql command to make a connection.

so if your really more interested in the -> part of your question I would look up sql php interaction

http://www.w3schools.com/PHP/func_mysql ... object.asp
http://us.php.net/manual/en/function.my ... object.php

Sumeet Chawla

Well, pHp is quite similar to c / c++ and in c++, the term obj->item is used to access the item of the class of which obj is an object.
Don't know if it means the same here in pHP or not.Anyway, I have to brush up my C++ a bit.. been ages since I last used it. Am more of a C guy hehe. Will study a bit and get back to you :)

Argeaux

You use this when you access a variable which is set in a class. These variables are called properties of a class.

$this-> stands for a property in the current class you are working in. and hello for the name.


<?php

class Example {

public $hello = 'hello doug';
public $msg = 'how are you doing?';

 function test(){
  echo 'test';
 }
}
?>

So in the example above $this->hello stands for 'hello doug'.

Its used in objective oriented programming in php (or short: OOP).
So maybe you can find more info with those words.

Robskiwarrior

yup the guys above are right - you could set up a new object by assigning for example a class you made to connect to a database...

$this = new connection();

connection is the class you are accessing - inside the class are the functions - (well methods if they are inside a class - but hey...)

you can then access the functions/methods via the "->"

$this->addNew();

if you see "=>" that is what defines a key within an array - it can be a little double take-ish when you first see it though...

treehouse : what would you like to learn today?

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What do you call php variables like this: $this->hello