Edit report at https://bugs.php.net/bug.php?id=65305&edit=1
ID: 65305
User updated by: ryan at skidmore dot pro
Reported by: ryan at skidmore dot pro
Summary: $this keyword is treated like a variable under
certain circumstances
Status: Not a bug
Type: Bug
Package: Class/Object related
Operating System: Linux/Ubuntu
PHP Version: 5.4.17
Block user comment: N
Private report: N
New Comment:
$this is used universally as essentially a keyword that can be used to access
something within the current class, and while it isn't technically a keyword -
I
think it should be treated like one in terms of capitalisation.
Previous Comments:
------------------------------------------------------------------------
[2013-07-21 15:05:53] [email protected]
Why would it be logical? PHP treats all variables case-sensitively, so it's not
really obvious to me why $this should be any different in this regard.
------------------------------------------------------------------------
[2013-07-21 15:03:08] ryan at skidmore dot pro
Surely it would be logical to treat $This exactly the same as $this though?
------------------------------------------------------------------------
[2013-07-21 14:54:36] [email protected]
$this *is* a variable and variables in PHP are case-sensitive. Thus your code
makes a method call on null, which results in a fatal error.
------------------------------------------------------------------------
[2013-07-21 14:47:47] ryan at skidmore dot pro
Description:
------------
When capitalising the first letter of the $this keyword to $This and then
assigning it to a variable (with appropiate class structures) like this:
"$Variable = $This->Class1->Function1();" causes PHP to throw an error and not
display the page, when $This is changed to $this, it works fine.
Test script:
---------------
This test script is fit into two parts, for two separate files.
** UNCOMMENT THE LINES TO REPRODUCE PROBLEM
** FILE 1 ** (The file to be run)
Class Class1
{
Public $Class2Inst;
Public function __construct()
{
include("phpbug2.php"); // ******* Change this to the path of
the other file.
$this->Class2Inst = new Class2;
//$Variable1 = $This->Class2Inst->Func1(); // This produces
error
//$Variable2 = $this->Class2Inst->Func1(); // This does not
produce error
echo $Variable2;
}
}
$Class1Inst = new Class1;
** FILE 2 ** The file that gets included
Class Class2
{
Public function Func1()
{
return "Function 1 is being run";
}
}
Expected result:
----------------
The expected result is that Func1 within the Class2 class is run.
Actual result:
--------------
The $This keyword is treated like a variable, instead of like a keyword.
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=65305&edit=1
