RE: [PHP] What is - mean in php?
Because I'm not a hacker on the PHP engine, I don't really know but I also saw this symbol when learning C++ recently. It is used in C++ as a shortcut to dereferencing and accessing an objects properties/methods on objects which are on the free store (heap). Normally C++ uses the dot operator to access methods/properties (eg. foo.do()), but when the object needs to first be dereferenced, then foo-do() can be used as a shortcut to (*foo).do(). Of course, this doesn't help you at all does it :) But I thought it was an interesting connection to C++ and maybe hints at how PHP internally manages objects. Perhaps it's just a coincidence. [TK] -Original Message- From: S.Murali Krishna [mailto:[EMAIL PROTECTED]] Sent: Monday, 4 March 2002 9:48 PM To: Jack Cc: [EMAIL PROTECTED] Subject: Re: [PHP] What is - mean in php? If you have any Object Oriented Programming experience, then you may not had asked this. Its a operator to access methods, and variables inside a instance of a class , in which the variable before - is the instance of the class and the latter is a method or variable of that class. This is what I know, if you have any explanatory docs, pls let me know. On Mon, 4 Mar 2002, Jack wrote: Dear all There is one symbol in PHP that i always see is -, could anyone pls tell me what is this, and what does that do? Here is the statement i saw could some pls explain what it means? if (!empty($row-usd_period) Thx a lot Jack [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php [EMAIL PROTECTED] --- We must use time wisely and forever realize that the time is always ripe to do right. -- Nelson Mandela --- -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] What is - mean in php?
PHP uses - as C++ uses ., since PHP already uses . for strings. Stephano Mariani -Original Message- From: Kearns, Terry [mailto:[EMAIL PROTECTED]] Sent: Friday, 8 March 2002 12:28 AM To: 'S.Murali Krishna'; Jack Cc: [EMAIL PROTECTED] Subject: RE: [PHP] What is - mean in php? Because I'm not a hacker on the PHP engine, I don't really know but I also saw this symbol when learning C++ recently. It is used in C++ as a shortcut to dereferencing and accessing an objects properties/methods on objects which are on the free store (heap). Normally C++ uses the dot operator to access methods/properties (eg. foo.do()), but when the object needs to first be dereferenced, then foo-do() can be used as a shortcut to (*foo).do(). Of course, this doesn't help you at all does it :) But I thought it was an interesting connection to C++ and maybe hints at how PHP internally manages objects. Perhaps it's just a coincidence. [TK] -Original Message- From: S.Murali Krishna [mailto:[EMAIL PROTECTED]] Sent: Monday, 4 March 2002 9:48 PM To: Jack Cc: [EMAIL PROTECTED] Subject: Re: [PHP] What is - mean in php? If you have any Object Oriented Programming experience, then you may not had asked this. Its a operator to access methods, and variables inside a instance of a class , in which the variable before - is the instance of the class and the latter is a method or variable of that class. This is what I know, if you have any explanatory docs, pls let me know. On Mon, 4 Mar 2002, Jack wrote: Dear all There is one symbol in PHP that i always see is -, could anyone pls tell me what is this, and what does that do? Here is the statement i saw could some pls explain what it means? if (!empty($row-usd_period) Thx a lot Jack [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php [EMAIL PROTECTED] --- We must use time wisely and forever realize that the time is always ripe to do right. -- Nelson Mandela --- -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] What is - mean in php?
Used in conjunction with classes.
class Foo
{
var bar;
function Foo($bar)
{
$this-bar = $bar;
}
}
$foo = new Foo(foobar);
echo $foo-bar; // foobar
For interests sake here's the same in C++ (correct me if I'm wrong it's been
a long time since I used C++ or pointers).
class Foo
{
char *bar;
function Foo(bar)
{
this.bar = bar;
}
}
Foo *foo = new Foo(foobar);
cout (*foo).bar; // foobar
// which also works as.
cout foo-bar; // foobar
-Original Message-
From: Stephano Mariani [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 08, 2002 12:57
To: 'Kearns, Terry'; 'S.Murali Krishna'; 'Jack'
Cc: [EMAIL PROTECTED]
Subject: RE: [PHP] What is - mean in php?
PHP uses - as C++ uses ., since PHP already uses . for strings.
Stephano Mariani
-Original Message-
From: Kearns, Terry [mailto:[EMAIL PROTECTED]]
Sent: Friday, 8 March 2002 12:28 AM
To: 'S.Murali Krishna'; Jack
Cc: [EMAIL PROTECTED]
Subject: RE: [PHP] What is - mean in php?
Because I'm not a hacker on the PHP engine, I don't really know but I
also
saw this symbol when learning C++ recently. It is used in C++ as a
shortcut
to dereferencing and accessing an objects properties/methods on
objects
which are on the free store (heap). Normally C++ uses the dot operator
to
access methods/properties (eg. foo.do()), but when the object needs
to
first be dereferenced, then foo-do() can be used as a shortcut to
(*foo).do().
Of course, this doesn't help you at all does it :) But I thought it
was an
interesting connection to C++ and maybe hints at how PHP internally
manages
objects. Perhaps it's just a coincidence.
[TK]
-Original Message-
From: S.Murali Krishna [mailto:[EMAIL PROTECTED]]
Sent: Monday, 4 March 2002 9:48 PM
To: Jack
Cc: [EMAIL PROTECTED]
Subject: Re: [PHP] What is - mean in php?
If you have any Object Oriented Programming experience, then
you may not had asked this. Its a operator to access methods,
and variables inside a instance of a class , in which the
variable before - is the instance of the class and the
latter is a method or variable of that class. This is what I
know, if you have any explanatory docs, pls let me know.
On Mon, 4 Mar 2002, Jack wrote:
Dear all
There is one symbol in PHP that i always see is -, could
anyone pls
tell me what is this, and what does that do? Here is the
statement i
saw could some pls explain what it means?
if (!empty($row-usd_period)
Thx a lot
Jack
[EMAIL PROTECTED]
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To unsubscribe, visit: http://www.php.net/unsub.php
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RE: [PHP] What is - mean in php?
Hi In search of the definition for your question, I've came across an intersting Doc. Iam just giving here the snapshot of that. In PHP terms, the toplevel directory would be the global namespace, and the pathname separator would be -. Thus, the names $cart-items and $another_cart-items name two different variables. Note that the variable is named $cart-items, not $cart-$items, that is, a variable name in PHP has only a single dollar sign. The above para is stated in PHP Manual I done many tests on this operator, atlast I found that, its not only a dereferencing operator to access a variable or method, rather its a namespace seperator. We can create any hierarchy of name spaces with this op., on an object after creating it with 'new'. I'm still not clear about this. On Fri, 8 Mar 2002, Kearns, Terry wrote: Because I'm not a hacker on the PHP engine, I don't really know but I also saw this symbol when learning C++ recently. It is used in C++ as a shortcut to dereferencing and accessing an objects properties/methods on objects which are on the free store (heap). Normally C++ uses the dot operator to access methods/properties (eg. foo.do()), but when the object needs to first be dereferenced, then foo-do() can be used as a shortcut to (*foo).do(). Of course, this doesn't help you at all does it :) But I thought it was an interesting connection to C++ and maybe hints at how PHP internally manages objects. Perhaps it's just a coincidence. [TK] -Original Message- From: S.Murali Krishna [mailto:[EMAIL PROTECTED]] Sent: Monday, 4 March 2002 9:48 PM To: Jack Cc: [EMAIL PROTECTED] Subject: Re: [PHP] What is - mean in php? If you have any Object Oriented Programming experience, then you may not had asked this. Its a operator to access methods, and variables inside a instance of a class , in which the variable before - is the instance of the class and the latter is a method or variable of that class. This is what I know, if you have any explanatory docs, pls let me know. On Mon, 4 Mar 2002, Jack wrote: Dear all There is one symbol in PHP that i always see is -, could anyone pls tell me what is this, and what does that do? Here is the statement i saw could some pls explain what it means? if (!empty($row-usd_period) Thx a lot Jack [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php [EMAIL PROTECTED] --- We must use time wisely and forever realize that the time is always ripe to do right. -- Nelson Mandela --- -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php [EMAIL PROTECTED] --- We must use time wisely and forever realize that the time is always ripe to do right. -- Nelson Mandela --- -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] What is - mean in php?
If you have any Object Oriented Programming experience, then you may not had asked this. Its a operator to access methods, and variables inside a instance of a class , in which the variable before - is the instance of the class and the latter is a method or variable of that class. This is what I know, if you have any explanatory docs, pls let me know. On Mon, 4 Mar 2002, Jack wrote: Dear all There is one symbol in PHP that i always see is -, could anyone pls tell me what is this, and what does that do? Here is the statement i saw could some pls explain what it means? if (!empty($row-usd_period) Thx a lot Jack [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php [EMAIL PROTECTED] --- We must use time wisely and forever realize that the time is always ripe to do right. -- Nelson Mandela --- -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
