Re: [PHP-DEV] how-to get array[0] and array["name"] to actually reference only 1 value?

[Zak Greant]

This list is for discussing issues that relate to the development of the PHP
language.  For mailing lists that discuss development with PHP, see
www.php.net/support.php

Also, even though [0] and ['id'] initially contain the same value, they are
not bound together in any way.  You may be able to accomplish what you
desire by using references. (See the manual section on references for more
information.

ie.  $q->data[0]["id"] =& $q->data[0][0];

--zak

- Original Message -
From: "Marc Boeren" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, February 09, 2001 2:37 AM
Subject: [PHP-DEV] how-to get array[0] and array["name"] to actually
reference only 1 value?


>
> What I'm trying to do is get the following php-script to work... (the only
> thing about this that doesn't work is in the fourth 'echo' line...)
>
> $db = dbx_connect("mysql", "localhost", "username", "password"); // works
> $result = dbx_query($db, "use dbname"); // works
> $q = dbx_query($db, "select id from tbl"); // works
>
> // now I have the results in a 2D array, q->data[row][col]
> // where col can be either an index or a fieldname
> echo $q->data[0][0]; // works, displays first returned id, say 17
> echo $q->data[0]["id"]; // works, displays first returned id (17)
>
> // now I want to change the first returned id...
> $q->data[0][0] = 12345;
>
> // what I want is that the next two lines BOTH reflect the change
> echo $q->data[0][0]; // works, displays changed id (12345)
> echo $q->data[0]["id"]; // doesn't work like I would like, still displays
> first returned id (17)
>
> // This is the same behaviour that you get when you use the
mysql-functions
> // directly, so no help there... (you can still combine these functions
with
> the
> // mysql-functions, if needed, like
> $fieldtype = mysql_field_type($q->handle, 0);
> // )
>
> $result = dbx_close($db); // works ( $result = mysql_close($db->handle);
> works too, BTW )
>
>
> Currently I don't think this can be done the way I would like it to work.
> Can anybody contradict me on this?
>
> Cheerio, Marc.
>
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>


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RE: [PHP-DEV] how-to get array[0] and array["name"] to actually reference only 1 value?

[Marc Boeren]

>Also, even though [0] and ['id'] initially contain the same value, they are
>not bound together in any way.  You may be able to accomplish what you
>desire by using references. (See the manual section on references for more
>information.

>ie.  $q->data[0]["id"] =& $q->data[0][0];

How can I create such a reference in code?
Now I'm using zend_hash_index_update and zend_hash_update for $q->data[0][0]
and $q->data[0]["id"], but that doesn't create a reference. So how should I
code this?

Cheerio, Marc.


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RE: [PHP-DEV] how-to get array[0] and array["name"] to actually reference only 1 value?

[Marc Boeren]

>not bound together in any way.  You may be able to accomplish what you
>desire by using references. (See the manual section on references for more
>information.

> ie.  $q->data[0]["id"] =& $q->data[0][0];

After looking for references in the php-code, I found something that seems
to work ok (zend_assign_to_variable_reference):

zval *dummy, *value, **x_ptr, **y_ptr;
MAKE_STD_ZVAL(value); 
ZVAL_LONG(value, 10);
ALLOC_ZVAL(dummy);
INIT_ZVAL(*dummy);  
zend_hash_update(return_value->value.obj.properties, "x", sizeof("x"),
&value, sizeof(zval *), (void **) &x_ptr);
zend_hash_update(return_value->value.obj.properties, "y", sizeof("y"),
&dummy, sizeof(zval *), (void **) &y_ptr);
zend_assign_to_variable_reference(NULL, y_ptr, x_ptr, NULL ELS_CC);

This leads me to another question: how do I obtain the x_ptr (from the
example) if the zend_hash_update was done elsewhere and no ptr was passed
then???

zend_hash_update(return_value->value.obj.properties, "x", sizeof("x"),
&value, sizeof(zval *), NULL);
[...]
// How do I get the x_ptr ???
zend_hash_update(return_value->value.obj.properties, "y", sizeof("y"),
&dummy, sizeof(zval *), (void **) &y_ptr);
zend_assign_to_variable_reference(NULL, y_ptr, x_ptr, NULL ELS_CC);

Cheerio, Marc.

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RE: [PHP-DEV] how-to get array[0] and array["name"] to actually reference only 1 value?

[Marc Boeren]

OK, zend_hash_find and zend_hash_index_find do the trick...

Cheerio, Marc.


>This leads me to another question: how do I obtain the x_ptr (from the
example) if the zend_hash_update was done elsewhere and no ptr was passed
then???

>zend_hash_update(return_value->value.obj.properties, "x", sizeof("x"),
&value, sizeof(zval *), NULL);
>[...]
>// How do I get the x_ptr ???
>zend_hash_update(return_value->value.obj.properties, "y", sizeof("y"),
&dummy, sizeof(zval *), (void **) &y_ptr);
>zend_assign_to_variable_reference(NULL, y_ptr, x_ptr, NULL ELS_CC);


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Re: [PHP-DEV] how-to get array[0] and array["name"] to actually reference only 1 value?

[Zak Greant]

Well, I guess that hacking the php source would work. :)  However, I was
just thinking that you Could do something like this:

(Note - not tested! :)

while (list ($key, $value) = mysql_fetch_array ($result, MYSQL_ASSOC)) {
$data[] =& $data[$key] = $value;
}

--zak

- Original Message -
From: "Marc Boeren" <[EMAIL PROTECTED]>
To: "'Zak Greant'" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>
Sent: Monday, February 12, 2001 2:25 AM
Subject: RE: [PHP-DEV] how-to get array[0] and array["name"] to actually
reference only 1 value?


>
> >not bound together in any way.  You may be able to accomplish what you
> >desire by using references. (See the manual section on references for
more
> >information.
>
> > ie.  $q->data[0]["id"] =& $q->data[0][0];
>
> After looking for references in the php-code, I found something that seems
> to work ok (zend_assign_to_variable_reference):
>
> zval *dummy, *value, **x_ptr, **y_ptr;
> MAKE_STD_ZVAL(value);
> ZVAL_LONG(value, 10);
> ALLOC_ZVAL(dummy);
> INIT_ZVAL(*dummy);
> zend_hash_update(return_value->value.obj.properties, "x", sizeof("x"),
> &value, sizeof(zval *), (void **) &x_ptr);
> zend_hash_update(return_value->value.obj.properties, "y", sizeof("y"),
> &dummy, sizeof(zval *), (void **) &y_ptr);
> zend_assign_to_variable_reference(NULL, y_ptr, x_ptr, NULL ELS_CC);
>
> This leads me to another question: how do I obtain the x_ptr (from the
> example) if the zend_hash_update was done elsewhere and no ptr was passed
> then???
>
> zend_hash_update(return_value->value.obj.properties, "x", sizeof("x"),
> &value, sizeof(zval *), NULL);
> [...]
> // How do I get the x_ptr ???
> zend_hash_update(return_value->value.obj.properties, "y", sizeof("y"),
> &dummy, sizeof(zval *), (void **) &y_ptr);
> zend_assign_to_variable_reference(NULL, y_ptr, x_ptr, NULL ELS_CC);
>
> Cheerio, Marc.


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RE: [PHP-DEV] how-to get array[0] and array["name"] to actually reference only 1 value?

[Marc Boeren]

>Well, I guess that hacking the php source would work. :)  However, I was
>just thinking that you Could do something like this:

>while (list ($key, $value) = mysql_fetch_array ($result, MYSQL_ASSOC)) {
>$data[] =& $data[$key] = $value;
>}

I could, but since I'm writing a database abstraction module I'm wrapping
the mysql-routines (and other db's as well, but since I just started it's
only mysql for now).
Anyway, basic functionality (including the references) now works on win, so
I'll try and compile it on my Linux-box.

Cheerio, Marc.
(BTW, why a cc to the bug database?)

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