Variables and References Article
A week ago PHP 4.4.0rc1 was released - this release addresses major problems with references in PHP. But not many people are fully aware of how variables and references actually work in PHP. This is where my latest article in PHP Architect comes into play. It explains in details how assigning variables, passing variables to functions and returning variables from functions work - both by-value and by-reference.
Comments
Thanx for the article, it gives a deep insight into PHP internals.
However, there's one issue left unspoken, that is PHP5 objects internal model. It's obvious they're not just variables...
How are they implemented actually?
Consider the following lines in PHP5:
$a = new Foo(); $b = $a;
Is it equivalent internally in PHP5 to this:
$a = new Foo(); $b =& $a;
If not what the difference? Is it actually "healthy" to use & with objects in PHP5? Is there speed overhead?
I'm asking all these questions because we're using PHP5 with applications which were written solely for PHP4 yet using OOP. These applications use & almost everywhere and i wonder how PHP5 treats it internally....
Life Line
Updated a bar; Confirmed a restaurant
Updated 3 restaurants, a vacant shop, and a bar; Confirmed a cosmetics shop, a cafe, and 2 other objects
Created 2 benches and 2 waste_baskets
Deleted a cycle_barrier
Put Kilburn Park station node in a more representable location (not at the back of the building where you can't get in)
Merge branch 'v2022'
Go with 2022.17
Merge branch 'v2022'
Update PHP merging script
Update data to 2026c
Kensal Green sidewalks: Fix alignment and connectivity near station; don't map sidewalks as separate on residential streets for just this tiny section; extend sidewalk mapping on Chamberlayne Road
New building
If you're in London (or Southern England) the ISS is going to make a fly over pass between 23:30 and 23:40 (a little earlier for West of London).
If you're further North than London, the ISS shows further South.
Almost straight overhead. It's going to be bright.
#ISS #SpaceStation #SpaceFlight
Created a wigs shop
Updated a fitness_centre
Seems I removed the landuse/natural tags
Updated a restaurant
Created a bench
Updated a cafe
But I think my favourite photo was of this Carrion Crow in flight.
#Photography #BirdsOfFediverse #BirdPhotography #Nature
The new birds I saw, were mostly too far away to get good photos.
But I saw my first Spoonbill, Corn Bunting, and a flock of Black-tailed Godwits.
#BirdPhotography #BirdsOfFediverse
I had a lovely walk around RSPB Bowers Marsh yesterday, where I saw some expected birds, and a bunch of new species.
When I got there, there was this welcome committee of Starlings.
#BirdPhotography #nature #BirdsOfFediverse #Birds #Photography #RSPB
RSPB Bowers Marsh
Created 2 benches
Shortlink
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