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
Created a bench and a crossing
Created 2 benches and a crossing; Updated 5 cushions, a post_box, and a crossing
Created a crossing; Updated a cushion
If you were wondering whether the www.php.net & downloads.php.net services weren't responding very well in the last 6 hours — thousands of requests/sec to https://www.php.net/ 's root.
The server's load was 720, didn't die, but CDN connections to it timed out.
Now there is a caching strategy in place for a selected set of resources.
Updated a bench
Created 3 benches; Updated 10 benches
Updated a bench
Updated a bus_stop
Created a bench and a waste_basket; Updated 6 bus_stops and a crossing
Created 2 waste_baskets and a recycling; Updated 2 bicycle_parkings and a recycling
Updated a fast_food, a funeral_directors shop, and 2 other objects; Confirmed a fast_food and a hairdresser shop
Created an information; Updated 3 benches and 2 waste_baskets
Updated 2 benches and a waste_basket
Updated a bench
Created a waste_basket and an information
Created a waste_basket
I hiked 18.0km in 4h1m52s
I walked 1.4km in 17m19s
I walked 4.5km in 1h21m49s
I just made and ate, a bowl full of bacon fried Brussels Sprouts. Not under duress, and out of my own free will.
#winning #food #BrusselsSprouts
Added new residential building
Created a hairdresser shop; Confirmed a convenience shop and a dry_cleaning shop
Created a building_materials shop, a vacant shop, and 4 other objects; Confirmed a hairdresser shop, a cafe, and 2 other objects
I walked 8.3km in 1h33m44s
Shortlink
This article has a short URL available: https://drck.me/vara-41v