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
A Small Selection of the Oystercatchers at Snettisham
About a few hundred Oystercatchers are sitting, sleeping, and walking around on a bank. Some are foraging at the shore.
#photography #Birds #BirdPhotography #BirdsOfFediverse #NaturePhotography #wildlife #Norfolk #RSPB
I hiked 8.6km in 5h39m13s
Brown Hare
Altough we were looking for birds, we couldn't not observe this lovely hare munching away in the grass. It had clearly seen us, but didn't seem to be bothered.
#photography #NaturePhotography #wildlife #Norfolk
Confirmed a restaurant
Updated 2 restaurants and a cosmetics shop; Confirmed a restaurant
Updated a restaurant
I walked 7.4km in 1h15m40s
Redshank Strolling On The Mud
This lovely bird was mooching about white close by on the mudflat at Brancaster Staithe. Picking through the puddles and mud to find something to eat.
#photography #Birds #BirdPhotography #BirdsOfFediverse #NaturePhotography #wildlife #Norfolk
Specify whether public transport stops have bins
Determine whether amenities are inside buildings
Specify whether public transport stops have tactile paving
Determine place names
Survey if vacant places are still vacant
Survey if places still exist
Determine roads lane count
Specify whether there are crossings at intersections of paths and roads
Survey tactile paving on steps
Specify whether steps have a ramp
Specify which way leads up for steps
Specify whether steps have handrails
Survey if places still exist
Specify cycle barrier installation
Specify cycle barrier types
Specify whether roads have lane markings
Specify whether there are cycleways
Shortlink
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