Comment bien programmer en PHP ?

Bonjour

ma question et la suivante :

Comment bien programmer en PHP ?

Donc si vous avez des conseils, des truc à utiliser/éviter et d'autres choses.

Par exemple :
Code le plus court :
Code :

for ($i=0; $i<count($array); $i++)
{
echo $array[$i];
}

Code le plus rapide :
Code :

$count = count($array);
for ($i=0; $i<$count; $i++)
{
echo $array[$i];
}

Merci d'avance​

 

I get what you are trying to say but the main language of this forum is English UK/US.
I would suggest you to edit your post because a mod may give you an infraction for it.

No Offence

 

hrm... interesting. obviously, it will differ between callback and w/o it.
in javascript, for example, the fastest loop can be achieved by a while(count--) { } where count is set to array.length.

i coded a test for 4 common ways of walking array elements in PHP, timing how long it takes to process in ms:

<?PHP 

// populate the array
for ($ii = 0; $ii < 1000; ++$ii)
    $array[] = rand(100000,100000+1000);
    
// loop 1, with callback to count function
$timeStart = microtime();
for ($i=0; $i < count($array); ++$i) 
    echo $array[$i] . " ";

echo "<h1>for loop, with count() callback: " .(microtime() - $timeStart) . " ms</h1>";

// loop 2, count predefined.
$timeStart = microtime();
$count = count($array);
for ($i = 0; $i < $count; $i++) 
    echo $array[$i] . " ";

echo "<h1>for loop, no count() callback: " .(microtime() - $timeStart) . " ms</h1>";

// loop 3. reverse loop 
$timeStart = microtime();
$count = count($array);
while ($count--) 
    echo $array[$count] . " ";

echo "<h1>while() reducing: " .(microtime() - $timeStart) . " ms</h1>";

// loop 4, foreach 
$timeStart = microtime();
foreach($array as $item) 
    echo $item . " ";
    
echo "<h1>foreach loop: " .(microtime() - $timeStart) . " ms</h1>";
?>

PHP:

here are my results:
for loop, with count() callback: 0.001327 ms
for loop, no count() callback: 0.00087000000000001 ms
while() reducing: 0.00096599999999999 ms
foreach loop: 0.00062400000000001 ms

winner: foreach.

if anyone else wants to comment on this - etc - i know the results are not conclusive enough and would vary dependent on my server load etc - this needs to run 1000 times and get averages... but i'll be interested in hearing people from their experience.