PHP Performance

I have some more PHP Performance notes somewhere, but this is all that I can find right now.

• Use for loops over foreach loops
• Use ‘ over “, unless you are parsing variables
• Use echo over print

For Loops
Use either of the following syntax for your for loops. They take about the same amount of time to execute

$count = count($arr);
for ($i = 0; $i < $count; $i++) { }
 
for ($i = 0, $count = count($arr); $i < $count; $i++) { }

DO NOT use the following, it is significantly slower:

for ($i = 0; $i < $count($arr); $i++) { }