I was wondering if using
foreach(get_some_array() as $boo) do_something...
is slower than
$arr = get_some_array();
foreach($arr as $boo) do_something...
I mean would get_some_array() be called like 10000000 times if the array would h开发者_运维百科ave so many elements (in the 1st example) ?
No, that function will be called just 1 time. You can verify this by doing:
<?php
function get()
{
echo "getting\n";
return array('a', 'b', 'c', 'd');
}
foreach (get() as $v) {
echo $v . "\n";
}
?>
Here it outputs:
murilo@mac:regionais$ php -f teste.php
getting
a
b
c
d
$arr = get_some_array(); theoretically adds zero time to this equation, so it really wont make a difference what you use here.
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