<?php
function test($x)
{
$a = 0;
for($i = 0; $i < $x; ++$i)
{
//1.40s Reassign and use $a.
//$a += 1;
//1.15s Use and increment $a.
//$a++;
//0.88s Increment and use $a.
//++$a;
//0.69s Do nothing.
}
echo "Time for $x was " . ($t2 - $t1) . "\n";
return $a;
}
echo test(1e8);
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