测试代码效率
begin($start);report($start);
begin($start);
report($start);
report($start);
<?php
function begin(&$start) {
$tmp = gettimeofday();
$start = $tmp[usec];
}
function report($start) {
$tmp = gettimeofday();
$now = $tmp[usec];
echo "time consuming: ";
echo $now - $start;
echo "<br>";
}
function getRandNum($length = 8) {
$salt = substr(uniqid(rand()), -$length);
return $salt;
}
$start = 0;
begin($start);
$str="";
while (strlen($str)< 10000)
{
$str.=getRandNum(1);
}
report($start);
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