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<?php
function getmicrotime(){
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
//Àý×Ó
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$time_start = getmicrotime();
//ÕâÀï·ÅÄãµÄ´úÂë
//½áÊø
$time_end = getmicrotime();
$time = $time_end - $time_start;
echo "Did nothing in $time seconds"; //Êä³öÔËÐÐ×Üʱ¼ä
?>
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function bubble_sort($arr) {
$cnt = count($arr);
if($cnt<=0) return false;
for($i=0; $i<$cnt;$i++) {
for($j=$cnt-1; $j>$i;$j--) {
if($arr[$j]<$arr[$j-1]) {
$tmp = $arr[$j];
$arr[$j] = $arr[$j ......
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