//計(jì)時(shí)開(kāi)始
runtime();
 
//執(zhí)行查詢(xún)
mysql_query($sql);
 
//計(jì)時(shí)結(jié)束.
echo runtime(1);
 
//計(jì)時(shí)函數(shù) 
function runtime($mode=0) {
 static $t; 
 if(!$mode) { 
  $t = microtime();
  return;
 } 
 $t1 = microtime(); 
 list($m0,$s0) = explode(" ",$t); 
 list($m1,$s1) = explode(" ",$t1); 
 return sprintf("%.3f ms",($s1+$m1-$s0-$m0)*1000);
}

public function execute($sql) {
　　//code...

/*檢測(cè)sql執(zhí)行時(shí)間，超過(guò)執(zhí)行時(shí)間記錄到日志中*/
$start_time = array_sum(explode(' ', microtime()));

$this->lastresult = mysql_query($sql,$this->link) or $this->displayerror($sql);

$end_time = array_sum(explode(' ', microtime()));
$differ = $end_time - $start_time;
if($differ >0.001){    //修改時(shí)間范圍，單位：秒
 putContent('sqlLOG', date('Y-m-d H:i:s', $start_time)." "
  . date('Y-m-d H:i:s', $end_time)." "
  .$differ. " ".$sql."\r\n");
}


　　//code...
}

 
// garvin: Measure query time.
// TODO-Item http://sourceforge.net/tracker/index.php?func=detail&aid=571934&group_id=23067&atid=377411

$querytime_before = array_sum(explode(' ', microtime()));
$result = @PMA_DBI_try_query($full_sql_query, null, PMA_DBI_QUERY_STORE);
$querytime_after = array_sum(explode(' ', microtime()));
$GLOBALS['querytime'] = $querytime_after - $querytime_before;

profiling_history_size
The number of statements for which to maintain profiling information if profiling is enabled. The default value is 15. The maximum value is 100. Setting the value to 0 effectively disables profiling.

<?php
function getMillisecond() {
list($t1, $t2) = explode(' ', microtime());
return (float)sprintf('%.0f',(floatval($t1)+floatval($t2))*1000);
}
echo getMillisecond();