php记录程序执行时间microtime

/**
 * 记录程序程序时间---只能记录连续的调用改函数
 * @param
$time_key
记录的key，多次执行可以指定同一个key
 * @return
none
没有返回值，直接获取全局变量$time_arr，如果是在方法中调用需要先global一次
 **/
function showExecuTime($time_key = '') {
global $time_arr,$time_start,$time_end,$time_num;
$time_now = microtime(true);
if ( !$time_num ) {
$time_num = 0;
}
$time_num++;
if ( $time_num%2 == 1 ) {
$time_start = $time_now;
} else {
$time_end = $time_now;
}
if ( $time_num %2 == 0 && $time_start && $time_end ) {
$time = $time_end - $time_start;
if ( $time_key ) {
$time_arr[$time_key] += $time;
} else {
$time_arr[] = $time;
}
$time_arr['total'] += $time;
}
}
/**
 * 记录程序程序时间---可以多次交叉的调用
 * @param
$time_key
记录的key，多次执行可以指定同一个key
 * @return
none
没有返回值，直接获取全局变量$time_arr，如果是在方法中调用需要先global一次
 **/
function showExecuTime($time_key = '') {
global $time_arr,$time_key_arr,$time_num;
$time_now = microtime(true);
if ( !$time_key ) {
if ( !$time_num ) {
$time_num = 0;
}
$time_num++;
$time_key = floor(($time_num+1)/2) - 1;
}
// 记录本次是开始时间还是结束时间
if ( !isset($time_key_arr[$time_key])) {
$time_key_arr[$time_key]['num'] = 0;
}
$time_key_arr[$time_key]['num']++;
if ( $time_key_arr[$time_key]['num']%2 == 1 ) {
$time_key_arr[$time_key]['time_start'] = $time_now;
} else {
$time_key_arr[$time_key]['time_end'] = $time_now;
}
// 如果连续记录2次，计算结果
if ( $time_key_arr[$time_key]['num'] %2 == 0 && $time_key_arr[$time_key]['time_start'] && $time_key_arr[$time_key]['time_end'] ) {
$time = $time_key_arr[$time_key]['time_end'] - $time_key_arr[$time_key]['time_start'];
$time_arr[$time_key] += $time;
$time_arr['total'] += $time;
}
}
showExecuTime('all');
showExecuTime();
sleep(1);
showExecuTime('all');//////
sleep(1);
showExecuTime();
sleep(1);
showExecuTime();
sleep(1);
showExecuTime();
showExecuTime('a');
sleep(1);
showExecuTime('a');
// showExecuTime('all');//////
print_r($time_arr);
print_r($time_key_arr);

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