By default, microtime() returns a string in the form "msec sec", where sec is the number of seconds since theUnixepoch (0:00:00 January 1,1970 GMT), and msec measures microseconds that have elapsed since sec and
<?php$time_start = microtime(true);// Sleep 一会usleep(100);$time_end = microtime(true);$time = $time_end - $time_start;echo "Did nothing in $time seconds\n";?> 示例#2 microtime() 和REQUEST_TIME_FLOAT <?php// 随机 sleep 时间usleep(mt_rand(100, 10000));// 在 $_SERVER 超全...
1. 使用 microtime() 函数:microtime() 函数返回当前的 Unix 时间戳和微秒数。可以在程序开始和结束的地方调用这个函数,然后计算时间差,从而得到程序的运行时间。示例代码如下: “`php $start_time = microtime(true); // 在这里写要测试的 PHP 程序 $end_time = microtime(true); $execution_time = $end_...
functionmicrotime_float() { list($usec,$sec) =explode(" ", microtime()); return((float)$usec+ (float)$sec); } $time_start= microtime_float(); // Sleep for a while usleep(100); $time_end= microtime_float(); $time=$time_end-$time_start; echo"Did nothing in $time secondsn"; ...
(microseconds): " . $microtime . "\n"; // 将微妙时间戳转换为秒 $seconds = (int)($microtime); echo "Microseconds to seconds: " . $seconds . "\n"; // 计算两个时间点之间的差值(微妙) $start = microtime(true); sleep(1); // 模拟耗时操作 $end = microtime(true); $diff = $end...
示例#2 microtime() 和REQUEST_TIME_FLOAT <?php// 随机 sleep 时间usleep(mt_rand(100, 10000));// 在 $_SERVER 超全局数组中 REQUEST_TIME_FLOAT 是有效的。// 包含请求开始的时间戳,精度为微秒。$time = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];echo "Did nothing in $time seconds\n...
$time_end=microtime_float(); $time=$time_end-$time_start; echo"Did nothing in$timeseconds\n"; ?> date date — 格式化一个本地时间/日期 说明 string date ( string $format [, int $timestamp ] ) 返回将整数 timestamp 按照给定的格式字串而产生的字符串。如果没有给出时间戳则使用本地当前时...
The microtime() function returns the current Unix timestamp with microseconds. Syntax microtime(return_float); Parameter Values ParameterDescription return_floatOptional. When set to TRUE it specifies that the function should return a float, instead of a string. Default is FALSE ...
$end_time = microtime(true); “` 4. 计算SQL查询的执行时间,即`$end_time`减去`$start_time`的差值,并将结果以适当的格式输出。 “`php $execution_time = $end_time – $start_time; echo “SQL Execution Time: ” . $execution_time . ” seconds”; ...
常用的方法有三种:time(),microtime(),strotime("now") 1<?php2error_reporting(E_ALL^E_STRICT);3echo"time is ".time()."\n";4echo"strotime is ".strtotime("now")."\n";5echo"mktime is ".mktime()."\n";6echo"microtime is ".microtime()."\n";7//参数设置为true返回浮点数表示的时...