Calculate the execution time of PHP scripts in sections_PHP tutorial

Many times we need to calculate the execution time of a PHP script to know the efficiency of the script and other issues. For example, if there is a large PHP script, we need a method to obtain the script execution time in segments. First introduce the functions to be used:

// 计时函数 
function runtime($mode = 0) { 
	static $t; 
    if(!$mode) { 
		$t = microtime(); 
		return; 
    } 
    $t1 = microtime(); 
    list($m0,$s0) = split(" ",$t);
    list($m1,$s1) = split(" ",$t1);
    return sprintf("%.3f ms",($s1+$m1-$s0-$m0)*1000); 
} 

runtime(); //计时开始 
/*
// 要计算的PHP脚本
$result = 0;
for($i = 0; $i < 100; $i++)
{
	$result += $i;
}
echo $result;
*/

echo runtime(1); //计时结束并输出计时结果

runtime(); //计时开始 
/*
// 要计算的PHP脚本
$result = 0;
for($i = 0; $i < 100; $i++)
{
	$result += $i;
}
echo $result;
*/

echo runtime(2); //计时结束并输出计时结果  

microtime() function

The microtime() function returns the current Unix timestamp and microseconds.

microtime(get_as_float), parameter get_as_float, if the get_as_float parameter is given and its value is equivalent to TRUE, this function will return a floating point number.

<?php
	echo(microtime());
?>

If called without optional parameters, this function returns a string in the format "msec sec", where sec is the number of seconds since the Unix epoch (0:00:00 January 1, 1970 GMT) , msec is the microsecond part. Both parts of the string are returned in seconds.

Program output:

0.25139300 1138197510

Now you can calculate the execution time of the PHP script in segments.

http://www.bkjia.com/PHPjc/752470.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/752470.htmlTechArticleMany times we need to calculate the execution time of a PHP script to know the efficiency of the script and other issues. For example, if there is a large PHP script, we need to obtain the script execution time in segments...