我正在运行一个什么都不做的基准测试，所以结果非常快。
这是我的代码：
$time_start = microtime(true);
//Do Nothing...
$time = microtime(true) - $time_start;
echo 'Took '.$time.' seconds<br>';
问题是当我尝试回显我得到的结果时：
Took 1.3828277587891E-5 seconds
我希望得到一个常规的十进制数，例如：
Took 0.000000008231 seconds
是否可以强制 php 将其显示为常规十进制数？
如果你想要你的大数字，那么试试这个：
//$i = gmp_init( $time ); // i think you need that only if you want convert a string to an int/flaot
echo gmp_strval( $time );
gmp_strval PHP> 4.0.4/PHP 5
。莫尔信息 http://php.net/manual/en/function.gmp-strval.php
您可以使用
printf或sprintf函数。以下是 http://php.net/manual/en/function.sprintf.php
<?php
$n = 43951789;
$u = -43951789;
$c = 65; // ASCII 65 is 'A'
// notice the double %%, this prints a literal '%' character
printf("%%b = '%b''n", $n); // binary representation
printf("%%c = '%c''n", $c); // print the ascii character, same as chr() function
printf("%%d = '%d''n", $n); // standard integer representation
printf("%%e = '%e''n", $n); // scientific notation
printf("%%u = '%u''n", $n); // unsigned integer representation of a positive integer
printf("%%u = '%u''n", $u); // unsigned integer representation of a negative integer
printf("%%f = '%f''n", $n); // floating point representation
printf("%%o = '%o''n", $n); // octal representation
printf("%%s = '%s''n", $n); // string representation
printf("%%x = '%x''n", $n); // hexadecimal representation (lower-case)
printf("%%X = '%X''n", $n); // hexadecimal representation (upper-case)
printf("%%+d = '%+d''n", $n); // sign specifier on a positive integer
printf("%%+d = '%+d''n", $u); // sign specifier on a negative integer
对于您的示例，您可以使用 -例如- ：
<?php
$time_start = microtime(true);
//Do Nothing...
$time = microtime(true) - $time_start;
echo 'Took '.sprintf("%f",$time).' seconds<br>';
您甚至可以通过这种方式更改精度：
sprintf("%.1f",$time) // -> 0.0 seconds
sprintf("%.10f",$time) // -> 0.0000059605 seconds
你可以使用 number_format（）检查 http://php.net/number_format