強制顯示常規十進制數

Question

我正在運行無所作爲的基準測試，因此結果非常快。

這裏是我的代碼：

$time_start = microtime(true); 
//Do Nothing... 
$time = microtime(true) - $time_start; 

echo 'Took '.$time.' seconds<br>'; 

問題是，當我嘗試回聲我得到這個結果：

Took 1.3828277587891E-5 seconds 

我期待獲得像一個普通的十進制數：

Took 0.000000008231 seconds 

是否有可能強制php將其顯示爲普通十進制數？

Answer 1

如果你想你的大數字，那就試試這個：

//$i = gmp_init($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

鐵道部的相關信息http://php.net/manual/en/function.gmp-strval.php

Answer 2

可以使用printf或sprintf功能。下面是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 

您例如樣品，你可以使用 - 因爲實例 - ：

<?php 
$time_start = microtime(true); 
//Do Nothing... 
$time = microtime(true) - $time_start; 

echo 'Took '.sprintf("%f",$time).' seconds<br>'; 

你甚至可以更改精度是這樣的：

sprintf("%.1f",$time) // -> 0.0 seconds 

sprintf("%.10f",$time) // -> 0.0000059605 seconds 

Answer 3

可以使用number_format（） 檢查http://php.net/number_format