Compare Php MicroTime with C++

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Hello Everyone,

I have two functions in PHP one returns the microtime and the other one returns the float value of it.

PHP

$time_start = microtime();
or
$time_start = microtime_float();

function microtime_float()
{
	$microtime = microtime(); 
	$components = explode(' ', $microtime); 
	return sprintf('%d%03d', $components[1], $components[0] * 1000); 
}

This time($time_start) is stored in a text file timex.txt, i have to read this time(the text file timex.txt) in C++ and have to delete this file if the time($time_start) is older than 1 minute.

I tried everywhere online to compare times of C++ with php time. How do i achieve this?

In Simple words, i have to store a php time in a file, and compare it with current time in C++ and delete the file if the stored time is older than one minute.

Posted 28-Jun-12 10:00am

amarasat

Updated 28-Jun-12 10:02am

v2

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Volynsky Alex · Accepted Answer · 2012-06-28T13:35:00

Which type of the operating system you use?
Please provide a lot more detail about this.

If you use the Win, then :

You can use following function of WinAPI

BOOL GetFileTime(
HANDLE hFile,
LPFILETIME lpCreationTime,
LPFILETIME lpLastAccessTime,
LPFILETIME lpLastWriteTime
);

BOOL FileTimeToSystemTime(
const FILETIME* lpFileTime,
LPSYSTEMTIME lpSystemTime
);

If you need a other way,
You can following way for Unix platforms:

#include
#include <unistd.h>
#include <time.h>

struct tm* clock; // create a time structure
struct stat attrib; // create a file attribute structure
stat("afile.txt", &attrib); // get the attributes of afile.txt
clock = gmtime(&(attrib.st_mtime));

where:

struct stat {
dev_t st_dev; /* ID of device containing file */
ino_t st_ino; /* inode number */
mode_t st_mode; /* protection */
nlink_t st_nlink; /* number of hard links */
uid_t st_uid; /* user ID of owner */
gid_t st_gid; /* group ID of owner */
dev_t st_rdev; /* device ID (if special file) */
off_t st_size; /* total size, in bytes */
blksize_t st_blksize; /* blocksize for file system I/O */
blkcnt_t st_blocks; /* number of 512B blocks allocated */
time_t st_atime; /* time of last access */
time_t st_mtime; /* time of last modification */
time_t st_ctime; /* time of last status change */
};
Or see here:
http://www.freebsd.org/cgi/man.cgi?query=stat&apropos=0&sektion=2&manpath=FreeBSD+5.3-RELEASE+and+Ports&format=html[^]

Regards,
Alex.

User 59241 · Accepted Answer · 2012-06-28T18:07:00

There is an error in you function. Should read:

PHP

return sprintf('%d.%03d', $components[1], $components[0] * 1000);

Also it does not return a float but a string.

Now to deal with time in seconds read as a string from a file and compared to current time the following may help.

C#

char *floatTime = "1340942352.678";

bool bTest = false;

time_t tNow = 0;

while(!bTest)
{

::time(&tNow);  // Get current time in seconds since epoch.

if((tNow - (time_t) ::atof(floatTime)) > 60)
    bTest = true;
}

Compare Php MicroTime with C++

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