getmicrotime은 php microtime을 split해서 배열변수로 만드는 사용자내부함수...펌

microtime — Return current Unix timestamp with microseconds

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설명

mixed microtime ([ bool $get_as_float = false ] )

microtime() returns the current Unix timestamp with microseconds. This function is only available on operating systems that support the gettimeofday() system call.

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인수

get_as_float

If used and set to TRUE, microtime() will return a float instead of a string, as described in the return values section below.

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반환값

By default, microtime() returns a string in the form "msec sec", where sec is the current time measured in the number of seconds since the Unix epoch (0:00:00 January 1, 1970 GMT), and msec is the number of microseconds that have elapsed since sec expressed in seconds.

If get_as_float is set to TRUE, then microtime() returns a float, which represents the current time in seconds since the Unix epoch accurate to the nearest microsecond.

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변경점

버전	설명
5.0.0	The get_as_float parameter was added.

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예제

Example #1 Timing script execution with microtime()

<?php
/**
 * Simple function to replicate PHP 5 behaviour
 */
function microtime_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 seconds\n";
?>

Example #2 Timing script execution in PHP 5

<?php
$time_start = microtime(true);

// Sleep for a while
usleep(100);

$time_end = microtime(true);
$time = $time_end - $time_start;

echo "Did nothing in $time seconds\n";
?>