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PHP microtime() 函数
tryphp_func_microtime
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<!DOCTYPE html> <html> <body> <?php echo(microtime()); /** * 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"; ?> </body> </html>