php检测服务器的运行_php教程_php教程

// 检测函数支持

function isfun($funName) {

return (false !== function_exists($funName))?'支持':'<font color=red>不支持</font>';

}

//整数运算能力测试

function test_int() {

$timeStart = gettimeofday();

for($i = 0; $i < 3000000; $i++) {

$t = 1+1;

}

$timeEnd = gettimeofday();

$time = ($timeEnd["usec"]-$timeStart["usec"])/1000000+$timeEnd["sec"]-$timeStart["sec"];

$time = round($time, 3)."秒";

return $time;

}

//浮点运算能力测试

function test_float() {

//得到圆周率值

$t = pi();

$timeStart = gettimeofday();

for($i = 0; $i < 3000000; $i++) {

//开平方

sqrt($t);

}

$timeEnd = gettimeofday();

$time = ($timeEnd["usec"]-$timeStart["usec"])/1000000+$timeEnd["sec"]-$timeStart["sec"];

$time = round($time, 3)."秒";

return $time;

}

//IO能力测试

function test_io() {

$fp = @fopen(PHPSELF, "r");

$timeStart = gettimeofday();

for($i = 0; $i < 10000; $i++) {

@fread($fp, 10240);

@rewind($fp);

}

$timeEnd = gettimeofday();

@fclose($fp);

$time = ($timeEnd["usec"]-$timeStart["usec"])/1000000+$timeEnd["sec"]-$timeStart["sec"];

$time = round($time, 3)."秒";

return($time);

}

(责任编辑：最模板)