php 取整函数(floor,ceil,round,intval)

echo floor(4.3); // 4
echo floor(9.999); // 9

echo round(3.4); // 3
echo round(3.5); // 4
echo round(3.6); // 4
echo round(3.6, 0); // 4
echo round(1.95583, 2); // 1.96
echo round(1241757, -3); // 1242000

<?php

echo intval(4.3);    //4

echo intval(4.6);  // 4  

?>

$agent = strtolower($_SERVER['HTTP_USER_AGENT']); 
if(strpos($agent,"netfront") || strpos($agent,"iphone") || strpos($agent,"midp-2.0") || strpos($agent,"opera mini") || strpos($agent,"ucweb") || strpos($agent,"android") || strpos($agent,"windows ce") || strpos($agent,"symbianos")) {
    Header("HTTP/1.1 301 Moved Permanently");
    header("Location:####");  die;
}

function isMobile() {
    if(isset($_SERVER['HTTP_X_WAP_PROFILE'])) {
        return true;
    }
    if(isset ($_SERVER['HTTP_VIA'])) {
        //找不到为flase,否则为true
        return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
    }
    if(isset($_SERVER['HTTP_USER_AGENT'])) {
        //此数组有待完善
        $clientkeywords = array (
        'nokia',
        'sony',
        'ericsson',
        'mot',
        'samsung',
        'htc',
        'sgh',
        'lg',
        'sharp',
        'sie-',
        'philips',
        'panasonic',
        'alcatel',
        'lenovo',
        'iphone',
        'ipod',
        'blackberry',
        'meizu',
        'android',
        'netfront',
        'symbian',
        'ucweb',
        'windowsce',
        'palm',
        'operamini',
        'operamobi',
        'openwave',
        'nexusone',
        'cldc',
        'midp',
        'wap',
        'mobile'
        );
        // 从HTTP_USER_AGENT中查找手机浏览器的关键字
        if(preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))) {
            return true;
        }
 
    }
 
    //协议法，因为有可能不准确，放到最后判断
    if (isset ($_SERVER['HTTP_ACCEPT'])) {
        // 如果只支持wml并且不支持html那一定是移动设备
        // 如果支持wml和html但是wml在html之前则是移动设备
        if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html')))) {
            return true;
        }
    }
     
return false;
}

function http_request($url,$timeout=30,$header=array()){
        if (!function_exists('curl_init')) {
            throw new Exception('server not install curl');
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        if (!empty($header)) {
            curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
        }
        $data = curl_exec($ch);
        list($header, $data) = explode("rnrn", $data);
        $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        if ($http_code == 301 || $http_code == 302) {
            $matches = array();
            preg_match('/Location:(.*?)n/', $header, $matches);
            $url = trim(array_pop($matches));
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_HEADER, false);
            $data = curl_exec($ch);
        }

        if ($data == false) {
            curl_close($ch);
        }
        @curl_close($ch);
        return $data;
}

function shorturl($input) {

  $base32 = array (

    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',

    'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p',

    'q', 'r', 's', 't', 'u', 'v', 'w', 'x',

    'y', 'z', '0', '1', '2', '3', '4', '5'

    );

  $hex = md5($input);

  $hexLen = strlen($hex);

  $subHexLen = $hexLen / 8;

  $output = array();

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

    $subHex = substr ($hex, $i * 8, 8);

    $int = 0x3FFFFFFF & (1 * ('0x'.$subHex));

    $out = '';

    for ($j = 0; $j < 6; $j++) {

      $val = 0x0000001F & $int;

      $out .= $base32[$val];

      $int = $int >> 5;

    }

    $output[] = $out;

  }

  return $output;

}

Sample code to test/use the above function:

$input = 'http://www.111cn.net /1';

$output = shorturl($input);

echo "Input  : $inputn";

echo "Output : {$output[0]}n";

echo "         {$output[1]}n";

echo "         {$output[2]}n";

echo "         {$output[3]}n";

echo "n";

$input = 'http://www.111cn.net /2';

$output = shorturl($input);

echo "Input  : $inputn";

echo "Output : {$output[0]}n";

echo "         {$output[1]}n";

echo "         {$output[2]}n";

echo "         {$output[3]}n";

echo "n";

Output:

Input : http://www.111cn.net /1

Output : h0xg4r

bdr3tw

osk2d3

4azfqa

Input : http://www.111cn.net /2

Output : tm5kxb

ceoj2s

yw3dvl

nrmrxl