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10个PHP代码片段

11

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1.查找Longitudes与Latitudes之间的距离

functiongetDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) {
    $theta = $longitude1 - $longitude2;
    $miles = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));
    $miles = acos($miles);
    $miles = rad2deg($miles);
    $miles = $miles * 60 * 1.1515;
    $feet = $miles * 5280;
    $yards = $feet / 3;
    $kilometers = $miles * 1.609344;
    $meters = $kilometers * 1000;
    returncompact('miles','feet','yards','kilometers','meters');
}
$point1 = array('lat'=> 40.770623,'long'=> -73.964367);
$point2 = array('lat'=> 40.758224,'long'=> -73.917404);
$distance = getDistanceBetweenPointsNew($point1['lat'], $point1['long'], $point2['lat'], $point2['long']);
foreach ($distance as $unit => $value) {
    echo $unit.': '.number_format($value,4).'
';
}
The example returns the following:
miles: 2.6025
feet: 13,741.4350
yards: 4,580.4783
kilometers: 4.1884
meters: 4,188.3894
2.完善cURL功能

 

function xcurl($url,$ref=null,$post=array(),$ua="Mozilla/5.0 (X11; Linux x86_64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre",$print=false) {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_AUTOREFERER, true);
    if(!empty($ref)) {
        curl_setopt($ch, CURLOPT_REFERER, $ref);
    }
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    if(!empty($ua)) {
        curl_setopt($ch, CURLOPT_USERAGENT, $ua);
    }
    if(count($post) > 0){
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $post);   
    }
    $output = curl_exec($ch);
    curl_close($ch);
    if($print) {
        print($output);
    } else {
        return $output;
    }
}
3.清理用户输入
]*?>.*?@si',   // Strip out javascript
    '@<[\/\!]*?[^<>]*?>@si',            // Strip out HTML tags
    '@]*?>.*?@siU',    // Strip style tags properly
    '@@'         // Strip multi-line comments
  );
    $output = preg_replace($search, '', $input);
    return $output;
  }
?>
$val) {
            $output[$var] = sanitize($val);
        }
    }
    else {
        if (get_magic_quotes_gpc()) {
            $input = stripslashes($input);
        }
        $input  = cleanInput($input);
        $output = mysql_real_escape_string($input);
    }
    return $output;
}
?>
4.通过IP(城市、国家)检测地理位置

function detect_city($ip) {

 

$default = ‘Hollywood, CA';

 

if (!is_string($ip) || strlen($ip) < 1 || $ip == ‘127.0.0.1’ || $ip == ‘localhost’)

$ip = ‘8.8.8.8’;

 

$curlopt_useragent = ‘Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)';

 

$url = ‘http://ipinfodb.com/ip_locator.php?ip=’ . urlencode($ip);

$ch = curl_init();

 

$curl_opt = array(

CURLOPT_FOLLOWLOCATION  => 1,

CURLOPT_HEADER      => 0,

CURLOPT_RETURNTRANSFER  => 1,

CURLOPT_USERAGENT   => $curlopt_useragent,

CURLOPT_URL       => $url,

CURLOPT_TIMEOUT         => 1,

CURLOPT_REFERER         => ‘http://’ . $_SERVER[‘HTTP_HOST’],

);

 

curl_setopt_array($ch, $curl_opt);

 

$content = curl_exec($ch);

 

if (!is_null($curl_info)) {

$curl_info = curl_getinfo($ch);

}

 

curl_close($ch);

 

if ( preg_match(‘{<li>City : ([^<]*)</li>}i’, $content, $regs) )  {

$city = $regs[1];

}

if ( preg_match(‘{<li>State/Province : ([^<]*)</li>}i’, $content, $regs) )  {

$state = $regs[1];

}

 

if( $city!=” && $state!=” ){

$location = $city . ‘, ‘ . $state;

return $location;

}else{

return $default;

}

 

}

5.设置密码强度

 <?php
/**
*
* @param String $string
* @return float
*
* Returns a float between 0 and 100. The closer the number is to 100 the
* the stronger password is; further from 100 the weaker the password is.
*/
function password_strength($string){
$h    = 0;
$size = strlen($string);
foreach(count_chars($string, 1) as $v){
$p = $v / $size;
$h -= $p * log($p) / log(2);
}
$strength = ($h / 4) * 100;
if($strength > 100){
$strength = 100;
}
return $strength;
}
var_dump(password_strength(“Correct Horse Battery Staple”));
echo “<br>”;
var_dump(password_strength(“Super Monkey Ball”));
echo “<br>”;
var_dump(password_strength(“Tr0ub4dor&3″));
echo “<br>”;
var_dump(password_strength(“abc123″));
echo “<br>”;
var_dump(password_strength(“sweet”));

6.检测浏览器语言,只提供可用的$availableLanguages作为数组(‘en’, ‘de’, ‘es’)
function get_client_language($availableLanguages, $default='en'){
    
    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
            
        $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
        //start going through each one
        foreach ($langs as $value){
    
            $choice=substr($value,0,2);
            if(in_array($choice, $availableLanguages)){
                return $choice;
                
            }
            
        }
    }
    return $default;
}
7.创建数据URL
function data_uri($file, $mime) {
  $contents=file_get_contents($file);
  $base64=base64_encode($contents);
  echo "data:$mime;base64,$base64";
}
8.创建更加友好的页面标题SEO URL
输入示例:
$title = “This foo’s bar is rockin’ cool!”; echo makeseoname($title); //RETURNS: //this-foos-bar-is-rockin-cool
function make_seo_name($title) {
    return preg_replace('/[^a-z0-9_-]/i', '', strtolower(str_replace(' ', '-', trim($title))));
}
9.终极加密功能
// f(ucking) u(ncrackable) e(ncryption) function by BlackHatDBL (www.netforme.net)
function fue($hash,$times) {
    // Execute the encryption(s) as many times as the user wants
    for($i=$times;$i>0;$i--) {
        // Encode with base64...
        $hash=base64_encode($hash);
        // and md5...
        $hash=md5($hash);
        // sha1...
        $hash=sha1($hash);
        // sha256... (one more)
        $hash=hash("sha256", $hash);
        // sha512
        $hash=hash("sha512", $hash);
    }
    // Finaly, when done, return the value
    return $hash;
}
10a.Tweeter Feed Runner——使用任意twitter名,可在任意页面上加载用户资源。
 <?php
class Twitter{
protected $twitURL = 'http://api.twitter.com/1/';
protected $xml;
protected $tweets  = array(), $twitterArr = array();
protected $pversion = "1.0.0";
public function pversion(){
return $this->pversion;
}
public function loadTimeline($user, $max = 20){
$this->twitURL .= 'statuses/user_timeline.xml?screen_name='.$user.'&count='.$max;
$ch        = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->twitURL);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$this->xml = curl_exec($ch);
return $this;
}
public function getTweets(){
$this->twitterArr = $this->getTimelineArray();
$tweets = array();
foreach($this->twitterArr->status as $status){
$tweets[$status->created_at->__toString()] = $status->text->__toString();
}
return $tweets;
}
public function getTimelineArray(){
return simplexml_load_string($this->xml);
}
public function formatTweet($tweet){
$tweet = preg_replace("/(http(.+?))( |$)/","<a href=\"$0\">$1</a>$3", $tweet);
$tweet = preg_replace("/#(.+?)(\h|\W|$)/", "<a href=\"https://twitter.com/i/#!/search/?q=%23$1&src=hash\">#$1</a>$2", $tweet);
$tweet = preg_replace("/@(.+?)(\h|\W|$)/", "<a href=\"http://twitter.com/#!/$1\">@$1</a>$2", $tweet);
return $tweet;
}
}
10b. Tweeter Feed Runner——用于在主题中创建文件,比如:example.php
loadTimeline("phpsnips")->getTweets();
foreach($feed as $time => $message){
    echo "<div class='tweet'>".$twitter->formatTweet($message)."<br />At: ".$time."</div>";
}
时间:2013-08-15
分类:PHP , 编程语言

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