10 個實用的PHP代碼片段

1. Perfect cURL Function

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;
    }
}

2. Find Distance Between Two Longitudes, Latitudes

function getDistanceBetweenPointsNew($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;
    return compact('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

  3. Detect Location by IP (City, State)

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('{

• City : ([^<]*)

}i', $content, $regs) ) { $city = $regs[1]; } if ( preg_match('{

• State/Province : ([^<]*)

 

}i', $content, $regs) ) { $state = $regs[1]; } if( $city!='' && $state!='' ){ $location = $city . ', ' . $state; return $location; }else{ return $default; } }

  4. PHP Functions to Clean User Input

]*?>.*?@si',   // Strip out javascript
    '@<[\/\!]*?[^<>]*?>@si',            // Strip out HTML tags
    '@<style[^>]*?>.*?@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;
}
?>

  5. Detect Browser Language

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;
}

  6. Password Strength

 100){ 

        $strength = 100; 
    } 
    return $strength; 
} 

var_dump(password_strength("Correct Horse Battery Staple")); 
echo "
"; 
var_dump(password_strength("Super Monkey Ball")); 
echo "
"; 
var_dump(password_strength("Tr0ub4dor&3")); 
echo "
"; 
var_dump(password_strength("abc123")); 
echo "
"; 
var_dump(password_strength("sweet"));

  7. Make page titles seo-friendly for URL

function make_seo_name($title) {
    return preg_replace('/[^a-z0-9_-]/i', '', strtolower(str_replace(' ', '-', trim($title))));
}

8. Create Data URI’S

function data_uri($file, $mime) {
  $contents=file_get_contents($file);
  $base64=base64_encode($contents);
  echo "data:$mime;base64,$base64";
}

  9. Ultimate Encryption Function

// 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;
}

  10. Tweeter Feed Runner

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->推terArr = $this->getTimelineArray(); 
        $tweets = array(); 
        foreach($this->推terArr->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){ 
        $tweet = preg_replace("/(http(.+?))( |$)/","$1$3", $tweet); 
        $tweet = preg_replace("/#(.+?)(\h|\W|$)/", "#$1$2", $tweet); 
        $tweet = preg_replace("/@(.+?)(\h|\W|$)/", "@$1$2", $tweet); 
        return $tweet; 
    } 
}