10 个实用的PHP代码片段

jopen 6年前

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;       }   }