分享有用的PHP代码片段

这篇文章主要介绍"分享有用的PHP代码片段"，在日常操作中，相信很多人在分享有用的PHP代码片段问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"分享有用的PHP代码片段"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

1.查找Longitudes与Latitudes之间的距离

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

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('{   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; } }

5.设置密码强度

 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"));

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。

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){  $tweet = preg_replace("/(http(.+?))( |$)/","$1$3", $tweet);  $tweet = preg_replace("/#(.+?)(\h|\W|$)/", "#$1$2", $tweet);  $tweet = preg_replace("/@(.+?)(\h|\W|$)/", "@$1$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 => $message){  echo "
".$twitter->formatTweet($message)."
At: ".$time."
"; }

到此，关于"分享有用的PHP代码片段"的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注网站，小编会继续努力为大家带来更多实用的文章！