10个经常用的php片段

发表时间：2015-05-27来源：网络

1.查找Longitudes与Latitudes之间的距离

12345678910111213141516171819202122232425262728 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: 2.6025feet: 13,741.4350yards: 4,580.4783kilometers: 4.1884meters: 4,188.3894

2.完善cURL功能

12345678910111213141516171819202122232425 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

123456789101112131415161718192021222324 ]*?>.*?@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

1234567891011121314151617181920212223242526272829303132 function detect_city($ip) { $default = 'Hollywood, CA'; if (!is_string($ip) || strlen($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

12345678910111213141516171819 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’)

12345678910111213141516171819 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

12345 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

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

9.终极加密功能

12345678910111213141516171819 // 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。

12345678910111213141516171819202122232425262728 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; }}