PHP是一种HTML内嵌式的语言，是一种在服务器端执行的嵌入HTML文档的脚本语言。PHP拥有数以百计的基本功能，支持上千种扩展。这些功能都被很好的加载在PHP站点上，但内置的库有各种各样的命名。在PHP代码库中包含了无数个有用的PHP代码片段，每位开发者都需要不断完善自己的“工具箱”。有了这些代码片段可以为你节省大量的时间，一起来看下。
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: 2.6025feet: 13,741.4350yards: 4,580.4783kilometers: 4.1884meters: 4,188.3894源码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;}}源码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 $output;}?>源码4.通过IP（城市、国家）检测地理位置
function detect_city($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; } }源码5.设置密码强度
100){ $strength = 100; } return $strength; } var_dump(password_strength("Correct Horse Battery Staple")); echo ""; var_dump(password_strength("Super Monkey Ball")); echo ""; var_dump(password_strength("Tr0ub4dor&3")); echo ""; var_dump(password_strength("abc123")); echo ""; var_dump(password_strength("sweet"));源码6.检测浏览器语言，只提供可用的$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 oneforeach ($langs as $value){$choice=substr($value,0,2);if(in_array($choice, $availableLanguages)){return $choice;}}} return $default;}源码7.创建数据URL
function data_uri($file, $mime) { $contents=file_get_contents($file); $base64=base64_encode($contents); echo "data:$mime;base64,$base64";}源码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))));}源码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 wantsfor($i=$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 valuereturn $hash;}源码10a.Tweeter Feed Runner——使用任意twitter名，可在任意页面上加载用户资源。
pversion; } public function loadTimeline($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 => $message){ echo "<div class='tweet'>".$twitter->formatTweet($message)."<br />At: ".$time."</div>"; }源码
