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。

直接拿来用，10个PHP代码片段_php

1.查找Longitudes与Latitudes之间的距离

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functiongetDistanceBetweenPointsNew($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;
returncompact('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
源码

2.完善cURL功能

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functionxcurl($url,$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

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]*?>.*?@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

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functiondetect_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

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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’)

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functionget_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;
}
源码

7.创建数据URL

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functiondata_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

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functionmake_seo_name($title) {
returnpreg_replace('/[^a-z0-9_-]/i', '', strtolower(str_replace(' ', '-', trim($title))));
}
源码

9.终极加密功能

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// f(ucking) u(ncrackable) e(ncryption) function by BlackHatDBL (www.netforme.net)
functionfue($hash,$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;
}
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。

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pversion;
}
public functionloadTimeline($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 functiongetTweets(){
$this->twitterArr = $this->getTimelineArray();
$tweets = array();
foreach($this->twitterArr->status as $status){
$tweets[$status->created_at->__toString()] = $status->text->__toString();
}
return$tweets;
}
public functiongetTimelineArray(){
returnsimplexml_load_string($this->xml);
}
public functionformatTweet($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

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loadTimeline("phpsnips")->getTweets();
foreach($feed as $time => $message){
echo "<div class='tweet'>".$twitter->formatTweet($message)."<br />At: ".$time."</div>";
}

源码

转载自：http://www.csdn.net/article/2013-07-23/2816316-10-php-snippets-for-developers