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: 2.6025
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 => $message){
echo "<div class='tweet'>".$twitter->formattweet($message)."<br />at: ".$time."</div>";
}