php常用的十个代码片段，转载-白红宇

php常用的十个代码片段，转载

阅读量：5991 次

发布时间：2019-06-20

本文共 6653 字，大约阅读时间需要 22 分钟。

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

]*?>.*? ', // Strip out javascript

'@<[\/\!]*?[^<>]*?> ', // Strip out HTML tags

'@]*?>.*? ', // 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)'; $url = ' ' . urlencode($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 => ' ' . $_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>"; 
                 } 