直接拿来用 10个PHP代码片段

　　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

　　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 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

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 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。

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

　　英文出自：Codegeekz

　　相关文档：可以直接拿来用的15个jQuery代码片段