19个超实用的PHP代码片段

前端技术 2023/09/02 PHP

1) Whois query using PHP ——利用PHP获取Whois请求

利用这段代码，在特定的域名里可获得whois信息。把域名名称作为参数，并显示所有域名的相关信息。

复制代码 代码如下:
function whois_query($domain) { 

    // fix the domain name: 
    $domain = strtolower(trim($domain)); 
    $domain = preg_replace(\'/^http:\\/\\//i\', \'\', $domain); 
    $domain = preg_replace(\'/^www\\./i\', \'\', $domain); 
    $domain = explode(\'/\', $domain); 
    $domain = trim($domain[0]); 

    // split the TLD from domain name 
    $_domain = explode(\'.\', $domain); 
    $lst = count($_domain)-1; 
    $ext = $_domain[$lst]; 

    // You find resources and lists  
    // like these on wikipedia:  
    // 
    // <a href=\"http://de.wikipedia.org/wiki/Whois\">http://de.wikipedia.org/wiki/Whois</a> 
    // 
    $servers = array( 
        \"biz\" => \"whois.neulevel.biz\", 
        \"com\" => \"whois.internic.net\", 
        \"us\" => \"whois.nic.us\", 
        \"coop\" => \"whois.nic.coop\", 
        \"info\" => \"whois.nic.info\", 
        \"name\" => \"whois.nic.name\", 
        \"net\" => \"whois.internic.net\", 
        \"gov\" => \"whois.nic.gov\", 
        \"edu\" => \"whois.internic.net\", 
        \"mil\" => \"rs.internic.net\", 
        \"int\" => \"whois.iana.org\", 
        \"ac\" => \"whois.nic.ac\", 
        \"ae\" => \"whois.uaenic.ae\", 
        \"at\" => \"whois.ripe.net\", 
        \"au\" => \"whois.aunic.net\", 
        \"be\" => \"whois.dns.be\", 
        \"bg\" => \"whois.ripe.net\", 
        \"br\" => \"whois.registro.br\", 
        \"bz\" => \"whois.belizenic.bz\", 
        \"ca\" => \"whois.cira.ca\", 
        \"cc\" => \"whois.nic.cc\", 
        \"ch\" => \"whois.nic.ch\", 
        \"cl\" => \"whois.nic.cl\", 
        \"cn\" => \"whois.cnnic.net.cn\", 
        \"cz\" => \"whois.nic.cz\", 
        \"de\" => \"whois.nic.de\", 
        \"fr\" => \"whois.nic.fr\", 
        \"hu\" => \"whois.nic.hu\", 
        \"ie\" => \"whois.domainregistry.ie\", 
        \"il\" => \"whois.isoc.org.il\", 
        \"in\" => \"whois.ncst.ernet.in\", 
        \"ir\" => \"whois.nic.ir\", 
        \"mc\" => \"whois.ripe.net\", 
        \"to\" => \"whois.tonic.to\", 
        \"tv\" => \"whois.tv\", 
        \"ru\" => \"whois.ripn.net\", 
        \"org\" => \"whois.pir.org\", 
        \"aero\" => \"whois.information.aero\", 
        \"nl\" => \"whois.domain-registry.nl\" 
    ); 

    if (!isset($servers[$ext])){ 
        die(\'Error: No matching nic server found!\'); 
    } 

    $nic_server = $servers[$ext]; 

    $output = \'\'; 

    // connect to whois server: 
    if ($conn = fsockopen ($nic_server, 43)) { 
        fputs($conn, $domain.\"\\r\\n\"); 
        while(!feof($conn)) { 
            $output .= fgets($conn,128); 
        } 
        fclose($conn); 
    } 
    else { die(\'Error: Could not connect to \' . $nic_server . \'!\'); } 

    return $output; 
} 

2) Text messaging with PHP using the TextMagic API ——使用TextMagic API 获取PHP Test信息

TextMagic引入强大的核心API，可轻松将SMS发送到手机。该API是需要付费。

复制代码 代码如下:

the TextMagic PHP lib 
require(\'textmagic-sms-api-php/TextMagicAPI.php\'); 

// Set the username and password information 
$username = \'myusername\'; 
$password = \'mypassword\'; 

// Create a new instance of TM 
$router = new TextMagicAPI(array( 
    \'username\' => $username, 
    \'password\' => $password 
)); 

// Send a text message to \'999-123-4567\' 
$result = $router->send(\'Wake up!\', array(9991234567), true); 

// result:  Result is: Array ( [messages] => Array ( [19896128] => 9991234567 ) [sent_text] => Wake up! [parts_count] => 1 ) 

3) Get info about your memory usage——获取内存使用率

这段代码帮助你获取内存使用率。

复制代码 代码如下:

echo \"Initial: \".memory_get_usage().\" bytes \\n\"; 
/* prints
Initial: 361400 bytes
*/ 

// let\'s use up some memory 
for ($i = 0; $i < 100000; $i++) { 
    $array []= md5($i); 
} 

// let\'s remove half of the array 
for ($i = 0; $i < 100000; $i++) { 
    unset($array[$i]); 
} 

echo \"Final: \".memory_get_usage().\" bytes \\n\"; 
/* prints
Final: 885912 bytes
*/ 

echo \"Peak: \".memory_get_peak_usage().\" bytes \\n\"; 
/* prints
Peak: 13687072 bytes
*/ 

4) Display source code of any webpage——查看任意网页源代码

如果你想查看网页源代码，那么只需更改第二行的URL，源代码就会在网页上显示出。

复制代码 代码如下:
<?php // display source code $lines = file(\'http://google.com/\'); foreach ($lines as $line_num => $line) {  
    // loop thru each line and prepend line numbers 
    echo \"Line #{$line_num} : \" . htmlspecialchars($line) . \" 
\\n\"; 
} 

5) Create data uri\'s——创建数据uri

通过使用此代码，你可以创建数据Uri，这对在HTML/CSS中嵌入图片非常有用，可帮助节省HTTP请求。

复制代码 代码如下:

function data_uri($file, $mime) { 
  $contents=file_get_contents($file); 
  $base64=base64_encode($contents); 
  echo \"data:$mime;base64,$base64\"; 
}

6) Detect location by IP——通过IP检索出地理位置

这段代码帮助你查找特定的IP，只需在功能参数上输入IP，就可检测出位置。

复制代码 代码如下:

function detect_city($ip) { 

        $default = \'UNKNOWN\'; 

        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; } } 

7) Detect browser language——查看浏览器语言

检测浏览器使用的代码脚本语言。

复制代码 代码如下:
function get_client_language($availableLanguages, $default=\'en\'){ 
    if (isset($_SERVER[\'HTTP_ACCEPT_LANGUAGE\'])) { 
        $langs=explode(\',\',$_SERVER[\'HTTP_ACCEPT_LANGUAGE\']); 

        foreach ($langs as $value){ 
            $choice=substr($value,0,2); 
            if(in_array($choice, $availableLanguages)){ 
                return $choice; 
            } 
        } 
    }  
    return $default; 
} 

8) Check if server is HTTPS——检测服务器是否是HTTPS

复制代码 代码如下:
if ($_SERVER[\'HTTPS\'] != \"on\") {  
    echo \"This is not HTTPS\"; 
}else{ 
    echo \"This is HTTPS\"; 
} 

9) Generate CSV file from a PHP array——在PHP数组中生成.csv 文件
复制代码 代码如下:
function generateCsv($data, $delimiter = \',\', $enclosure = \'\"\') { 
   $handle = fopen(\'php://temp\', \'r+\'); 
   foreach ($data as $line) { 
           fputcsv($handle, $line, $delimiter, $enclosure); 
   } 
   rewind($handle); 
   while (!feof($handle)) { 
           $contents .= fread($handle, 8192); 
   } 
   fclose($handle); 
   return $contents; 
} 

10.查找Longitudes与Latitudes之间的距离

复制代码 代码如下:
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: 
复制代码 代码如下:
miles: 2.6025 
feet: 13,741.4350 
yards: 4,580.4783 
kilometers: 4.1884 
meters: 4,188.3894

11.完善cURL功能

复制代码 代码如下:
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; 
    } 
}

12.清理用户输入
复制代码 代码如下:
<?php
function cleanInput($input) {

  $search = array(
    \'@<script[^>]*?>.*?</script>@si\',   // Strip out javascript
    \'@<[\\/\\!]*?[^<>]*?>@si\',            // Strip out HTML tags
    \'@<style[^>]*?>.*?</style>@siU\',    // Strip style tags properly
    \'@<![\\s\\S]*?--[ \\t\\n\\r]*>@\'         // Strip multi-line comments
  );

    $output = preg_replace($search, \'\', $input);
    return $output;
  }
?>
<?php
function sanitize($input) {
    if (is_array($input)) {
        foreach($input as $var=>$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;
}
?>

13.通过IP（城市、国家）检测地理位置
复制代码 代码如下:
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; } } 

14.设置密码强度
复制代码 代码如下:

function password_strength($string){
    $h    = 0;
    $size = strlen($string);
    foreach(count_chars($string, 1) as $v){
        $p = $v / $size;
        $h -= $p * log($p) / log(2);
    }
    $strength = ($h / 4) * 100;
    if($strength > 100){
        $strength = 100;
    }
    return $strength;
}

var_dump(password_strength(\"Correct Horse Battery Staple\"));
echo \"<br>\";
var_dump(password_strength(\"Super Monkey Ball\"));
echo \"<br>\";
var_dump(password_strength(\"Tr0ub4dor&3\"));
echo \"<br>\";
var_dump(password_strength(\"abc123\"));
echo \"<br>\";
var_dump(password_strength(\"sweet\"));

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