十个超级有用的PHP代码片段

歆馨 2012-06-13

展开全文

1. 发送短信

调用 TextMagic API。

01// Include the TextMagic PHP lib
02require('textmagic-sms-api-php/TextMagicAPI.php');
03 
04// Set the username and password information
05$username = 'myusername';
06$password = 'mypassword';
07 
08// Create a new instance of TM
09$router = new TextMagicAPI(array(
10    'username' => $username,
11    'password' => $password
12));
13 
14// Send a text message to '999-123-4567'
15$result = $router->send('Wake up!', array(9991234567), true);
16 
17//
 result:  Result is: Array ( [messages] => Array ( [19896128] => 
9991234567 ) [sent_text] => Wake up! [parts_count] => 1 )

2. 根据IP查找地址

01function detect_city($ip) {
02 
03        $default = 'UNKNOWN';
04 
05        if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost')
06            $ip = '8.8.8.8';
07 
08        $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)';
09 
10        $url = 'http:///ip_locator.php?ip=' . urlencode($ip);
11        $ch = curl_init();
12 
13        $curl_opt = array(
14            CURLOPT_FOLLOWLOCATION  => 1,
15            CURLOPT_HEADER      => 0,
16            CURLOPT_RETURNTRANSFER  => 1,
17            CURLOPT_USERAGENT   => $curlopt_useragent,
18            CURLOPT_URL       => $url,
19            CURLOPT_TIMEOUT         => 1,
20            CURLOPT_REFERER         => 'http://' . $_SERVER['HTTP_HOST'],
21        );
22 
23        curl_setopt_array($ch, $curl_opt);
24 
25        $content = curl_exec($ch);
26 
27        if (!is_null($curl_info)) {
28            $curl_info = curl_getinfo($ch);
29        }
30 
31        curl_close($ch);
32 
33        if ( preg_match('{<li>City : ([^<]*)</li>}i', $content, $regs) )  {
34            $city = $regs[1];
35        }
36        if ( preg_match('{<li>State/Province : ([^<]*)</li>}i', $content, $regs) )  {
37            $state = $regs[1];
38        }
39 
40        if( $city!='' && $state!='' ){
41          $location = $city . ', ' . $state;
42          return $location;
43        }else{
44          return $default;
45        }
46 
47    }

3. 显示网页的源代码

1<?php // display source code
2$lines = file('http://google.com/');
3foreach ($lines as $line_num => $line) {
4    // loop thru each line and prepend line numbers
5    echo "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br>\n";
6}

4. 检查服务器是否使用HTTPS

1if ($_SERVER['HTTPS'] != "on") {
2    echo "This is not HTTPS";
3}else{
4    echo "This is HTTPS";
5}

5. 显示Facebook粉丝数量

1function fb_fan_count($facebook_name){
2    // Example: https://graph./digimantra
3    $data = json_decode(file_get_contents("https://graph./".$facebook_name));
4    echo $data->likes;
5}

6. 检测图片的主要颜色

01$i = imagecreatefromjpeg("image.jpg");
02 
03for ($x=0;$x<imagesx($i);$x++) {
04    for ($y=0;$y<imagesy($i);$y++) {
05        $rgb = imagecolorat($i,$x,$y);
06        $r   = ($rgb >> 16) & 0xFF;
07        $g   = ($rgb >>  & 0xFF;
08        $b   = $rgb & 0xFF;
09 
10        $rTotal += $r;
11        $gTotal += $g;
12        $bTotal += $b;
13        $total++;
14    }
15}
16 
17$rAverage = round($rTotal/$total);
18$gAverage = round($gTotal/$total);
19$bAverage = round($bTotal/$total);

7. 获取内存使用信息

01echo "Initial: ".memory_get_usage()." bytes \n";
02/* prints
03Initial: 361400 bytes
04*/
05 
06// let's use up some memory
07for ($i = 0; $i < 100000; $i++) {
08    $array []= md5($i);
09}
10 
11// let's remove half of the array
12for ($i = 0; $i < 100000; $i++) {
13    unset($array[$i]);
14}
15 
16echo "Final: ".memory_get_usage()." bytes \n";
17/* prints
18Final: 885912 bytes
19*/
20 
21echo "Peak: ".memory_get_peak_usage()." bytes \n";
22/* prints
23Peak: 13687072 bytes
24*/

8. 使用 gzcompress() 压缩数据

01$string =
02"Lorem ipsum dolor sit amet, consectetur
03adipiscing elit. Nunc ut elit id mi ultricies
04adipiscing. Nulla facilisi. Praesent pulvinar,
05sapien vel feugiat vestibulum, nulla dui pretium orci,
06non ultricies elit lacus quis ante. Lorem ipsum dolor
07sit amet, consectetur adipiscing elit. Aliquam
08pretium ullamcorper urna quis iaculis. Etiam ac massa
09sed turpis tempor luctus. Curabitur sed nibh eu elit
10mollis congue. Praesent ipsum diam, consectetur vitae
11ornare a, aliquam a nunc. In id magna pellentesque
12tellus posuere adipiscing. Sed non mi metus, at lacinia
13augue. Sed magna nisi, ornare in mollis in, mollis
14sed nunc. Etiam at justo in leo congue mollis.
15Nullam in neque eget metus hendrerit scelerisque
16eu non enim. Ut malesuada lacus eu nulla bibendum
17id euismod urna sodales. ";
18 
19$compressed = gzcompress($string);
20 
21echo "Original size: ". strlen($string)."\n";
22/* prints
23Original size: 800
24*/
25 
26echo "Compressed size: ". strlen($compressed)."\n";
27/* prints
28Compressed size: 418
29*/
30 
31// getting it back
32$original = gzuncompress($compressed);

9. 使用PHP做Whois检查

01function whois_query($domain) {
02 
03    // fix the domain name:
04    $domain = strtolower(trim($domain));
05    $domain = preg_replace('/^http:\/\//i', '', $domain);
06    $domain = preg_replace('/^www\./i', '', $domain);
07    $domain = explode('/', $domain);
08    $domain = trim($domain[0]);
09 
10    // split the TLD from domain name
11    $_domain = explode('.', $domain);
12    $lst = count($_domain)-1;
13    $ext = $_domain[$lst];
14 
15    // You find resources and lists
16    // like these on wikipedia:
17    //
18    // http://de./wiki/Whois
19    //
20    $servers = array(
21        "biz" => "whois.neulevel.biz",
22        "com" => "whois.internic.net",
23        "us" => "whois.nic.us",
24        "coop" => "whois.nic.coop",
25        "info" => "whois.nic.info",
26        "name" => "whois.nic.name",
27        "net" => "whois.internic.net",
28        "gov" => "whois.nic.gov",
29        "edu" => "whois.internic.net",
30        "mil" => "rs.internic.net",
31        "int" => "whois.iana.org",
32        "ac" => "whois.nic.ac",
33        "ae" => "whois.uaenic.ae",
34        "at" => "whois.ripe.net",
35        "au" => "whois.aunic.net",
36        "be" => "whois.dns.be",
37        "bg" => "whois.ripe.net",
38        "br" => "whois.registro.br",
39        "bz" => "whois.belizenic.bz",
40        "ca" => "whois.cira.ca",
41        "cc" => "whois.nic.cc",
42        "ch" => "whois.nic.ch",
43        "cl" => "whois.nic.cl",
44        "cn" => "whois.cnnic.net.cn",
45        "cz" => "whois.nic.cz",
46        "de" => "whois.nic.de",
47        "fr" => "whois.nic.fr",
48        "hu" => "whois.nic.hu",
49        "ie" => "whois.domainregistry.ie",
50        "il" => "whois.isoc.org.il",
51        "in" => "whois.ncst.ernet.in",
52        "ir" => "whois.nic.ir",
53        "mc" => "whois.ripe.net",
54        "to" => "whois.tonic.to",
55        "tv" => "whois.tv",
56        "ru" => "whois.ripn.net",
57        "org" => "whois.pir.org",
58        "aero" => "whois.information.aero",
59        "nl" => "whois.domain-registry.nl"
60    );
61 
62    if (!isset($servers[$ext])){
63        die('Error: No matching nic server found!');
64    }
65 
66    $nic_server = $servers[$ext];
67 
68    $output = '';
69 
70    // connect to whois server:
71    if ($conn = fsockopen ($nic_server, 43)) {
72        fputs($conn, $domain."\r\n");
73        while(!feof($conn)) {
74            $output .= fgets($conn,128);
75        }
76        fclose($conn);
77    }
78    else { die('Error: Could not connect to ' . $nic_server . '!'); }
79 
80    return $output;
81}

10. 通过Email发送PHP错误

01<?php
02 
03// Our custom error handler
04function nettuts_error_handler($number, $message, $file, $line, $vars){
05    $email = "
06        <p>An error ($number) occurred on line
07        <strong>$line</strong> and in the <strong>file: $file.</strong>
08        <p> $message </p>";
09 
10    $email .= "<pre>" . print_r($vars, 1) . "</pre>";
11 
12    $headers = 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
13 
14    // Email the error to someone...
15    error_log($email, 1, 'you@youremail.com', $headers);
16 
17    // Make sure that you decide how to respond to errors (on the user's side)
18    // Either echo an error message, or kill the entire project. Up to you...
19    // The code below ensures that we only "die" if the error was more than
20    // just a NOTICE.
21    if ( ($number !== E_NOTICE) && ($number < 2048) ) {
22        die("There was an error. Please try again later.");
23    }
24}
25 
26// We should use our custom function to handle errors.
27set_error_handler('nettuts_error_handler');
28 
29// Trigger an error... (var doesn't exist)
30echo $somevarthatdoesnotexist;

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