首页手记 10个实用的PHP代码片段推荐

10个实用的PHP代码片段推荐

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PHP

当我们使用PHP的时候，如果你自己有些非常有用的方法或者代码片段，那么将会给你带来极大的便利。今天我们将介绍10个超级好用的PHP代码片段，希望大家能够喜欢！

使用textmagic API来发送消息

可能有的时候，你需要发送一些短信到你客户手机上，你绝对应该看看textMagic。他们提供非常简单的API来实现这个功能。但是不是免费的哦。

// Include 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 )

来源: http://davidwalsh.name/php-text-messaging

通过IP来判断来源

这是一个非常实用的代码片段帮助你通过IP来判断地点。下面的方法接受一个参数，然后返回IP所在地点。如果没有找到，则返回UNKNOWN。

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('{<li>City : ([^<]*)</li>}i', $content, $regs) )  {
            $city = $regs[1];
        }
        if ( preg_match('{<li>State/Province : ([^<]*)</li>}i', $content, $regs) )  {
            $state = $regs[1];
        }

        if( $city!='' && $state!='' ){
          $location = $city . ', ' . $state;
          return $location;
        }else{
          return $default;
        }
}

显示任何网页的源代码

是不是想显示带有行号的任何网页的源代码？这里有个简单的代码片段。只要修改第二行的url即可

<?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 #<b>{$line_num}</b> : " . htmlspecialchars($line) . "\n";
}

判断服务器是否HTTPS

需要判断代码运行环境是否HTTPS服务器？下面代码可以帮助你实现，非常简单！

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

来源: http://snipplr.com/view/62373/check-if-url-is-https-in-php/

在完整的文本中显示Facebook的粉丝

想看看你在facebook有多少粉丝么？下面代码可以帮助你实现

unction fb_fan_count($facebook_name){

// Example: https://graph.facebook.com/digimantra
    $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name));
    echo $data->likes;
}

判断一个图片的主色调

下面这个代码非常实用，能帮助你判断一个图片中的主色调，你可以分析任何图片。

$i = imagecreatefromjpeg("image.jpg");

for ($x=0;$x<imagesx($i);$x++) {
    for ($y=0;$y<imagesy($i);$y++) {
        $rgb = imagecolorat($i,$x,$y);
        $r   = ($rgb >> 16) & 0xFF;
        $g   = ($rgb >>  & 0xFF;
        $b   = $rgb & 0xFF;

        $rTotal += $r;
        $gTotal += $g;
        $bTotal += $b;
        $total++;
    }
}

$rAverage = round($rTotal/$total);
$gAverage = round($gTotal/$total);
$bAverage = round($bTotal/$total);

来源: http://forums.devnetwork.net/viewtopic.php?t=39594

了解你的内存使用情况

为了优化你的脚本，你肯定需要知道你的服务器上的RAM使用数量。这个代码片段将帮助你了解内存使用，并且打印初始，最终，及其峰值使用情况

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
*/

来源: http://net.tutsplus.com/tutorials/php/9-useful-php…

使用gzcompress()来压缩数据

当使用string时，往往会非常的长。使用gzcompress()方法，strings可以被压缩，解压缩使用gzuncompress()即可，如下：

$string =
"Lorem ipsum dolor sit amet, consectetur
adipiscing elit. Nunc ut elit id mi ultricies
adipiscing. Nulla facilisi. Praesent pulvinar,
sapien vel feugiat vestibulum, nulla dui pretium orci,
non ultricies elit lacus quis ante. Lorem ipsum dolor
sit amet, consectetur adipiscing elit. Aliquam
pretium ullamcorper urna quis iaculis. Etiam ac massa
sed turpis tempor luctus. Curabitur sed nibh eu elit
mollis congue. Praesent ipsum diam, consectetur vitae
ornare a, aliquam a nunc. In id magna pellentesque
tellus posuere adipiscing. Sed non mi metus, at lacinia
augue. Sed magna nisi, ornare in mollis in, mollis
sed nunc. Etiam at justo in leo congue mollis.
Nullam in neque eget metus hendrerit scelerisque
eu non enim. Ut malesuada lacus eu nulla bibendum
id euismod urna sodales. ";

$compressed = gzcompress($string);

echo "Original size: ". strlen($string)."\n";
/* prints
Original size: 800
*/

echo "Compressed size: ". strlen($compressed)."\n";
/* prints
Compressed size: 418
*/

// getting it back
$original = gzuncompress($compressed);

来源: http://net.tutsplus.com/tutorials/php/9-useful-php…

使用PHP来执行Whois查询

如果你需要得到指定域名的whois信息，为什么不使用PHP呢？下面方法可以帮助大家：

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:

//

// http://de.wikipedia.org/wiki/Whois

//
    $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;
}

来源: http://www.jonasjohn.de/snippets/php/whois-query.htm

不显示PHP错误而发送电子邮件取代之

有些时候你不想显示PHP错误，而给你发送一个email，下面代码可以帮助你实现：

&lt;?php

// Our custom error handler
function nettuts_error_handler($number, $message, $file, $line, $vars){
    $email = "
        &lt;p&gt;An error ($number) occurred on line
        &lt;strong&gt;$line&lt;/strong&gt; and in the &lt;strong&gt;file: $file.&lt;/strong&gt;
        &lt;p&gt; $message &lt;/p&gt;";

    $email .= "&lt;pre&gt;" . print_r($vars, 1) . "&lt;/pre&gt;";

    $headers = 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

// Email the error to someone...
    error_log($email, 1, 'you@youremail.com', $headers);

// Make sure that you decide how to respond to errors (on the user's side)

// Either echo an error message, or kill the entire project. Up to you...

// The code below ensures that we only "die" if the error was more than

// just a NOTICE.
    if ( ($number !== E_NOTICE) &amp;&amp; ($number &lt; 2048) ) {
        die("There was an error. Please try again later.");
    }
}

// We should use our custom function to handle errors.
set_error_handler('nettuts_error_handler');

// Trigger an error... (var doesn't exist)
echo $somevarthatdoesnotexist;

英文原文：10 super useful PHP snippets you probably haven’t seen
译文转自：http://www.csdn.net/article/2012-01-19/310993

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