当使用PHP进行开发的时候，如果你自己收 藏 了一些非常有用的方法或者代码片段，那么将会给你的开发工作带来极大的便利。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！
1. 使用textmagic API发送消息
可能有的时候，你需要发送一些短信给你的客户，那么你绝对应该看看textMagic。它提供了非常简单的API来实现这个功能。但是不是免费的。
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// 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 )
2. 通过IP判断来源
这是一个非常实用的代码片段，可以帮助你通过IP来判断访客来源。下面的方法通过接收一个参数，然后返回IP所在地点。如果没有找到，则返回UNKNOWN。
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function detect_city( $ip ) {
$default = 'UNKNOWN' ;
if (! is_string ( $ip ) || strlen ( $ip )
$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 = $regs [1];
}
if ( preg_match( '{
$state = $regs [1];
}
if ( $city != '' && $state != '' ){
$location = $city . ', ' . $state ;
return $location ;
} else {
return $default ;
}
}
3. 显示任何网页的源代码
是不是想显示带有行号的任何网页的源代码？这里有个简单的代码片段，你只需要修改第二行的url即可。
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$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" ;
}
4. 判断服务器是否是HTTPS连接
需要判断代码运行环境是否是HTTPS服务器？下面的代码可以帮助你实现，非常简单！
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if ( $_SERVER [ 'HTTPS' ] != "on" ) {
echo "This is not HTTPS" ;
} else {
echo "This is HTTPS" ;
}
5. 在文本中显示Facebook 粉丝数
想看看你在facebook有多少粉丝么？下面代码可以帮助你实现。
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function fb_fan_count( $facebook_name ){
// Example: https://graph.facebook.com/digimantra
$data = json_decode( file_get_contents ( " https://graph.facebook.com/" . $facebook_name ));
echo $data ->likes;
}
6. 判断一张图片的主色调
下面这个代码非常实用，能帮助你判断一张图片中的主色调，你可以分析任何图片。
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$i = imagecreatefromjpeg( "image.jpg" );
for ( $x =0; $x for ( $y =0; $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 );
7. 了解你的内存使用情况
为了优化你的脚本，你需要了解服务器上的RAM使用情况。这个代码片段将帮助你了解内存使用，并且打印初始、最终以及峰值使用情况。
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echo "Initial: " .memory_get_usage(). " bytes \n" ;
/* prints
Initial: 361400 bytes
*/
// let's use up some memory
for ( $i = 0; $i
$array []= md5( $i );
}
// let's remove half of the array
for ( $i = 0; $i
unset( $array [ $i ]);
}
echo "Final: " .memory_get_usage(). " bytes \n" ;
/* prints
Final: 885912 bytes
*/
echo "Peak: " .memory_get_peak_usage(). " bytes \n" ;
/* prints
Peak: 13687072 bytes
*/
8. 使用gzcompress()压缩数据
当使用很长的string时，可以通过gzcompress()方法，将strings压缩。解压缩使用gzuncompress()即可。代码如下。
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$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 );
9. 使用PHP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？下面的代码可以帮助大家。
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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 ;
}
10. 不显示PHP错误而发送电子邮件取代之
如果你不想在页面中显示PHP错误，也可以通过email来获取错误信息。下面的代码可以帮助你实现。
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// Our custom error handler
function nettuts_error_handler( $number , $message , $file , $line , $vars ){
$email = "
An error ( $number ) occurred on line
$line and in the file: $file .
$message
";
$email .= "
" . print_r( $vars , 1) . "" ;
$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) && ( $number
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 ;
Beyond the Hype: Assessing PHP's Role TodayApr 12, 2025 am 12:17 AMPHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.
What are Weak References in PHP and when are they useful?Apr 12, 2025 am 12:13 AMIn PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.
Explain the __invoke magic method in PHP.Apr 12, 2025 am 12:07 AMThe \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.
Explain Fibers in PHP 8.1 for concurrency.Apr 12, 2025 am 12:05 AMFibers was introduced in PHP8.1, improving concurrent processing capabilities. 1) Fibers is a lightweight concurrency model similar to coroutines. 2) They allow developers to manually control the execution flow of tasks and are suitable for handling I/O-intensive tasks. 3) Using Fibers can write more efficient and responsive code.
The PHP Community: Resources, Support, and DevelopmentApr 12, 2025 am 12:04 AMThe PHP community provides rich resources and support to help developers grow. 1) Resources include official documentation, tutorials, blogs and open source projects such as Laravel and Symfony. 2) Support can be obtained through StackOverflow, Reddit and Slack channels. 3) Development trends can be learned by following RFC. 4) Integration into the community can be achieved through active participation, contribution to code and learning sharing.
PHP vs. Python: Understanding the DifferencesApr 11, 2025 am 12:15 AMPHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.
PHP: Is It Dying or Simply Adapting?Apr 11, 2025 am 12:13 AMPHP is not dying, but constantly adapting and evolving. 1) PHP has undergone multiple version iterations since 1994 to adapt to new technology trends. 2) It is currently widely used in e-commerce, content management systems and other fields. 3) PHP8 introduces JIT compiler and other functions to improve performance and modernization. 4) Use OPcache and follow PSR-12 standards to optimize performance and code quality.
The Future of PHP: Adaptations and InnovationsApr 11, 2025 am 12:01 AMThe future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.
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