46 个非常有用的 PHP 代码片段

这些 PHP 片段对于 PHP 初学者也非常有帮助，非常容易学习，让我们开始学习吧～

<font size="4">1. 发送 SMS

在开发 Web 或者移动应用的时候，经常会遇到需要发送 SMS 给用户，或者因为登录原因，或者是为了发送信息。下面的 PHP 代码就实现了发送 SMS 的功能。
为了使用任何的语言发送 SMS，需要一个 SMS gateway。大部分的 SMS 会提供一个 API，这里是使用 <a target="_blank" href="http://msg91.com/ ">MSG91 作为 SMS gateway。

//Sender ID,While using route4 sender id should be 6 characters long.

$senderId = "IKOONK";
//Your message to send,Add URL encoding here.

$message = urlencode($msg);
//Define route

$route = "template";

//Prepare you post parameters

$postData = array(

'authkey' => $authKey,'mobiles' => $mobileNumber,'message' => $message,'sender' => $senderId,'route' => $route

);
//API URL

$url="https://control.msg91.com/sendhttp.php";
// init the resource

$ch = curl_init();

curl_setopt_array($ch,array(

CURLOPT_URL => $url,CURLOPT_RETURNTRANSFER => true,CURLOPT_POST => true,CURLOPT_POSTFIELDS => $postData

//,CURLOPT_FOLLOWLOCATION => true

));
//Ignore SSL certificate verification

curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,0);

curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,0);
//get response

$output = curl_exec($ch);

//Print error if any

if(curl_errno($ch))

{

echo 'error:' . curl_error($ch);

}
curl_close($ch);

}

其中“$authKey = "XXXXXXXXXXX";”需要你输入你的密码，“$senderId = "IKOONK";”需要你输入你的 SenderID。当输入移动号码的时候需要指定国家代码 (比如，美国是 1，印度是 91 )。语法：

2. 使用 mandrill 发送邮件是一款强大的 SMTP 提供器。开发者倾向于使用一个第三方 SMTP provider 来获取更好的收件交付。下面的函数中，你需要把 “” 放在同一个文件夹，作为 PHP 文件，这样就可以使用TA来发送邮件。

$message = new stdClass();

$message->html = $message1;

$message->text = $message1;

$message->subject = $subject;

$message->from_email = "blog@koonk.com";//Sender Email

$message->from_name = "KOONK";//Sender Name

$message->to = array(array("email" => $to_email));

$message->track_opens = true;
$response = $mandrill->messages->send($message);

}

$apikey = 'XXXXXXXXXX'; //specify your api key here”这里需要你指定你的 API 密钥（从 Mandrill 账户中获得）。语法：

为了达到最好的效果，最好按照 Mandrill 的教程去配置 DNS。

<font size="4">3. PHP 函数：阻止 SQL 注入
<a target="_blank" href="https://en.wikipedia.org/wiki/SQL_injection ">SQL 注入或者 SQLi 常见的攻击网站的手段，使用下面的代码可以帮助你防止这些工具。

 $val)
  {
  $output[$key] = clean($val);
  // $output[$key] = $this->clean($val);
 }
 }
 else
 {
 $output = (string) $input;
 // if magic quotes is on then use strip slashes
 if (get_magic_quotes_gpc()) 
 {
  $output = stripslashes($output);
 }
 // $output = strip_tags($output);
 $output = htmlentities($output,ENT_QUOTES,'UTF-8');
 }
// return the clean text
 return $output;
}

语法：

4. 检测用户位置使用下面的函数，可以检测用户是在哪个城市访问你的网站

$default = 'UNKNOWN';
$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',$regs) ) {

$state = $regs[1];

}
if( $city!='' && $state!='' ){

$location = $city . ',' . $state;

return $location;

}else{

return $default;

}
}

语法：

5. 获取 Web 页面的源代码使用下面的函数，可以获取任意 Web 页面的 HTML 代码

 $line) { 
 // loop thru each line and prepend line numbers
 $output.= "Line #{$line_num} : " . htmlspecialchars($line) . "\n";
}
}

语法：

6. 计算喜欢你的 Facebook 页面的用户

likes;
 return $likes;
}

7. 确定任意图片的主导颜色

> 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);
}

8. whois 查询 使用下面的函数可以获取任何域名用户的完整细节

// 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;

}

语法：

9. 验证邮箱地址有时候，当在网站填写表单，用户可能会输入错误的邮箱地址，这个函数可以验证邮箱地址是否有效。

语法：

<?php

$email = "blog@koonk.com";

$check = is_validemail($email);

echo $check;

// If the output is 1,then email is valid.

?>

10. 获取用户的真实 IP




11. 转换 URL：从字符串变成超链接 
如果你正在开发论坛，博客或者是一个常规的表单提交，很多时候都要用户访问一个网站。使用这个函数，URL 字符串就可以自动的转换为超链接。 

',$text); 
 $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#?&//=]+)','\1',$text); 
 $text = eregi_replace('([_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3})','',$text); 
return $text;

}
语法：

<?php

$text = "This is my first post on http://blog.koonk.com";

$text = makeClickableLinks($text);

echo $text;

?>


12. 阻止多个 IP 访问你的网站 
这个代码片段可以方便你禁止某些特定的 IP 地址访问你的网站 

// search current IP in $deny_ips array

if ( (array_search($ip,$deny_ips))!== FALSE ) {

// address is blocked:

echo 'Your IP adress ('.$ip.') was blocked!';

exit;

}


13. 强制性文件下载 
如果你需要下载特定的文件而不用另开新窗口，下面的代码片段可以帮助你。 


语法： 



14. 创建 JSON 数据 
使用下面的 PHP 片段可以创建 JSON 数据，可以方便你创建移动应用的 Web 服务 

1,'name'=>"Mohit");
echo json_encode($json_data);

15. 压缩 zip 文件 
使用下面的 PHP 片段可以即时压缩 zip 文件 

open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) { 
  return false; 
 } 
 //add the files 
 foreach($valid_files as $file) { 
  $zip->addFile($file,$file); 
 } 
 //debug 
 //echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status; 
//close the zip -- done!

$zip->close(); 
//check to make sure the file exists

return file_exists($destination);

}

else

{

return false;

}

}
语法：

<?php

$files=array('file1.jpg','file2.jpg','file3.gif');

create_zip($files,'myzipfile.zip',true);

?>


16. 解压文件 


语法： 



17. 缩放图片 

if($ext == "jpg" || $ext == "jpeg")

$im = imagecreatefromjpeg($tmpname);

elseif($ext == "png")

$im = imagecreatefrompng($tmpname);

elseif($ext == "gif")

$im = imagecreatefromgif($tmpname); 
$x = imagesx($im);

$y = imagesy($im); 
if($x <= $xmax && $y <= $ymax)

return $im; 
if($x >= $y) {

$newx = $xmax;

$newy = $newx  $y / $x;

}

else {

$newy = $ymax;

$newx = $x / $y  $newy;

} 
$im2 = imagecreatetruecolor($newx,$newy);

imagecopyresized($im2,$im,floor($newx),floor($newy),$y);

return $im2;

}


18. 使用 mail() 发送邮件 
之前我们提供了如何使用 Mandrill 发送邮件的 PHP 代码片段，但是如果你不想使用第三方服务，那么可以使用下面的 PHP 代码片段。 

语法：

<?php

$to = "admin@koonk.com";

$subject = "This is a test mail";

$body = "Hello World!";

send_mail($to,$body);

?>

19. 把秒转换成天数，小时数和分钟 

=86400){$days=floor($secs/86400);$secs=$secs%86400;$r=$days.' day';if($days<>1){$r.='s';}if($secs>0){$r.=',';}}
 if($secs>=3600){$hours=floor($secs/3600);$secs=$secs%3600;$r.=$hours.' hour';if($hours<>1){$r.='s';}if($secs>0){$r.=',';}}
 if($secs>=60){$minutes=floor($secs/60);$secs=$secs%60;$r.=$minutes.' minute';if($minutes<>1){$r.='s';}if($secs>0){$r.=',';}}
 $r.=$secs.' second';if($secs<>1){$r.='s';}
 return $r;
}


20. 数据库连接 
连接 MySQL 数据库 


21. 目录清单 
使用下面的 PHP 代码片段可以在一个目录中列出所有文件和文件夹 

'."\n";
  }
  }
  closedir($handle);
 }
 }
}

语法： 



22. 检测用户语言 
使用下面的 PHP 代码片段可以检测用户浏览器所使用的语言 


23. 查看 CSV 文件 

语法：

<?php

$csvFile = "test.csv";

$csv = readCSV($csvFile);

$a = csv[0][0]; // This will get value of Column 1 & Row 1

?>


24. 从 PHP 数据创建 CSV 文件 

语法：

<?php

$data[0] = "apple";

$data[1] = "oranges";

generateCsv($data,$enclosure = '"');

?>


25. 解析 XML 数据 

//load the xml string using simplexml function

$xml = simplexml_load_string($xml_string);
//loop through the each node of molecule

foreach ($xml->molecule as $record)

{

//attribute are accessted by

echo $record['name'],' ';

//node are accessted by -> operator

echo $record->symbol,' ';

echo $record->code,'';

}


26. 解析 JSON 数据 

name; //displays rolf
echo $obj->office[0]; //displays google

<font size="4">27. 获取当前页面 URL

这个 PHP 片段可以帮助你让用户登录后直接跳转到之前浏览的页面 


语法： 



28. 从任意的 Twitter 账号获取最新的 Tweet 

getName() == "content") {
  $content = $value . "";
 echo '';
  } 
 }
 } 
}
语法：

<?php

$handle = "koonktech";

my_twitter($handle);

?>


29. 转发数量 
使用这个 PHP 片段可以检测你的页面 URL 有多少转发数量 

story->url_count;
 if($retweets){
 return $retweets;
 } else {
 return 0;
 }
}
语法：

<?php

$url = "http://blog.koonk.com";

$count = tweetCount($url);

return $count;

?>


30. 计算两个日期的差 

diff($date2);
echo "difference " . $interval->y . " years," . $interval->m." months,".$interval->d." days "; 
// shows the total amount of days (not divided into years,months and days like above)
echo "difference " . $interval->days . " days ";
-------------------------------------------------------- OR
/**

Calculate differences between two dates with precise semantics. Based on PHPs DateTime::diff()
implementation by Derick Rethans. Ported to PHP by Emil H,2011-05-02. No rights reserved.


See here for original code:
http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/tm2unixtime.c?revision=302890&view=markup
http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c?revision=298973&view=markup

/

function _date_range_limit($start,$end,$adj,$a,$b,$result)

{

if ($result[$a] < $start) {

$result[$b] -= intval(($start - $result[$a] - 1) / $adj) + 1;

$result[$a] += $adj  intval(($start - $result[$a] - 1) / $adj + 1);

}

if ($result[$a] >= $end) {

$result[$b] += intval($result[$a] / $adj);

$result[$a] -= $adj * intval($result[$a] / $adj);

}

return $result;

}

function _date_range_limit_days($base,$result)

{

$days_in_month_leap = array(31,31,29,30,31);

$days_in_month = array(31,28,31);

_date_range_limit(1,13,12,"m","y",&$base);

$year = $base["y"];

$month = $base["m"];

if (!$result["invert"]) {

while ($result["d"] < 0) {

$month--;

if ($month < 1) {

$month += 12;

$year--;

}

$leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0);

$days = $leapyear ? $days_in_month_leap[$month] : $days_in_month[$month];

$result["d"] += $days;

$result["m"]--;

}

} else {

while ($result["d"] < 0) {

$leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0);

$days = $leapyear ? $days_in_month_leap[$month] : $days_in_month[$month];

$result["d"] += $days;

$result["m"]--;

$month++;

if ($month > 12) {

$month -= 12;

$year++;

}

}

}

return $result;

}

function _date_normalize($base,$result)

{

$result = _date_range_limit(0,60,"s","i",$result);

$result = _date_range_limit(0,"h",24,"d",$result);

$result = _date_range_limit_days(&$base,&$result);

$result = _date_range_limit(0,$result);

return $result;

}

/**
Accepts two unix timestamps.

*/

function _date_diff($one,$two)

{

$invert = false;

if ($one > $two) {

list($one,$two) = array($two,$one);

$invert = true;

}

$key = array("y","s");

$a = array_combine($key,array_map("intval",explode(" ",date("Y m d H i s",$one))));

$b = array_combine($key,$two))));

$result = array();

$result["y"] = $b["y"] - $a["y"];

$result["m"] = $b["m"] - $a["m"];

$result["d"] = $b["d"] - $a["d"];

$result["h"] = $b["h"] - $a["h"];

$result["i"] = $b["i"] - $a["i"];

$result["s"] = $b["s"] - $a["s"];

$result["invert"] = $invert ? 1 : 0;

$result["days"] = intval(abs(($one - $two)/86400));

if ($invert) {

_date_normalize(&$a,&$result);

} else {

_date_normalize(&$b,&$result);

}

return $result;

}

$date = "2014-12-04 19:37:22";

echo '';

print_r( _date_diff( strtotime($date),time() ) );

echo '
';

?>
31. 删除文件夹内容 




语法： 



32. 搜索和高亮字符串中的关键字 

$1",$text );
 }
 return $text;
}
语法： 



33. 写入文件 



34. 根据 URL 下载图片 


语法： 



35. 检测 URL 是否有效 

语法：

<?php

$url = "http://koonk.com";

$check = checkvalidURL($url);

echo $check; //if returns 1 then URL is valid.

?>


36. 生成二维码 

 "http://","TEL" => "TEL:","TXT"=>"","EMAIL" => "MAILTO:");
 if(!in_array($type,array("URL","TEL","TXT","EMAIL")))
 {
 $type = "TXT";
 }
 if (!preg_match('/^'.$types[$type].'/',$data))
 {
 $data = str_replace("\\",$types[$type]).$data;
 }
 $ch = curl_init();
 $data = urlencode($data);
 curl_setopt($ch,CURLOPT_URL,'http://chart.apis.google.com/chart');
 curl_setopt($ch,CURLOPT_POST,true);
 curl_setopt($ch,CURLOPT_POSTFIELDS,'chs='.$size.'x'.$size.'&cht=qr&chld='.$ec.'|'.$margin.'&chl='.$data);
 curl_setopt($ch,false);
 curl_setopt($ch,CURLOPT_TIMEOUT,30);
 $response = curl_exec($ch);
 curl_close($ch);
 return $response;
}

语法： 



37. 计算两个地图坐标之间的距离 


语法： 

 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).'';
}
?>

38. 获取一个特定话题标签的所有 Tweets 

Connecting to $url
 ...";
 $ch = curl_init($url);
 curl_setopt ($ch,TRUE);
 $xml = curl_exec ($ch);
 curl_close ($ch);
 //If you want to see the response from Twitter,uncomment this next part out:
 //echo "Response:";
 //echo "".htmlspecialchars($xml)."";
 $affected = 0;
 $twelement = new SimpleXMLElement($xml);
 foreach ($twelement->entry as $entry) {
 $text = trim($entry->title);
 $author = trim($entry->author->name);
 $time = strtotime($entry->published);
 $id = $entry->id;
 echo "Tweet from ".$author.": 
".$text."
 Posted ".date('n/j/y g:i a',$time)."";
 }
 return true ;
}

39. 添加 th,st,nd 或者 rd 作为数字的后缀 

 4) ? 'th'
  : (($test_c < 4) ? ($test_c < 3) ? ($test_c < 2) ? ($test_c < 1) 
  ? 'th' : 'st' : 'nd' : 'rd' : 'th')); 
 return $cdnl.$ext; 
}
语法： 



40. 限制文件下载的速度 

// set the download rate limit (=> 20,5 kb/s)

$download_rate = 20.5;

if(file_exists($local_file) && is_file($local_file)) {

// send headers

header('Cache-control: private');

header('Content-Type: application/octet-stream');

header('Content-Length: '.filesize($local_file));

header('Content-Disposition: filename='.$download_file);
// flush content

flush();

// open file stream

$file = fopen($local_file,"r");

while(!feof($file)) {
// send the current file part to the browser

print fread($file,round($download_rate * 1024)); 
// flush the content to the browser

flush();
// sleep one second

sleep(1);

} 
// close file stream

fclose($file);}

else {

die('Error: The file '.$local_file.' does not exist!');

}

?>


41. 把文本转换成图片 



42. 获取远程文件的大小 


语法： 



43. 使用 imagebrick 进行 pdf 到图像的转换 



44. 使用 tinyurl 生成短网址 

 save as):\n\t\t";
 echo "\n\t\t";
 echo "\n\t\t";
 echo "\n\t\t";
 echo "\n";
}


46. Facebook 样式的时间戳 

$periods  = array("second","minute","hour","day","week","month","year","decade");

$lengths  = array("60","60","24","7","4.35","12","10");
$now  = time();

$unix_date  = strtotime($date);
// check validity of date

if(empty($unix_date)) {

return "Bad date";

}

// is it future date or past date

if($now > $unix_date) {

$difference = $now - $unix_date;

$tense  = "ago";
} else {

$difference = $unix_date - $now;

$tense  = "from now";

}
for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {

$difference /= $lengths[$j];

}
$difference = round($difference);
if($difference != 1) {

$periods[$j].= "s";

}
return "$difference $periods[$j] {$tense}";

}

语法： 


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46 个非常有用的 PHP 代码片段

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