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~

  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 MSG91 作为 SMS gateway。

  function send_sms($mobile,$msg)

  {

  $authKey = "XXXXXXXXXXX";

  date_default_timezone_set("Asia/Kolkata");

  $date = strftime("%Y-%m-%d %H:%M:%S");

  //Multiple mobiles numbers separated by comma

  $mobileNumber = $mobile;

  //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:

  <?php

  $message = "Hello World";

  $mobile = "918112998787";

  send_sms($mobile,$message);

  ?>

  2. 使用 mandrill 发送邮件

  Mandrill 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 “Mandrill.php” 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。

  function send_email($to_email,$subject,$message1)

  {

  require_once 'Mandrill.php';

  $apikey = 'XXXXXXXXXX'; //specify your api key here

  $mandrill = new Mandrill($apikey);

  $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:

  <?php

  $to = "abc@example.com";

  $subject = "This is a test email";

  $message = "Hello World!";

  send_email($to,$subject,$message);

  ?>

  为了达到最好的效果,最好按照 Mandrill 的教程去配置 DNS。

  3. PHP 函数:阻止 SQL 注入

  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。

  function clean($input)

  {

  if (is_array($input))

  {

  foreach ($input as $key => $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:

  <?php

  $text = "<script>alert(1)</script>";

  $text = clean($text);

  echo $text;

  ?>

  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

  function detect_city($ip) {

  $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('{<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;

  }

  }

  语法:

  <?php

  $ip = $_SERVER['REMOTE_ADDR'];

  $city = detect_city($ip);

  echo $city;

  ?>

  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

  function display_sourcecode($url)

  {

  $lines = file($url);

  $output = "";

  foreach ($lines as $line_num => $line) {

  // loop thru each line and prepend line numbers

  $output.= "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "

  ";

  }

  }

  语法:

  <?php

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

  $source = display_sourcecode($url);

  echo $source;

  ?>

  6. 计算喜欢你的 Facebook 页面的用户

  function fb_fan_count($facebook_name)

  {

  $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name));

  $likes = $data->likes;

  return $likes;

  }

  语法:

  <?php

  $page = "koonktechnologies";

  $count = fb_fan_count($page);

  echo $count;

  ?>

  7. 确定任意图片的主导颜色

  function dominant_color($image)

  {

  $i = imagecreatefromjpeg($image);

  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);

  }

  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

  function whois_query($domain) {

  // fix the domain name:

  $domain = strtolower(trim($domain));

  $domain = preg_replace('/^http:///i', '', $domain);

  $domain = preg_replace('/^wwwhttp://www.jb51.net/article/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."

  ");

  while(!feof($conn)) {

  $output .= fgets($conn,128);

  }

  fclose($conn);

  }

  else { die('Error: Could not connect to ' . $nic_server . '!'); }

  return $output;

  }

  语法:

  <?php

  $domain = "http://www.blog.koonk.com";

  $result = whois_query($domain);

  print_r($result);

  ?>

  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。

  function is_validemail($email)

  {

  $check = 0;

  if(filter_var($email,FILTER_VALIDATE_EMAIL))

  {

  $check = 1;

  }

  return $check;

  }

  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

  function getRealIpAddr()

  {

  if (!emptyempty($_SERVER['HTTP_CLIENT_IP']))

  {

  $ip=$_SERVER['HTTP_CLIENT_IP'];

  }

  elseif (!emptyempty($_SERVER['HTTP_X_FORWARDED_FOR']))

  //to check ip is pass from proxy

  {

  $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];

  }

  else

  {

  $ip=$_SERVER['REMOTE_ADDR'];

  }

  return $ip;

  }

  语法:

  <?php

  $ip = getRealIpAddr();

  echo $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。

  function makeClickableLinks($text)

  {

  $text = eregi_replace('(((f|ht){1}tp://)[-a-zA-Z0-9@:%_+.~#?&//=]+)',

  '<a href="http://www.jb51.net/article/1">1</a>', $text);

  $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#?&//=]+)',

  '1<a href="http://2">2</a>', $text);

  $text = eregi_replace('([_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3})',

  '<a href="http://www.jb51.net/article/mailto:1">1</a>', $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

  if ( !file_exists('blocked_ips.txt') ) {

  $deny_ips = array(

  '127.0.0.1',

  '192.168.1.1',

  '83.76.27.9',

  '192.168.1.163'

  );

  } else {

  $deny_ips = file('blocked_ips.txt');

  }

  // read user ip adress:

  $ip = isset($_SERVER['REMOTE_ADDR']) ? trim($_SERVER['REMOTE_ADDR']) : '';

  // 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。

  function force_download($file)

  {

  $dir = "http://www.jb51.net/log/exports/";

  if ((isset($file))&&(file_exists($dir.$file))) {

  header("Content-type: application/force-download");

  header('Content-Disposition: inline; filename="' . $dir.$file . '"');

  header("Content-Transfer-Encoding: Binary");

  header("Content-length: ".filesize($dir.$file));

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

  header('Content-Disposition: attachment; filename="' . $file . '"');

  readfile("$dir$file");

  } else {

  echo "No file selected";

  }

  }

  语法:

  <php

  force_download("image.jpg");

  ?>

  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

  $json_data = array ('id'=>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

  function create_zip($files = array(),$destination = '',$overwrite = false) {

  //if the zip file already exists and overwrite is false, return false

  if(file_exists($destination) && !$overwrite) { return false; }

  //vars

  $valid_files = array();

  //if files were passed in...

  if(is_array($files)) {

  //cycle through each file

  foreach($files as $file) {

  //make sure the file exists

  if(file_exists($file)) {

  $valid_files[] = $file;

  }

  }

  }

  //if we have good files...

  if(count($valid_files)) {

  //create the archive

  $zip = new ZipArchive();

  if($zip->open($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

  function unzip($location,$newLocation)

  {

  if(exec("unzip $location",$arr)){

  mkdir($newLocation);

  for($i = 1;$i< count($arr);$i++){

  $file = trim(preg_replace("~inflating: ~","",$arr[$i]));

  copy($location.'/'.$file,$newLocation.'/'.$file);

  unlink($location.'/'.$file);

  }

  return TRUE;

  }else{

  return FALSE;

  }

  }

  语法:

  <?php

  unzip('test.zip','unziped/test'); //File would be unzipped in unziped/test folder

  ?>

  17. 缩放图片

  function resize_image($filename, $tmpname, $xmax, $ymax)

  {

  $ext = explode(".", $filename);

  $ext = $ext[count($ext)-1];

  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, $im, 0, 0, 0, 0, floor($newx), floor($newy), $x, $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。

  function send_mail($to,$subject,$body)

  {

  $headers = "From: KOONK

  ";

  $headers .= "Reply-To: blog@koonk.com

  ";

  $headers .= "Return-Path: blog@koonk.com

  ";

  $headers .= "X-Mailer: PHP5

  ";

  $headers .= 'MIME-Version: 1.0' . "

  ";

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

  ";

  mail($to,$subject,$body,$headers);

  }

  语法:

  <?php

  $to = "admin@koonk.com";

  $subject = "This is a test mail";

  $body = "Hello World!";

  send_mail($to,$subject,$body);

  ?>

  19. 把秒转换成天数,小时数和分钟

  function secsToStr($secs) {

  if($secs>=86400){$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;

  }

  语法:

  <?php

  $seconds = "56789";

  $output = secsToStr($seconds);

  echo $output;

  ?>

  20. 数据库连接

  连接 MySQL 数据库

  <?php

  $DBNAME = 'koonk';

  $HOST = 'localhost';

  $DBUSER = 'root';

  $DBPASS = 'koonk';

  $CONNECT = mysql_connect($HOST,$DBUSER,$DBPASS);

  if(!$CONNECT)

  {

  echo 'MySQL Error: '.mysql_error();

  }

  $SELECT = mysql_select_db($DBNAME);

  if(!$SELECT)

  {

  echo 'MySQL Error: '.mysql_error();

  }

  ?>

  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

  function list_files($dir)

  {

  if(is_dir($dir))

  {

  if($handle = opendir($dir))

  {

  while(($file = readdir($handle)) !== false)

  {

  if($file != "." && $file != ".." && $file != "Thumbs.db"/*pesky windows, images..*/)

  {

  echo '<a target="_blank" href="http://www.jb51.net/article/'.$dir.$file.'">'.$file.'</a>'."

  ";

  }

  }

  closedir($handle);

  }

  }

  }

  语法:

  <?php

  list_files("images/"); //This will list all files of images folder

  ?>

  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

  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;

  }

  23. 查看 CSV 文件

  function readCSV($csvFile){

  $file_handle = fopen($csvFile, 'r');

  while (!feof($file_handle) ) {

  $line_of_text[] = fgetcsv($file_handle, 1024);

  }

  fclose($file_handle);

  return $line_of_text;

  }

  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

  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;

  }

  语法:

  <?php

  $data[0] = "apple";

  $data[1] = "oranges";

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

  ?>

  25. 解析 XML 数据

  $xml_string="<?xml version='1.0'?>

  <moleculedb>

  <molecule name='Benzine'>

  <symbol>ben</symbol>

  <code>A</code>

  </molecule>

  <molecule name='Water'>

  <symbol>h2o</symbol>

  <code>K</code>

  </molecule>

  </moleculedb>";

  //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

  $json_string='{"id":1,"name":"rolf","country":"russia","office":["google","oracle"]} ';

  $obj=json_decode($json_string);

  //print the parsed data

  echo $obj->name; //displays rolf

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

  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

  function current_url()

  {

  $url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];

  $validURL = str_replace("&", "&", $url);

  return validURL;

  }

  语法:

  <?php

  echo "Currently you are on: ".current_url();

  ?>

  28. 从任意的 Twitter 账号获取最新的 Tweet

  function my_twitter($username)

  {

  $no_of_tweets = 1;

  $feed = "http://search.twitter.com/search.atom?q=from:" . $username . "&rpp=" . $no_of_tweets;

  $xml = simplexml_load_file($feed);

  foreach($xml->children() as $child) {

  foreach ($child as $value) {

  if($value->getName() == "link") $link = $value['href'];

  if($value->getName() == "content") {

  $content = $value . "";

  echo '<p class="twit">'.$content.' <a class="twt" href="http://www.jb51.net/article/'.$link.'" title=""> </a></p>';

  }

  }

  }

  }

  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

  function tweetCount($url) {

  $content = file_get_contents("http://api.tweetmeme.com/url_info?url=".$url);

  $element = new SimpleXmlElement($content);

  $retweets = $element->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

  <?php

  $date1 = date( 'Y-m-d' );

  $date2 = "2015-12-04";

  $diff = abs(strtotime($date2) - strtotime($date1));

  $years = floor($diff / (365*60*60*24));

  $months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));

  $days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));

  printf("%d years, %d months, %d days

  ", $years, $months, $days);

  -------------------------------------------------------- OR

  $date1 = new DateTime("2007-03-24");

  $date2 = new DateTime("2009-06-26");

  $interval = $date1->diff($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, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

  $days_in_month = array(31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 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, 60, "s", "i", $result);

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

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

  $result = _date_range_limit(0, 12, 12, "m", "y", $result);

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

  $result = _date_range_limit(0, 12, 12, "m", "y", $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", "m", "d", "h", "i", "s");

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

  $b = array_combine($key, array_map("intval", explode(" ", date("Y m d H i s", $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 '<pre>';

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

  echo '</pre>';

  ?>

  31. 删除文件夹内容

  function Delete($path)

  {

  if (is_dir($path) === true)

  {

  $files = array_diff(scandir($path), array('.', '..'));

  foreach ($files as $file)

  {

  Delete(realpath($path) . '/' . $file);

  }

  return rmdir($path);

  }

  else if (is_file($path) === true)

  {

  return unlink($path);

  }

  return false;

  }

  语法:

  <?php

  $path = "images/";

  Delete($path); // This will delete images folder along with its contents.

  ?>

  32. 搜索和高亮字符串中的关键字

  function highlighter_text($text, $words)

  {

  $split_words = explode( " " , $words );

  foreach($split_words as $word)

  {

  $color = "#4285F4";

  $text = preg_replace("|($word)|Ui" ,

  "<span style="color:".$color.";"><b>$1</b></span>" , $text );

  }

  return $text;

  }

  语法:

  <?php

  $string = "I like chocolates and I like apples";

  $words = "apple";

  echo highlighter_text($string ,$words);

  ?>

  33. 写入文件

  <?

  $filename = 'blog.csv';

  $fp = fopen($filename, 'w');

  $output = " Hello ";

  $output .= " World! ";

  $output .= "

  ";

  fputs($fp, $output);

  fclose($fp);

  ?>

  34. 根据 URL 下载图片

  function imagefromURL($image,$rename)

  {

  $ch = curl_init($image);

  curl_setopt($ch, CURLOPT_HEADER, 0);

  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

  curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);

  $rawdata=curl_exec ($ch);

  curl_close ($ch);

  $fp = fopen("$rename",'w');

  fwrite($fp, $rawdata);

  fclose($fp);

  }

  语法:

  <?php

  $url = "http://koonk.com/images/logo.png";

  $rename = "koonk.png";

  imagefromURL($url,$rename);

  ?>

  35. 检测 URL 是否有效

  function isvalidURL($url)

  {

  $check = 0;

  if (filter_var($url, FILTER_VALIDATE_URL) !== false) {

  $check = 1;

  }

  return $check;

  }

  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

  function qr_code($data, $type = "TXT", $size ='150', $ec='L', $margin='0')

  {

  $types = array("URL" =--> "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, CURLOPT_RETURNTRANSFER, true);

  curl_setopt($ch, CURLOPT_HEADER, false);

  curl_setopt($ch, CURLOPT_TIMEOUT, 30);

  $response = curl_exec($ch);

  curl_close($ch);

  return $response;

  }

  语法:

  <?php

  header("Content-type: image/png");

  echo qr_code("http://koonk.com", "URL");

  ?>

  37. 计算两个地图坐标之间的距离

  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');

  }

  语法:

  <?php

  $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).'';

  }

  ?>

  38. 获取一个特定话题标签的所有 Tweets

  function getTweets($hash_tag) {

  $url = 'http://search.twitter.com/search.atom?q='.urlencode($hash_tag) ;

  echo "<p>Connecting to <strong>$url</strong> ...</p>";

  $ch = curl_init($url);

  curl_setopt ($ch, CURLOPT_RETURNTRANSFER, TRUE);

  $xml = curl_exec ($ch);

  curl_close ($ch);

  //If you want to see the response from Twitter, uncomment this next part out:

  //echo "<p>Response:</p>";

  //echo "<pre>".htmlspecialchars($xml)."</pre>";

  $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 "<p>Tweet from ".$author.": <strong>".$text."</strong> <em>Posted ".date('n/j/y g:i a',$time)."</em></p>";

  }

  return true ;

  }

  39. 添加 th,st,nd 或者 rd 作为数字的后缀

  Friday the 13th

  function ordinal($cdnl){

  $test_c = abs($cdnl) % 10;

  $ext = ((abs($cdnl) %100 < 21 && abs($cdnl) %100 > 4) ? 'th'

  : (($test_c < 4) ? ($test_c < 3) ? ($test_c < 2) ? ($test_c < 1)

  ? 'th' : 'st' : 'nd' : 'rd' : 'th'));

  return $cdnl.$ext;

  }

  语法:

  <?php

  $number = 10;

  echo ordinal($number); //output is 10th

  ?>

  40. 限制文件下载的速度

  <?php

  // local file that should be send to the client

  $local_file = 'test-file.zip';

  // filename that the user gets as default

  $download_file = 'your-download-name.zip';

  // 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

  <?php

  header("Content-type: image/png");

  $string = $_GET['text'];

  $im = imagecreatefrompng("images/button.png");

  $color = imagecolorallocate($im, 255, 255, 255);

  $px = (imagesx($im) - 7.5 * strlen($string)) / 2;

  $py = 9;

  $fontSize = 1;

  imagestring($im, fontSize, $px, $py, $string, $color);

  imagepng($im);

  imagedestroy($im);

  ?>

  42. 获取远程文件的大小

  function remote_filesize($url, $user = "", $pw = "")

  {

  ob_start();

  $ch = curl_init($url);

  curl_setopt($ch, CURLOPT_HEADER, 1);

  curl_setopt($ch, CURLOPT_NOBODY, 1);

  if(!empty($user) && !empty($pw))

  {

  $headers = array('Authorization: Basic ' . base64_encode("$user:$pw"));

  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

  }

  $ok = curl_exec($ch);

  curl_close($ch);

  $head = ob_get_contents();

  ob_end_clean();

  $regex = '/Content-Length:s([0-9].+?)s/';

  $count = preg_match($regex, $head, $matches);

  return isset($matches[1]) ? $matches[1] : "unknown";

  }

  语法:

  <?php

  $file = "http://koonk.com/images/logo.png";

  $size = remote_filesize($url);

  echo $size;

  ?>

  43. 使用 imagebrick 进行 pdf 到图像的转换

  <?php

  $pdf_file = 'http://www.jb51.net/article/pdf/demo.pdf';

  $save_to = 'http://www.jb51.net/article/jpg/demo.jpg'; //make sure that apache has permissions to write in this folder! (common problem)

  //execute ImageMagick command 'convert' and convert PDF to JPG with applied settings

  exec('convert "'.$pdf_file.'" -colorspace RGB -resize 800 "'.$save_to.'"', $output, $return_var);

  if($return_var == 0) { //if exec successfuly converted pdf to jpg

  print "Conversion OK";

  }

  else print "Conversion failed.".$output;

  ?>

  44. 使用 tinyurl 生成短网址

  function get_tiny_url($url)

  {

  $ch = curl_init();

  $timeout = 5;

  curl_setopt($ch,CURLOPT_URL,'http://tinyurl.com/api-create.php?url='.$url);

  curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);

  curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,$timeout);

  $data = curl_exec($ch);

  curl_close($ch);

  return $data;

  }

  语法:

  <?php

  $url = "http://blog.koonk.com/2015/07/Hello-World";

  $tinyurl = get_tiny_url($url);

  echo $tinyurl;

  ?>

  45. youtube 下载链接生成器

  使用下面的 PHP 片段可以让你的用户下载 Youtube 视频

  function str_between($string, $start, $end)

  {

  $string = " ".$string; $ini = strpos($string,$start); if ($ini == 0) return ""; $ini += strlen($start); $len = strpos($string,$end,$ini) - $ini; return substr($string,$ini,$len); }

  function get_youtube_download_link(){

  $youtube_link = $_GET['youtube'];

  $youtube_page = file_get_contents($youtube_link);

  $v_id = str_between($youtube_page, "&video_id=", "&");

  $t_id = str_between($youtube_page, "&t=", "&");

  $flv_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id";

  $hq_flv_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id&fmt=6";

  $mp4_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id&fmt=18";

  $threegp_link = "http://www.youtube.com/get_video?video_id=$v_id&t=$t_id&fmt=17";

  echo " Download (right-click > save as):

  ";

  echo "<a href="http://www.jb51.net/article/$flv_link">FLV</a>

  ";

  echo "<a href="http://www.jb51.net/article/$hq_flv_link">HQ FLV (if available)</a>

  ";

  echo "<a href="http://www.jb51.net/article/$mp4_link">MP4</a>

  ";

  echo "<a href="http://www.jb51.net/article/$threegp_link">3GP</a>

  ";

  }

  46. Facebook 样式的时间戳

  Facebook (x mins age, y hours ago etc)

  function nicetime($date)

  {

  if(empty($date)) {

  return "No date provided";

  }

  $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:

  <?php

  $date = "2015-07-05 03:45";

  $result = nicetime($date); // 2 days ago

  ?>

  文章转自:http://blog.koonk.com

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