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 => $postData //,CURLOPT_FOLLOWLOCATION => true)); //Ignore SSL certificate verificationcurl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); //get response$output = curl_exec($ch);//Print error if anyif(curl_errno($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("/^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, $domain.""); while(!feof($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="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="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 $deny_ips arrayif ( (array_search($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) { $dir = "../log/exports/"; if ((isset($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：
<phpforce_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."/".$file); } return TRUE; }else{ return FALSE; }}语法：
<?phpunzip("test.zip","unziped/test"); //File would be unzipped in unziped/test folder?>17. 缩放图片
function resize_image($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 != ".." && $file != "Thumbs.db"/*pesky windows, images..*/) { echo "<a target="_blank" href="".$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($xml_string); //loop through the each node of moleculeforeach ($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 dataecho $obj->name; //displays rolfecho $obj->office[0]; //displays google27. 获取当前页面 URL 这个 PHP 片段可以帮助你让用户登录后直接跳转到之前浏览的页面
function current_url(){$url = "http://" . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];$validURL = str_replace("&", "&", $url);return validURL;}语法：
<?phpecho "Currently you are on: ".current_url();?>
28. 从任意的 Twitter 账号获取最新的 Tweet
function my_twitter($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="".$link."" title=""> </a></p>"; } } } } 语法：<?php$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 $response;}语法：
<?phpheader("Content-type: image/png");echo qr_code("http://koonk.com", "URL");?>37. 计算两个地图坐标之间的距离
function getDistanceBetweenPointsNew($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 13thfunction 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 ".$local_file." does not exist!");}?>41. 把文本转换成图片
<?phpheader("Content-type: image/png");$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 = "./pdf/demo.pdf";$save_to = "./jpg/demo.jpg"; //make sure that apache has permissions to write in this folder! (common problem)//execute ImageMagick command "convert" and convert PDF to JPG with applied settingsexec("convert "".$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=$t_id&fmt=17"; echo " Download (right-click > save as): "; echo "<a href="$flv_link">FLV</a> "; echo "<a href="$hq_flv_link">HQ FLV (if available)</a> "; echo "<a href="$mp4_link">MP4</a> "; echo "<a href="$threegp_link">3GP</a>";}46. Facebook 样式的时间戳
Facebook (x mins age, y hours ago etc)function nicetime($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
