46 个非常有用的 PHP 代码片段

2020-03-22 17:24:19

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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="http://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 = $postData //,CURLOPT_FOLLOWLOCATION = true
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
}其中“$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：
$message = "Hello World";$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：
$to = "abc@example.com";$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：
$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：
$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) . "/n";}语法：
$url = "http://blog.koonk.com";$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) $data = json_decode(file_get_contents("http://graph.facebook.com/".$facebook_name)); $likes = $data- likes; return $likes;}语法：
$page = "koonktechnologies";$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) $g = ($rgb $b = $rgb $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, $domain."/r/n"); while(!feof($conn)) { $output .= fgets($conn,128); fclose($conn); else { die('Error: Could not connect to ' . $nic_server . '!'); } return $output;}
语法：
$domain = "http://www.blog.koonk.com";$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 $check;$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：
$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; $text = "This is my first post on http://blog.koonk.com";$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：
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; $files=array('file1.jpg', 'file2.jpg', 'file3.gif'); create_zip($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.'/'.$file); return TRUE; }else{ return FALSE;}
语法：
unzip('test.zip','unziped/test'); //File would be unzipped in unziped/test folder
17. 缩放图片
function resize_image($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)$headers = "From: KOONK/r/n";$headers .= "Reply-To: blog@koonk.com/r/n";$headers .= "Return-Path: blog@koonk.com/r/n";$headers .= "X-Mailer: PHP5/n";$headers .= 'MIME-Version: 1.0' . "/n";$headers .= 'Content-type: text/html; charset=iso-8859-1' . "/r/n";mail($to,$subject,$body,$headers);$to = "admin@koonk.com";$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：
$seconds = "56789";$output = secsToStr($seconds);echo $output; 20. 数据库连接
连接 MySQL 数据库
$DBNAME = 'koonk';$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 '."/n"; closedir($handle);}
语法：
list_files("images/"); //This will list all files of images folder
22. 检测用户语言
使用下面的 PHP 代码片段可以检测用户浏览器所使用的语言
function get_client_language($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 $line_of_text;$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 $contents;$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 $obj- office[0]; //displays google
27. 获取当前页面 URL
这个 PHP 片段可以帮助你让用户登录后直接跳转到之前浏览的页面
function current_url()$url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];$validURL = str_replace("&", "&", $url);return validURL;}
语法：
echo "Currently you are on: ".current_url();
28. 从任意的 Twitter 账号获取最新的 Tweet
function my_twitter($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 = $value . ""; echo ' p '.$content.' a href="'.$link.'" title="" /a /p $handle = "koonktech";my_twitter($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 $retweets; } else { return 0;$url = "http://blog.koonk.com";$count = tweetCount($url);return $count;
30. 计算两个日期的差
$date1 = date( 'Y-m-d' );$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/n", $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 " . $interval- days . " days ";-------------------------------------------------------- OR
* Calculate differences between two dates with precise semantics. Based on PHPs DateTime::diff() * implementation by Derick Rethans. Ported to PHP by Emil H, 2011-05-02. No rights reserved. * See here for original code: * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/tm2unixtime.c revision=302890&view=markup * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c revision=298973&view=markupfunction _date_range_limit($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", $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：
$path = "images/";Delete($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 "color:".$color.";/" b $1 /b /span " , $text ); return $text;}语法：
$string = "I like chocolates and I like apples";$words = "apple";echo highlighter_text($string ,$words);
33. 写入文件
$filename = 'blog.csv';$fp = fopen($filename, 'w');$output = " Hello ";$output .= " World! ";$output .= "/r/n";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：
$url = "http://koonk.com/images/logo.png";$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 $check;$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 $response;}
语法：
header("Content-type: image/png");echo qr_code("http://koonk.com", "URL");
37. 计算两个地图坐标之间的距离
function getDistanceBetweenPointsNew($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：
$point1 = array('lat' = 40.770623, 'long' = -73.964367);$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 = $entry- echo " p Tweet from ".$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：
$number = 10;echo ordinal($number); //output is 10th
40. 限制文件下载的速度
// 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 '.$local_file.' does not exist!');
41. 把文本转换成图片
header("Content-type: image/png");$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：
$file = "http://koonk.com/images/logo.png";$size = remote_filesize($url);echo $size;
43. 使用 imagebrick 进行 pdf 到图像的转换
$pdf_file = './pdf/demo.pdf';$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：
$url = "http://blog.koonk.com/2015/07/Hello-World";$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 $mp4_link = "http://www.youtube.com/get_video video_id=$v_id&t=$t_id&fmt=18"; $threegp_link = "http://www.youtube.com/get_video video_id=$v_id&t=$t_id&fmt=17"; echo "/t/tDownload (right-click save as):/n/t/t"; echo " a href=/"$flv_link/" FLV /a /n/t/t"; echo " a href=/"$hq_flv_link/" HQ FLV (if available) /a /n/t/t"; echo " a href=/"$mp4_link/" MP4 /a /n/t/t"; 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：
$date = "2015-07-05 03:45";$result = nicetime($date); // 2 days ago 文章转自：http://blog.koonk.comPHP教程

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