46 个非常有用的 PHP 代码片段

在编写代码的时候有个神奇的工具总是好的！下面这里收集了 40+ PHP 代码片段，可以帮助你开发 PHP 项目。

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

$output.= "Line #{$line_num} : " . htmlspecialchars($line) . " \n";

}

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."\r\n");

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 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 = "../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

1 2	`$json_data` `=` `array` `('id'=>1,'name'=>"Mohit");` `echo` `json_encode($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\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);

}

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> '."\n";

}

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 ''.$content.' <a class="twt" href="'.$link.'" title="">  </a>';

}

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

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

<?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\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=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" ,

"$1" , $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 .= "\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：

<?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 "Connecting to $url ...";

$ch = curl_init($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 "Response:";

//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 "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

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 = './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 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 "\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> \n";

}

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

?>

via blog.koonk.com