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) . "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, $domain."rn");
while(!feof($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
$json_data = array ('id'=>1,'name'=>"mohit");
echo json_encode($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: koonkrn";
$headers .= "reply-to: blog@koonk.comrn";
$headers .= "return-path: blog@koonk.comrn";
$headers .= "x-mailer: php5n";
$headers .= 'mime-version: 1.0' . "n";
$headers .= 'content-type: text/html; charset=iso-8859-1' . "rn";
mail($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 = $value . "";
echo '<p class="twit">'.$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 daysn", $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! ";
$output .= "rn";
fputs($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 = './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=$t_id&fmt=17";
echo "ttdownload (right-click > save as):ntt";
echo "<a href="$flv_link">flv</a>ntt";
echo "<a href="$hq_flv_link">hq flv (if available)</a>ntt";
echo "<a href="$mp4_link">mp4</a>ntt";
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
?>
文章转自：http://blog.koonk.com
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