搜索
首页后端开发php教程46 个非常有用的 PHP 代码片段,_PHP教程

46 个非常有用的 PHP 代码片段,


这些 PHP 片段对于 PHP 初学者也非常有帮助,非常容易学习,让我们开始学习吧~

1. 发送 SMS


在开发 Web 或者移动应用的时候,经常会遇到需要发送 SMS 给用户,或者因为登录原因,或者是为了发送信息。下面的 PHP 代码就实现了发送 SMS 的功能。
为了使用任何的语言发送 SMS,需要一个 SMS gateway。大部分的 SMS 会提供一个 API,这里是使用 MSG91 作为 SMS gateway。

function send_sms($mobile,$msg)
{
$authKey = "XXXXXXXXXXX";
date_default_timezone_set("Asia/Kolkata");
$date = strftime("%Y-%m-%d %H:%M:%S");
//Multiple mobiles numbers separated by comma
$mobileNumber = $mobile;
  
//Sender ID,While using route4 sender id should be 6 characters long.
$senderId = "IKOONK";
  
//Your message to send, Add URL encoding here.
$message = urlencode($msg);
  
//Define route 
$route = "template";
//Prepare you post parameters
$postData = array(
 'authkey' => $authKey,
 'mobiles' => $mobileNumber,
 'message' => $message,
 'sender' => $senderId,
 'route' => $route
);
  
//API URL
$url="https://control.msg91.com/sendhttp.php";
  
// init the resource
$ch = curl_init();
curl_setopt_array($ch, array(
 CURLOPT_URL => $url,
 CURLOPT_RETURNTRANSFER => true,
 CURLOPT_POST => true,
 CURLOPT_POSTFIELDS => $postData
 //,CURLOPT_FOLLOWLOCATION => true
));
  
  
//Ignore SSL certificate verification
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
  
  
//get response
$output = curl_exec($ch);
//Print error if any
if(curl_errno($ch))
{
 echo 'error:' . curl_error($ch);
}
  
curl_close($ch);
}

其中“$authKey = "XXXXXXXXXXX";”需要你输入你的密码,“$senderId = "IKOONK";”需要你输入你的 SenderID。当输入移动号码的时候需要指定国家代码 (比如,美国是 1,印度是 91 )。
语法:

<&#63;php
$message = "Hello World";
$mobile = "918112998787";
send_sms($mobile,$message);
&#63;>

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:

<&#63;php
$to = "abc@example.com";
$subject = "This is a test email";
$message = "Hello World!";
send_email($to,$subject,$message);
&#63;>

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:

<&#63;php
$text = "<script>alert(1)</script>";
$text = clean($text);
echo $text;
&#63;>

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)';
   
 $url = 'http://ipinfodb.com/ip_locator.php&#63;ip=' . urlencode($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:

<&#63;php
$ip = $_SERVER['REMOTE_ADDR'];
$city = detect_city($ip);
echo $city;
&#63;>


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:

<&#63;php
$url = "http://blog.koonk.com";
$source = display_sourcecode($url);
echo $source;
&#63;>


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:

<&#63;php
$page = "koonktechnologies";
$count = fb_fan_count($page);
echo $count;
&#63;>


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:

<&#63;php
$domain = "http://www.blog.koonk.com";
$result = whois_query($domain);
print_r($result);
&#63;>


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:
<&#63;php
$email = "blog@koonk.com";
$check = is_validemail($email);
echo $check;
// If the output is 1, then email is valid.
&#63;>

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:

<&#63;php
$ip = getRealIpAddr();
echo $ip;
&#63;>


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@:%_+.~#&#63;&//=]+)', 
 '<a href="\1">\1</a>', $text); 
 $text = eregi_replace('([[:space:]()[{}])(www.[-a-zA-Z0-9@:%_+.~#&#63;&//=]+)', 
 '\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:
<&#63;php
$text = "This is my first post on http://blog.koonk.com";
$text = makeClickableLinks($text);
echo $text;
&#63;>


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']) &#63; 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");
&#63;>


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 &#63; 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:
<&#63;php
$files=array('file1.jpg', 'file2.jpg', 'file3.gif'); 
create_zip($files, 'myzipfile.zip', true); 
&#63;>


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:

<&#63;php
unzip('test.zip','unziped/test'); //File would be unzipped in unziped/test folder
&#63;>


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:
<&#63;php
$to = "admin@koonk.com";
$subject = "This is a test mail";
$body = "Hello World!";
send_mail($to,$subject,$body);
&#63;>

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:

<&#63;php
$seconds = "56789";
$output = secsToStr($seconds);
echo $output;
&#63;>

20. 数据库连接
连接 MySQL 数据库

<&#63;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();
}
&#63;>

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:

<&#63;php
 list_files("images/"); //This will list all files of images folder
&#63;>


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:
<&#63;php
$csvFile = "test.csv";
$csv = readCSV($csvFile);
$a = csv[0][0]; // This will get value of Column 1 & Row 1
&#63;>


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:
<&#63;php
$data[0] = "apple";
$data[1] = "oranges";
generateCsv($data, $delimiter = ',', $enclosure = '"');
&#63;>


25. 解析 XML 数据

$xml_string="<&#63;xml version='1.0'&#63;>
<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:

<&#63;php
echo "Currently you are on: ".current_url();
&#63;>


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&#63;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:
<&#63;php
$handle = "koonktech";
my_twitter($handle);
&#63;>


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) {
 $content = file_get_contents("http://api.tweetmeme.com/url_info&#63;url=".$url);
 $element = new SimpleXmlElement($content);
 $retweets = $element->story->url_count;
 if($retweets){
 return $retweets;
 } else {
 return 0;
 }
}
 
语法:
<&#63;php
$url = "http://blog.koonk.com";
$count = tweetCount($url);
return $count;
&#63;>


30. 计算两个日期的差

<&#63;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&#63;revision=302890&view=markup
 * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c&#63;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 &#63; $days_in_month_leap[$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 &#63; $days_in_month_leap[$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 &#63; 1 : 0;
 $result["days"] = intval(abs(($one - $two)/86400));
 if ($invert) {
 _date_normalize(&$a, &$result);
 } else {
 _date_normalize(&$b, &$result);
 }
 return $result;
}
$date = "2014-12-04 19:37:22";
echo '<pre class="brush:php;toolbar:false">';
print_r( _date_diff( strtotime($date), time() ) );
echo '
'; ?>

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:

<&#63;php
$path = "images/";
Delete($path); // This will delete images folder along with its contents.
&#63;>


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:

<&#63;php
$string = "I like chocolates and I like apples";
$words = "apple";
echo highlighter_text($string ,$words);
&#63;>




33. 写入文件

<&#63;
$filename = 'blog.csv';
$fp = fopen($filename, 'w');
$output = " Hello ";
$output .= " World! ";
$output .= "\r\n";
fputs($fp, $output);
fclose($fp);
&#63;>


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:

<&#63;php
$url = "http://koonk.com/images/logo.png";
$rename = "koonk.png";
imagefromURL($url,$rename);
&#63;>


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:
<&#63;php
$url = "http://koonk.com";
$check = checkvalidURL($url);
echo $check; //if returns 1 then URL is valid.
&#63;>


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:

<&#63;php
header("Content-type: image/png");
echo qr_code("http://koonk.com", "URL");
&#63;>


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:

<&#63;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).'';
}
&#63;>


38. 获取一个特定话题标签的所有 Tweets

function getTweets($hash_tag) {
 $url = 'http://search.twitter.com/search.atom&#63;q='.urlencode($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 ($ch);
 //If you want to see the response from Twitter, uncomment this next part out:
 //echo "<p>Response:</p>";
 //echo "<pre class="brush:php;toolbar:false">".htmlspecialchars($xml)."
"; $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($cdnl) %100 > 4) &#63; 'th'
  : (($test_c < 4) &#63; ($test_c < 3) &#63; ($test_c < 2) &#63; ($test_c < 1) 
  &#63; 'th' : 'st' : 'nd' : 'rd' : 'th')); 
 return $cdnl.$ext; 
}

语法:

<&#63;php
$number = 10;
echo ordinal($number); //output is 10th
&#63;>


40. 限制文件下载的速度

<&#63;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!');
}
&#63;>


41. 把文本转换成图片

<&#63;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);
&#63;>


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].+&#63;)\s/';
 $count = preg_match($regex, $head, $matches);
 return isset($matches[1]) &#63; $matches[1] : "unknown";
}


语法:

<&#63;php
$file = "http://koonk.com/images/logo.png";
$size = remote_filesize($url);
echo $size;
&#63;>


43. 使用 imagebrick 进行 pdf 到图像的转换

<&#63;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;
&#63;>


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&#63;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:

<&#63;php
$url = "http://blog.koonk.com/2015/07/Hello-World";
$tinyurl = get_tiny_url($url);
echo $tinyurl;
&#63;>


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=", "&");
 $flv_link = "http://www.youtube.com/get_video&#63;video_id=$v_id&t=$t_id";
 $hq_flv_link = "http://www.youtube.com/get_video&#63;video_id=$v_id&t=$t_id&fmt=6";
 $mp4_link = "http://www.youtube.com/get_video&#63;video_id=$v_id&t=$t_id&fmt=18";
 $threegp_link = "http://www.youtube.com/get_video&#63;video_id=$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:

<&#63;php
$date = "2015-07-05 03:45";
$result = nicetime($date); // 2 days ago
&#63;>

文章转自:http://blog.koonk.com

您可能感兴趣的文章:

  • 7个超级实用的PHP代码片段
  • 10个实用的PHP代码片段
  • 超级实用的7个PHP代码片段分享
  • 19个超实用的PHP代码片段
  • 9个实用的PHP代码片段分享
  • 10个超级有用值得收藏的PHP代码片段
  • 6个超实用的PHP代码片段
  • 10个超级有用的PHP代码片段果断收藏
  • 又十个超级有用的PHP代码片段
  • 必须收藏的23个php实用代码片段
  • 必须收藏的php实用代码片段

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/1100916.htmlTechArticle46 个非常有用的 PHP 代码片段, 这些 PHP 片段对于 PHP 初学者也非常有帮助,非常容易学习,让我们开始学习吧~ 1. 发送 SMS 在开发 Web 或者...
声明
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系admin@php.cn
php怎么把负数转为正整数php怎么把负数转为正整数Apr 19, 2022 pm 08:59 PM

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

php怎么实现几秒后执行一个函数php怎么实现几秒后执行一个函数Apr 24, 2022 pm 01:12 PM

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php字符串有没有下标php字符串有没有下标Apr 24, 2022 am 11:49 AM

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php怎么除以100保留两位小数php怎么除以100保留两位小数Apr 22, 2022 pm 06:23 PM

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php怎么读取字符串后几个字符php怎么读取字符串后几个字符Apr 22, 2022 pm 08:31 PM

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

php怎么根据年月日判断是一年的第几天php怎么根据年月日判断是一年的第几天Apr 22, 2022 pm 05:02 PM

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php怎么替换nbsp空格符php怎么替换nbsp空格符Apr 24, 2022 pm 02:55 PM

方法:1、用“str_replace("&nbsp;","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\&nbsp\;||\xc2\xa0)/","其他字符",$str)”语句。

php怎么查找字符串是第几位php怎么查找字符串是第几位Apr 22, 2022 pm 06:48 PM

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。

See all articles

热AI工具

Undresser.AI Undress

Undresser.AI Undress

人工智能驱动的应用程序,用于创建逼真的裸体照片

AI Clothes Remover

AI Clothes Remover

用于从照片中去除衣服的在线人工智能工具。

Undress AI Tool

Undress AI Tool

免费脱衣服图片

Clothoff.io

Clothoff.io

AI脱衣机

AI Hentai Generator

AI Hentai Generator

免费生成ai无尽的。

热门文章

R.E.P.O.能量晶体解释及其做什么(黄色晶体)
3 周前By尊渡假赌尊渡假赌尊渡假赌
R.E.P.O.最佳图形设置
3 周前By尊渡假赌尊渡假赌尊渡假赌
R.E.P.O.如果您听不到任何人,如何修复音频
3 周前By尊渡假赌尊渡假赌尊渡假赌

热工具

Atom编辑器mac版下载

Atom编辑器mac版下载

最流行的的开源编辑器

Dreamweaver CS6

Dreamweaver CS6

视觉化网页开发工具

Dreamweaver Mac版

Dreamweaver Mac版

视觉化网页开发工具

记事本++7.3.1

记事本++7.3.1

好用且免费的代码编辑器

MinGW - 适用于 Windows 的极简 GNU

MinGW - 适用于 Windows 的极简 GNU

这个项目正在迁移到osdn.net/projects/mingw的过程中,你可以继续在那里关注我们。MinGW:GNU编译器集合(GCC)的本地Windows移植版本,可自由分发的导入库和用于构建本地Windows应用程序的头文件;包括对MSVC运行时的扩展,以支持C99功能。MinGW的所有软件都可以在64位Windows平台上运行。