译文 : http://www.imooc.com/article/22041
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 50+ 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~
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。1
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52function 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,“$senderId = “IKOONK”;”需要你输入你的 SenderID。当输入移动号码的时候需要指定国家代码 (比如,美国是 1,印度是 91 )。
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$message = "Hello World";
$mobile = "918112998787";
send_sms($mobile,$message);
使用 mandrill 发送邮件
Mandrill 是一款强大的 SMTP 提供器。开发者倾向于使用一个第三方 SMTP provider 来获取更好的收件交付。
下面的函数中,你需要把 “Mandrill.php” 放在同一个文件夹,作为 PHP 文件,这样就可以使用TA来发送邮件。1
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18function send_email($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);
}
$apikey = 'XXXXXXXXXX'; //specify your api key here”这里需要你指定你的 API 密钥(从 Mandrill 账户中获得)
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$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。
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。1
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24function 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 $output;
}
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$text = "<script>alert(1)</script>";
$text = clean($text);
echo $text;
检测用户位置
使用下面的函数,可以检测用户是在哪个城市访问你的网站1
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44function detect_city($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 $default;
}
}
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$ip = $_SERVER['REMOTE_ADDR'];
$city = detect_city($ip);
echo $city;
获取 Web 页面的源代码
使用下面的函数,可以获取任意 Web 页面的 HTML 代码1
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9function display_sourcecode($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($line) . "\n";
}
}
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$url = "http://blog.koonk.com";
$source = display_sourcecode($url);
echo $source;
计算喜欢你的 Facebook 页面的用户
1 | function fb_fan_count($facebook_name) |
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$page = "koonktechnologies";
$count = fb_fan_count($page);
echo $count;
确定任意图片的主导颜色
1 | function dominant_color($image) |
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1
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81function 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 $output;
}
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$domain = "http://www.blog.koonk.com";
$result = whois_query($domain);
print_r($result);
验证邮箱地址
有时候,当在网站填写表单,用户可能会输入错误的邮箱地址,这个函数可以验证邮箱地址是否有效。1
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9function is_validemail($email)
{
$check = 0;
if(filter_var($email,FILTER_VALIDATE_EMAIL))
{
$check = 1;
}
return $check;
}
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$email = "blog@koonk.com";
$check = is_validemail($email);
echo $check;
// If the output is 1, then email is valid.
获取用户的真实 IP
1 | function getRealIpAddr() |
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$ip = getRealIpAddr();
echo $ip;
转换 URL:从字符串变成超链接
如果你正在开发论坛,博客或者是一个常规的表单提交,很多时候都要用户访问一个网站。使用这个函数,URL 字符串就可以自动的转换为超链接。1
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11function makeClickableLinks($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 $text;
}
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$text = "This is my first post on http://blog.koonk.com";
$text = makeClickableLinks($text);
echo $text;
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1
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19if ( !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;
}
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。1
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15function 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$file");
} else {
echo "No file selected";
}
}
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force_download("image.jpg");
创建 JSON 数据
使用下面的 PHP 片段可以创建 JSON 数据,可以方便你创建移动应用的 Web 服务1
2$json_data = array ('id'=>1,'name'=>"Mohit");
echo json_encode($json_data);
压缩 zip 文件
使用下面的 PHP 片段可以即时压缩 zip 文件1
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40function create_zip($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;
}
}
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$files=array('file1.jpg', 'file2.jpg', 'file3.gif');
create_zip($files, 'myzipfile.zip', true);
解压文件
1 | function unzip($location,$newLocation) |
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unzip('test.zip','unziped/test'); //File would be unzipped in unziped/test folder
缩放图片
1 | function resize_image($filename, $tmpname, $xmax, $ymax) |
使用 mail() 发送邮件
之前我们提供了如何使用 Mandrill 发送邮件的 PHP 代码片段,但是如果你不想使用第三方服务,那么可以使用下面的 PHP 代码片段。1
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10function send_mail($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,$headers);
}
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$to = "admin@koonk.com";
$subject = "This is a test mail";
$body = "Hello World!";
send_mail($to,$subject,$body);
把秒转换成天数,小时数和分钟
1 | function secsToStr($secs) { |
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$seconds = "56789";
$output = secsToStr($seconds);
echo $output;
数据库连接
连接 MySQL 数据库1
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$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(!$SELECT)
{
echo 'MySQL Error: '.mysql_error();
}
目录清单
使用下面的 PHP 代码片段可以在一个目录中列出所有文件和文件夹1
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17function list_files($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($handle);
}
}
}
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list_files("images/"); //This will list all files of images folder
检测用户语言
使用下面的 PHP 代码片段可以检测用户浏览器所使用的语言1
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12function get_client_language($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 $default;
}
查看 CSV 文件
1 | function readCSV($csvFile){ |
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$csvFile = "test.csv";
$csv = readCSV($csvFile);
$a = csv[0][0]; // This will get value of Column 1 & Row 1
从 PHP 数据创建 CSV 文件
1 | function generateCsv($data, $delimiter = ',', $enclosure = '"') { |
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$data[0] = "apple";
$data[1] = "oranges";
generateCsv($data, $delimiter = ',', $enclosure = '"');
解析 XML 数据
1 | $xml_string="<?xml version='1.0'?> |
解析 JSON 数据
1 | $json_string='{"id":1,"name":"rolf","country":"russia","office":["google","oracle"]} '; |
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1
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6function current_url()
{
$url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
$validURL = str_replace("&", "&", $url);
return validURL;
}
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echo "Currently you are on: ".current_url();
从任意的 Twitter 账号获取最新的 Tweet
1 | function my_twitter($username) |
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$handle = "koonktech";
my_twitter($handle);
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1
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10function 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 $retweets;
} else {
return 0;
}
}
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$url = "http://blog.koonk.com";
$count = tweetCount($url);
return $count;
计算两个日期的差
1 |
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删除文件夹内容
1 | function Delete($path) |
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$path = "images/";
Delete($path); // This will delete images folder along with its contents.
搜索和高亮字符串中的关键字
1 | function highlighter_text($text, $words) |
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$string = "I like chocolates and I like apples";
$words = "apple";
echo highlighter_text($string ,$words);
写入文件
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|
根据 URL 下载图片
1 | function imagefromURL($image,$rename) |
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$url = "http://koonk.com/images/logo.png";
$rename = "koonk.png";
imagefromURL($url,$rename);
检测 URL 是否有效
1 | function isvalidURL($url) |
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$url = "http://koonk.com";
$check = checkvalidURL($url);
echo $check; //if returns 1 then URL is valid.
生成二维码
1 | function qr_code($data, $type = "TXT", $size ='150', $ec='L', $margin='0') |
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header("Content-type: image/png");
echo qr_code("http://koonk.com", "URL");
计算两个地图坐标之间的距离
1 | function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) { |
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$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).'';
}
获取一个特定话题标签的所有 Tweets
1 | function getTweets($hash_tag) { |
添加 th,st,nd 或者 rd 作为数字的后缀
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7function ordinal($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;
}
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$number = 10;
echo ordinal($number); //output is 10th
限制文件下载的速度
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把文本转换成图片
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获取远程文件的大小
1 | function remote_filesize($url, $user = "", $pw = "") |
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$file = "http://koonk.com/images/logo.png";
$size = remote_filesize($url);
echo $size;
使用 imagebrick 进行 pdf 到图像的转换
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使用 tinyurl 生成短网址
1 | function get_tiny_url($url) |
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$url = "http://blog.koonk.com/2015/07/Hello-World";
$tinyurl = get_tiny_url($url);
echo $tinyurl;
youtube 下载链接生成器
使用下面的 PHP 片段可以让你的用户下载 Youtube 视频1
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18function str_between($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=\"$threegp_link\">3GP</a>\n";
}
Facebook 样式的时间戳
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38function nicetime($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] {$tense}";
}
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$date = "2015-07-05 03:45";
$result = nicetime($date); // 2 days ago
黑名单过滤
1 | function is_spam($text, $file, $split = ':', $regex = false){ |
输出:1
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4ab:3
dog:3
cat:2
monkey:2
随机颜色生成器
1 | function randomColor() { |
从网络下载文件
1 | set_time_limit(0); |
Alexa/Google Page Rank
1 | function page_rank($page, $type = 'alexa'){ |
强制下载文件
1 | $filename = $_GET['file']; //Get the fileid from the URL |
通过Email显示用户的Gravatar头像
1 | $gravatar_link = 'http://www.gravatar.com/avatar/' . md5($comment_author_email) . '?s=32'; |
通过cURL获取RSS订阅数
1 | $ch = curl_init(); |
时间差异计算函数
1 | function ago($time) |
裁剪图片
1 | $filename= "test.jpg"; |
检查网站是否宕机
1 | function Visit($url){ |