56個PHP開發常用代碼片段（上） · TP5常用代碼

在編寫代碼的時候有個神奇的工具總是好的！下面這里收集了 50+ PHP 代碼片段，可以幫助你開發 PHP 項目。這些 PHP 片段對于 PHP 初學者也非常有幫助，非常容易學習，讓我們開始學習吧～ [TOC] ## 1、發送短信在開發Web或者移動應用程序的時候，經常遇到需要發送SMS給用戶，或者因為登錄原因，或者是為了發送信息。下面的PHP代碼就實現了發送SMS的功能。為了使用任何的語言發送SMS，需要一個短信網關。大部分的短信會提供一個API，這里是使用MSG91作為短信網關。 ``` 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“;”需要你輸入你的密碼“，$ senderId =”IKOONK“;”需要你輸入你的SenderID。當輸入移動號碼的時候需要指定國家代碼（比如，美國是1，印度是91）。語法： ``` ~~~ <?php $message = "Hello World"; $mobile = "918112998787"; send_sms($mobile,$message); ?> ~~~ ``` ## 2、使用 mandrill 發送郵件 Mandrill 是一款強大的 SMTP 提供器。開發者傾向于使用一個第三方 SMTP provider 來獲取更好的收件交付。下面的函數中，你需要把 “Mandrill.php” 放在同一個文件夾，作為 PHP 文件，這樣就可以使用TA來發送郵件。 ``` function send_email($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”這里需要你指定你的 API 密鑰（從 Mandrill 賬戶中獲得） ``` 語法： ``` ~~~ <?php $to = "abc@example.com"; $subject = "This is a test email"; $message = "Hello World!"; send_email($to,$subject,$message); ?> ~~~ ``` 為了達到最好的效果，最好按照 Mandrill 的教程去配置 DNS。 ## 3. PHP函數：阻止SQL注入 SQL 注入或者 SQLi 常見的攻擊網站的手段，使用下面的代碼可以幫助你防止這些工具。 ``` ~~~ 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; } ~~~ ``` 語法： ``` ~~~ <?php $text = "<script>alert(1)</script>"; $text = clean($text); echo $text; ?> ~~~ ``` ## 4. 檢測用戶位置使用下面的函數，可以檢測用戶是在哪個城市訪問你的網站 ``` ~~~ function detect_city($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; } } ~~~ ``` 語法： ``` ~~~ <?php $ip = $_SERVER['REMOTE_ADDR']; $city = detect_city($ip); echo $city; ?> ~~~ ``` ## 5. 獲取 Web 頁面的源代碼使用下面的函數，可以獲取任意 Web 頁面的 HTML 代碼 ``` ~~~ function display_sourcecode($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"; } } ~~~ ``` 語法： ``` ~~~ <?php $url = "http://blog.koonk.com"; $source = display_sourcecode($url); echo $source; ?> ~~~ ``` ## 6. 計算喜歡你的 Facebook 頁面的用戶 ``` ~~~ function fb_fan_count($facebook_name) { $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name)); $likes = $data->likes; return $likes; } ~~~ ``` 語法： ``` ~~~ <?php $page = "koonktechnologies"; $count = fb_fan_count($page); echo $count; ?> ~~~ ``` ## 7. 確定任意圖片的主導顏色 ``` ~~~ function dominant_color($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/$total); } ~~~ ``` ## 8. whois 查詢使用下面的函數可以獲取任何域名用戶的完整細節 ``` ~~~ function whois_query($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; } ~~~ ``` 語法： ``` ~~~ <?php $domain = "http://www.blog.koonk.com"; $result = whois_query($domain); print_r($result); ?> ~~~ ``` ## 9. 驗證郵箱地址有時候，當在網站填寫表單，用戶可能會輸入錯誤的郵箱地址，這個函數可以驗證郵箱地址是否有效。 ``` ~~~ function is_validemail($email) { $check = 0; if(filter_var($email,FILTER_VALIDATE_EMAIL)) { $check = 1; } return $check; } ~~~ ``` 語法： ``` ~~~ <?php $email = "blog@koonk.com"; $check = is_validemail($email); echo $check; // If the output is 1, then email is valid. ?> ~~~ ``` ## 10. 獲取用戶的真實 IP ``` ~~~ function getRealIpAddr() { if (!emptyempty($_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; } ~~~ ``` 語法： ``` ~~~ <?php $ip = getRealIpAddr(); echo $ip; ?> ~~~ ``` ## 11. 轉換 URL：從字符串變成超鏈接如果你正在開發論壇，博客或者是一個常規的表單提交，很多時候都要用戶訪問一個網站。使用這個函數，URL 字符串就可以自動的轉換為超鏈接。 ``` ~~~ function makeClickableLinks($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; } ~~~ ``` 語法： ``` ~~~ <?php $text = "This is my first post on http://blog.koonk.com"; $text = makeClickableLinks($text); echo $text; ?> ~~~ ``` ## 12. 阻止多個 IP 訪問你的網站這個代碼片段可以方便你禁止某些特定的 IP 地址訪問你的網站 ``` ~~~ 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. 強制性文件下載如果你需要下載特定的文件而不用另開新窗口，下面的代碼片段可以幫助你。 ``` ~~~ 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"; } } ~~~ ``` 語法： ``` ~~~ <php force_download("image.jpg"); ?> ~~~ ``` ## 14. 創建 JSON 數據使用下面的 PHP 片段可以創建 JSON 數據，可以方便你創建移動應用的 Web 服務 ``` ~~~ $json_data = array ('id'=>1,'name'=>"Mohit"); echo json_encode($json_data); ~~~ ``` ## 15. 壓縮 zip 文件使用下面的 PHP 片段可以即時壓縮 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; } } ~~~ ``` 語法： ``` ~~~ <?php $files=array('file1.jpg', 'file2.jpg', 'file3.gif'); create_zip($files, 'myzipfile.zip', true); ?> ~~~ ``` ## 16\. 解壓文件 ``` ~~~ 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.'/'.$file); } return TRUE; }else{ return FALSE; } } ~~~ ``` 語法： ``` ~~~ <?php unzip('test.zip','unziped/test'); //File would be unzipped in unziped/test folder ?> ~~~ ``` ## 17\. 縮放圖片 ``` ~~~ function resize_image($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 $im2; } ~~~ ``` ## 18\. 使用 mail() 發送郵件之前我們提供了如何使用 Mandrill 發送郵件的 PHP 代碼片段，但是如果你不想使用第三方服務，那么可以使用下面的 PHP 代碼片段。 ``` ~~~ function send_mail($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); } ~~~ ``` 語法： ``` ~~~ <?php $to = "admin@koonk.com"; $subject = "This is a test mail"; $body = "Hello World!"; send_mail($to,$subject,$body); ?> ~~~ ``` ## 19\. 把秒轉換成天數，小時數和分鐘 ``` ~~~ 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; } ~~~ ``` 語法： ``` ~~~ <?php $seconds = "56789"; $output = secsToStr($seconds); echo $output; ?> ~~~ ``` ## 原文閱讀 https://www.cnblogs.com/think-a-lot/p/8109981.html https://zz1.com.cn/275.html