再来 10 个有用的 PHP 代码

http://www.learncomputer.com/10-useful-php-code-snippets/

1. function getRemoteIPAddress() {
2. $ip = $_SERVER['REMOTE_ADDR'];
3. return $ip;
4. }

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1. function getRealIPAddress() {
2. if (!empty($_SERVER['HTTP_CLIENT_IP'])) { // check ip from share internet
3. $ip = $_SERVER['HTTP_CLIENT_IP'];
4. } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { // to check ip is pass from proxy
5. $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
6. } else {
7. $ip = $_SERVER['REMOTE_ADDR'];
8. }
9. return $ip;
10. }

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1. $query = "select UNIX_TIMESTAMP(date_field) as mydate from mytable where 1=1";
2. $records = mysql_query($query) or die(mysql_error());
3. while($row = mysql_fetch_array($records)) {
4. echo $row;
5. }

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1. function checkDateFormat($date) {
2. // match the format of the date
3. if (preg_match("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts)) {
4. // check whether the date is valid of not
5. if (checkdate($parts[2], $parts[3], $parts[1])) {
6. return true;
7. } else {
8. return false;
9. }
10. } else {
11. return false;
12. }
13. }

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1. header('Location: http://www.oschina.net/project/zh');

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1. $to = "[e-mail]";
2. $subject = "Your Subject here";
3. $body = "Body of your message here you can use HTML too. e.g.
   Bold ";
4. $headers = "From: You\r\n";
5. $headers .= "Reply-To: [e-mail]\r\n";
6. $headers .= "Return-Path: [e-mail]\r\n";
7. $headers .= "X-Mailer: PHP\n";
8. $headers .= 'MIME-Version: 1.0' . "\n";
9. $headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
10. mail($to, $subject, $body, $headers);

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1. function base64url_encode($plainText) {
2. $base64 = base64_encode($plainText);
3. $base64url = strtr($base64, '+/=', '-_,');
4. return $base64url;
5. }
7. function base64url_decode($plainText) {
8. $base64url = strtr($plainText, '-_,', '+/=');
9. $base64 = base64_decode($base64url);
10. return $base64;
11. }

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1. $json_data = array ('id'=>1,'name'=>"John",'country'=>'Canada',"work"=>array("Google","Oracle"));
2. echo json_encode($json_data);
4. $json_string='{"id":1,"name":"John","country":"Canada","work":["Google","Oracle"]} ';
5. $obj=json_decode($json_string);
7. // print the parsed data
8. echo $obj->name; //displays John
9. echo $obj->work[0]; //displays Google

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1. $useragent = $_SERVER ['HTTP_USER_AGENT'];
2. echo "Your User Agent is: " . $useragent;

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1. $lines = file('http://www.oschina.net/home/about');
2. foreach ($lines as $line_num => $line) {
3. // loop thru each line and prepend line numbers
4. echo "Line #{$line_num} : " . htmlspecialchars($line) . "
   \n";
5. }

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1. $now = date('Y-m-d-G');
2. $now = strftime("%Y-%m-%d-%H", strtotime("$now -8 hours"));

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