[转]10 个有用的 PHP 代码

[代码] 获取浏览器IP地址

1	function getRemoteIPAddress() {

2	$ip = $_SERVER['REMOTE_ADDR'];

3	return $ip;

4

}

[代码] 如果有代理服务器的情况下获取IP

01	function getRealIPAddress() {

02	if (!empty($_SERVER['HTTP_CLIENT_IP'])) { // check ip from share internet

03	$ip = $_SERVER['HTTP_CLIENT_IP'];

04	} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { // to check ip is pass from proxy

05	$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];

06

} else {

07	$ip = $_SERVER['REMOTE_ADDR'];

08

}

09	return $ip;

10

}

[代码] 获取 MySQL 时间戳

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

}

[代码] 验证日期格式：YYYY-MM-DD

01	function checkDateFormat($date) {

02	// match the format of the date

03	if (preg_match("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts)) {

04	// check whether the date is valid of not

05	if (checkdate($parts[2], $parts[3], $parts[1])) {

06	return true;

07

} else {

08	return false;

09

}

10

} else {

11	return false;

12

}

13

}

[代码] 重定向

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

[代码] 发送邮件

01	$to = "[e-mail]";

02	$subject = "Your Subject here";

03	$body = "Body of your message here you can use HTML too. e.g. <br><b> Bold </b>";

04	$headers = "From: You\r\n";

05	$headers .= "Reply-To: [e-mail]\r\n";

06	$headers .= "Return-Path: [e-mail]\r\n";

07	$headers .= "X-Mailer: PHP\n";

08	$headers .= 'MIME-Version: 1.0' . "\n";

09	$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

10	mail($to, $subject, $body, $headers);

[代码] BASE64 编码和解码

01	function base64url_encode($plainText) {

02	$base64 = base64_encode($plainText);

03	$base64url = strtr($base64, '+/=', '-_,');

04	return $base64url;

05

}

06

07	function base64url_decode($plainText) {

08	$base64url = strtr($plainText, '-_,', '+/=');

09	$base64 = base64_decode($base64url);

10	return $base64;

11

}

[代码] JSON 处理

1	$json_data = array ('id'=>1,'name'=>"John",'country'=>'Canada',"work"=>array("Google","Oracle"));

2	echo json_encode($json_data);

3

4	$json_string='{"id":1,"name":"John","country":"Canada","work":["Google","Oracle"]} ';

5	$obj=json_decode($json_string);

6

7	// print the parsed data

8	echo $obj->name; //displays John

9	echo $obj->work[0]; //displays Google

[代码] 检测用户浏览器类型

1	$useragent = $_SERVER ['HTTP_USER_AGENT'];

2	echo "<b>Your User Agent is</b>: " . $useragent;

[代码] 显示网页源码

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 #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br>\n";

5

}

[代码] 调整服务器时间

1	$now = date('Y-m-d-G');

2	$now = strftime("%Y-%m-%d-%H", strtotime("$now -8 hours"));