10个必看的PHP小代码，很实用！
获取浏览器IP地址
function getRemoteIPAddress() {
$ip = $_SERVER[\'REMOTE_ADDR\'];
return $ip;
}
如果有代理服务器的情况下获取IP
function getRealIPAddress() {
if (!empty($_SERVER[\'HTTP_CLIENT_IP\'])) { // check ip from share internet
$ip = $_SERVER[\'HTTP_CLIENT_IP\'];
} elseif (!empty($_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;
}
获取 MySQL 时间戳
$query = "select UNIX_TIMESTAMP(date_field) as mydate from mytable where 1=1";
$records = mysql_query($query) or die(mysql_error());
while($row = mysql_fetch_array($records)) {
echo $row;
}
验证日期格式：YYYY-MM-DD
function checkDateFormat($date) {
// match the format of the date
if (preg_match("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts)) {
// check whether the date is valid of not
if (checkdate($parts[2], $parts[3], $parts[1])) {
return true;
} else {
return false;
}
} else {
return false;
}
}
重定向
header(\'Location: http://www.phpchina.com\');
发送邮件
$to = "someone@oschina.net";
$subject = "Your Subject here";
$body = "Body of your message here you can use HTML too. e.g.
Bold ";
$headers = "From: You\r\n";
$headers .= "Reply-To: info@yoursite.com\r\n";
$headers .= "Return-Path: info@yoursite.com\r\n";
$headers .= "X-Mailer: PHP\n";
$headers .= \'MIME-Version: 1.0\' . "\n";
$headers .= \'Content-type: text/html; charset=iso-8859-1\' . "\r\n";
mail($to, $subject, $body, $headers);
BASE64 编码和解码
function base64url_encode($plainText) {
$base64 = base64_encode($plainText);
$base64url = strtr($base64, \'+/=\', \'-_,\');
return $base64url;
}
function base64url_decode($plainText) {
$base64url = strtr($plainText, \'-_,\', \'+/=\');
$base64 = base64_decode($base64url);
return $base64;
}
JSON 处理
$json_data = array (\'id\'=>1,\'name\'=>"John",\'country\'=>\'Canada\',"work"=>array("Google","Oracle"));
echo json_encode($json_data);
$json_string=\'{"id":1,"name":"John","country":"Canada","work":["Google","Oracle"]} \';
$obj=json_decode($json_string);
// print the parsed data
echo $obj->name; //displays John
echo $obj->work[0]; //displays Google
检测用户浏览器类型
$useragent = $_SERVER [\'HTTP_USER_AGENT\'];
echo "Your User Agent is: " . $useragent;
显示网页源码
$lines = file(\'http://www.phpchina.com/index.php\');
foreach ($lines as $line_num => $line) {
// loop thru each line and prepend line numbers
echo "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "<br>\n";
}
调整服务器时间
$now = date(\'Y-m-d-G\');
$now = strftime("%Y-%m-%d-%H", strtotime("$now -8 hours"));
