10 Useful PHP code

Get the browser ip address functiongetRemoteIPAddress () {$ ip =$ _ SERVER [& amp; #39; REMOTE_ADDR & amp; #39;]; return $ ip ;} obtain IPfunctiongetRealIPAddress () {I

Get browser IP address

Function getRemoteIPAddress (){

$ Ip = $ _ SERVER ['remote _ ADDR '];

Return $ ip;

}

 

Obtain the IP address if a proxy server exists.

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;

}

 

Obtain the MySQL timestamp

$ 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;

}

 

Validation date format: 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;

}

}

 

Redirection

Header ('Location: http://www.php100.com ');

 

Send email

$ 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 encoding and decoding

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 processing

$ 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

 

Detect user browser types

$ Useragent = $ _ SERVER ['http _ USER_AGENT '];

Echo"Your User Agent is: ". $ Useragent;

 

Show webpage source code

$ Lines = file ('http: // www.php100.com/index.php ');

Foreach ($ lines as $ line_num => $ line ){

// Loop thru each line and prepend line numbers

Echo "Line #{$ Line_num}: ". Htmlspecialchars ($ line )."
\ N ";

}

 

Adjust server time

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

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