Share 10 common PHP codes

This article collects time-frame code frequently used in PHP development, including Email, decompression, 64-bit encoding, and JSON parsing, if you are interested in common php code, refer to the following ten pieces of code frequently used in PHP development, including Email, 64-bit encoding and decoding, decompression, 64-bit encoding, and JSON parsing, hope to help you.

1. use the PHP Mail function to send an Email

$to = "viralpatel.net@gmail.com"; $subject = "VIRALPATEL.net"; $body = "Body of your message here you can use HTML too. e.g. ﹤br﹥ ﹤b﹥ Bold ﹤/b﹥"; $headers = "From: Peter\r\n"; $headers .= "Reply-To: info@yoursite.com\r\n"; $headers .= "Return-Path: info@yoursite.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); ?﹥

2. 64-bit encoding and decoding in PHP

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;} 

3. obtain the remote IP address

function getRealIPAddr(){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;}

4. Date formatting

function checkDateFormat($date){//match the format of the dateif (preg_match ("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts)){//check weather the date is valid of notif(checkdate($parts[2],$parts[3],$parts[1]))return true;elsereturn false;}elsereturn false;}

5. verify Email

$email = $_POST['email'];if(preg_match("~([a-zA-Z0-9!#$%&'*+-/=?^_`{|}~])@([a-zA-Z0-9-]).   ([a-zA-Z0-9]{2,4})~",$email)) {echo 'This is a valid email.';} else{echo 'This is an invalid email.';}

6. easily parse XML in PHP

//this is a sample xml string$xml_string="﹤?xml version='1.0'?﹥﹤moleculedb﹥ ﹤molecule name='Benzine'﹥ ﹤symbol﹥ben﹤/symbol﹥ ﹤code﹥A﹤/code﹥ ﹤/molecule﹥ ﹤molecule name='Water'﹥ ﹤symbol﹥h2o﹤/symbol﹥ ﹤code﹥K﹤/code﹥ ﹤/molecule﹥﹤/moleculedb﹥";//load the xml string using simplexml function$xml = simplexml_load_string($xml_string);//loop through the each node of moleculeforeach ($xml-﹥molecule as $record){ //attribute are accessted by echo $record['name'], ' '; //node are accessted by -﹥ operator echo $record-﹥symbol, ' '; echo $record-﹥code, '﹤br /﹥';}

7. database connection

﹤?phpif(basename(__FILE__) == basename($_SERVER['PHP_SELF'])) send_404();$dbHost = "localhost"; //Location Of Database usually its localhost$dbUser = "xxxx"; //Database User Name$dbPass = "xxxx"; //Database Password$dbDatabase = "xxxx"; //Database Name$db = mysql_connect("$dbHost", "$dbUser", "$dbPass") or    die ("Error connecting to database.");mysql_select_db("$dbDatabase", $db) or die ("Couldn't select the database.");# This function will send an imitation 404 page if the user# types in this files filename into the address bar.# only files connecting with in the same directory as this# file will be able to use it as well.function send_404(){ header('HTTP/1.x 404 Not Found'); print '﹤!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"﹥'."n". '﹤html﹥﹤head﹥'."n". '﹤title﹥404 Not Found﹤/title﹥'."n". '﹤/head﹥﹤body﹥'."n". '﹤h1﹥Not Found﹤/h1﹥'."n". '﹤p﹥The requested URL '. str_replace(strstr($_SERVER['REQUEST_URI'], '?'), '', $_SERVER['REQUEST_URI']). ' was not found on this server.﹤/p﹥'."n". '﹤/body﹥﹤/html﹥'."n"; exit;}# In any file you want to connect to the database,# and in this case we will name this file db.php# just add this line of php code (without the pound sign):# include"db.php";?﹥

8. create and parse JSON data

$json_data = array ('id'=﹥1,'name'=﹥"rolf",'country'=﹥'russia',"office"=﹥array("google","oracle"));echo json_encode($json_data);

9. process 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;}

10. decompress the Zip file

﹤?php 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; } }?﹥//Use the code as following:﹤?phpinclude 'functions.php';if(unzip('zipedfiles/test.zip','unziped/myNewZip')) echo 'Success!';else echo 'Error';?﹥

Common PHP functions are as follows:

1. PHP string

String declaration variable = ''or" "(single quotation marks are generally used, because it is easier to write)

$ Str = 'Hello php ';
Echo $ str;

Strpos calculates the position of a character in a string (starting from 0)

$ Str = 'Hello php ';
Echo strpos ($ str, 'o'); // calculates the position of the character in the string.
Echo'
';
Echo strpos ($ str, 'ph ');

Substr truncated string

$ Str = 'Hello php'; // capture string $ str1 = substr ($ str, 2, 3); // start from 2, truncate a string of 3 echo $ str1;

If the length parameter is not input, it is intercepted from the specified position until the end of the string.

Str_split: splits a string with a fixed length (the default length is 1)

$ Str = 'Hello php'; // The split string $ result = str_split ($ str); // Save the result to an array print_r ($ result ); // input an array echo using print_r'
'; $ Result1 = str_split ($ str, 2); print_r ($ result1 );

Explode (delimiter, string to be split) is separated by space

$str = 'Hello PHP Java C# C++';$result = explode(' ',$str);print_r($result);

String connection

$ Str = 'Hello PHP Java C # C ++ '; // string join $ num = 100; $ str1 = $ str .'
Objective-C '. $ num; echo $ str1; echo'
'; $ Str2 = "$ str
Objective-C $ num "; // A simple echo $ str2 statement;