Share 10 sections of PHP common code _php Instance

This article brings together 10 pieces of code that are often used in PHP development, including email, 64-bit encoding and decoding, decompression, 64-bit encoding, parsing json, and so on, and I hope to help you.

1, use the PHP mail function to send email

$to = "viralpatel.net@gmail.com"; 
$subject = "Viralpatel.net"; 
$body = "Body of your message is here for 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, PHP 64-bit coding and decoding

function Base64url_encode ($plainText) {
$base) = Base64_encode ($plainText);
$base 64url = STRTR ($base, ' +/= ', '-_, ');
return $base 64url;
}
function Base64url_decode ($plainText) {
$base 64url = STRTR ($plainText, '-_, ', ' +/= ');
$base = Base64_decode ($base 64url);
return $base 64;

3. Get 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 format

function Checkdateformat ($date)
{
//match the format of the date
if (Preg_match/^ ([0-9]{4})-([0-9]{2})- ([0-9]{2}) $/", $date, $parts))
{
//check weather the date is valid to not
if (Checkdate ($parts [2], $parts [3], $parts [1])) return
true;
else return
false;
else return
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 ' is a valid email.]
else{
Echo ' is a invalid email. '
}

6. Parse XML easily 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﹥ ";
The load the XML string using SimpleXML function
$xml = simplexml_load_string ($xml _string);
Loop through the each node of molecule
foreach ($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

﹤?php if (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", $db) or Die ("couldn ' t select the database.");
# This function would send an imitation 404 page if the user # types in this files to the address bar.
# only files, connecting with the same directory as this # file ' would be able to ' use it as a.
 function send_404 () {header (' http/1.x 404 Not Found '); print ' ﹤! DOCTYPE HTML PUBLIC "-//ietf//dtd HTML 2.0//en" ﹥ '. "
 N ". ' ﹤html﹥﹤head﹥ '.
 N ". ' ﹤title﹥404 not Found﹤/title﹥ '.
 N ". ' ﹤/head﹥﹤body﹥ '.
 N ". ' ﹤h1﹥not Found﹤/h1﹥ '.
 N ".
 ' ﹤p﹥the requested URL '.
 Str_replace (strstr ($_server[' Request_uri '], '? '), ', $_server[' Request_uri ']). ' is not foundOn this server.﹤/p﹥ '. '
 N ". ' ﹤/body﹥﹤/html﹥ '.
 n ";
Exit  # in any file with want to connect to the database, # and in this case we'll 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, processing MySQL time stamp

$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. Extract 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:
﹤?php
include ' functions.php ';
if (Unzip (' Zipedfiles/test.zip ', ' Unziped/mynewzip '))
 echo ' success! ';
else
 echo ' Error ';
? ﹥

PHP common functions are as follows

1.PHP string

The string declares the variable = ' or ' (usually using single quotes 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 a character in a string
Echo ' <br/> ';
Echo Strpos ($str, ' PH ');

SUBSTR Intercept string

$str = ' Hello PHP ';
Intercept string
$str 1 = substr ($str, 2, 3);//intercept from 2-bit, intercept string
echo $str 3 with length 1;

If the length parameter is not passed in, it is intercepted from the specified position to the end of the string

Str_split split string fixed-length segmentation (default length is 1)

$str = ' Hello PHP ';
Split string
$result = Str_split ($STR);//Save the result to an array
print_r ($result);//Use Print_r to enter an array of
echo ' <br/> ' ;
$result 1 = str_split ($STR, 2);
Print_r ($result 1);

Explode (split character, string to be split) split by Space

$str = ' Hello PHP Java C # C + + ';
$result = Explode (", $str);
Print_r ($result);

Connection of strings

$str = ' Hello PHP Java C # C + + ';
The connection of the string
$num =;
$str 1 = $str. ' <br/>objective-c '. $num;
echo $str 1;
Echo ' <br/> ';
$str 2 = "$str <br/>objective-c $num"; Another simple method of writing
echo $str 2;