Share 10 sections of PHP common code _php instances

This article brings together 10 pieces of code commonly used in PHP development, including email, 64-bit encoding and decoding, decompression, 64-bit encoding, parsing json, and so on, hoping 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" Here's 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

3. Get 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 was a valid email. ';} Else{echo ' This was 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 ($xml _string);//loop through the E Ach node of Moleculeforeach ($xml-﹥molecule as $record) {//attribute is accessted by echo $record [' name '], ';//node ar e accessted by-﹥operator Echo $record-﹥symbol, "; echo $record-﹥code, ' ﹤br/﹥ ';}

7. Database connection

﹤?phpif (basename (__file__) = = basename ($_server[' php_self ')) send_404 (); $dbHost = "localhost"; Location of the Database usually its localhost$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", $db) or Die ("couldn ' t select the database."); # This function would send an imitation 404 page if the user# types in this files filename to the address bar.# only file  s connecting with in the same directory as this# file would be a able to use it as Well.function send_404 () {header (' http/1.x 404 Not Found '); print ' ﹤! DOCTYPE HTML PUBLIC "-//ietf//dtd HTML 2.0//en" ﹥ '. " N ". ' ﹤html﹥﹤head﹥ '. " N ". ' ﹤title﹥404 not Found﹤/title﹥ '. " N ". ' ﹤/head﹥﹤body﹥ '. " N ". ' ﹤h1﹥not Found﹤/h1﹥ '. N ". ' ﹤p﹥the requested URL '. Str_replace (strstr ($_server[' Request_uri '), '? '), ', $_server[' Request_uri ']). ' is not found in this Server.﹤/p﹥ '. " N. ' ﹤/body﹥﹤/html﹥ '. " n "; Exit;} # in any file, want to connect to the database,# and in this case we'll name this file db.php# just add the PHP code (without the pound sign): # include "db.php";? ﹥

8. Creating and parsing JSON data

$json _data = array (' ID ' =﹥1, ' name ' =﹥ ' Rolf ', ' country ' =﹥ ' Russia ', ' Office ' =﹥array ("Google", "Oracle"); Echo Json_ Encode ($json _data);

9. Processing MySQL Timestamp

$query = "Select Unix_timestamp (Date_field) as mydate from  mytable where 1=1", $records = mysql_query ($query) or Die (my Sql_error ()); while ($row = Mysql_fetch_array ($records)) {echo $row;}

10. Unzip 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 ';? ﹥

PHP common functions are as follows

1.PHP string

The string declares the variable = ' ' or ' (the general case uses single quotes because it is easier to write)

$str = ' Hello PHP ';
Echo $str;

Strpos to calculate the position of a character in a string (starting at 0)

$str = ' Hello PHP ';
Echo Strpos ($str, ' o '); Calculates the position of a character in a string
Echo '
';
Echo Strpos ($str, ' PH ');

SUBSTR Intercept string

$str = ' Hello PHP ';//intercept string $str1 = substr ($str, 2, 3); Intercept from 2 position, intercept string of length 3 echo $str 1;

If the length parameter is not passed, it will be truncated from the specified position to the end of the string.

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

$str = ' Hello PHP ';//split string $result = Str_split ($STR); Saves the result to an array of print_r ($result); Use Print_r to enter an array of echo '
'; $result 1 = Str_split ($STR, 2);p Rint_r ($result 1);

Explode (split character, string to be split) separated by space

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

Connection of strings

$str = ' Hello PHP Java C # C + + ';//String Connection $num = +, $str 1 = $str. '
Objective-c '. $num, echo $str 1;echo '
'; $str 2 = "$str
Objective-c $num "; Another easy way to do echo $str 2;

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