Code hay dùng nhất trong Lập trình PHP các bạn nên tham khảo.
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| PHP, Lập tình web với PHP& MySQL |
Code 1.Send Mail using mail function in PHP
$to = "php.niit@gmail.com";
$subject = "php.niit";
$body = "Body of your message here you can use HTML too. e.g.
<br> <b> Bold </b>";
$headers = "From: Peter";
$headers .= "Reply-To: info@yoursite.com";
$headers .= "Return-Path: 'mailto:info@yoursite.com
$headers .= "X-Mailer:
PHP5";
$headers .= 'MIME-Version: 1.0' . "";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "";
mail($to,$subject,$body,$headers);
?>
Code 2.Base64 Encode and Decode String in PHP
function base64url_encode($plainText) {
$base64 = base64_encode($plainText);
$base64url = strtr($base64, '+/=', '-_,');
return $base64url;
}
function base64url_decode($plainText) {
$base64url = strtr($plainText, '-_,', '+/=');
$base64 = base64_decode($base64url);
return $base64;
}
Code 3.Get Remote IP Address in PHP
function getRemoteIPAddress() {
$ip = $_SERVER['REMOTE_ADDR'];
return $ip;
}
nếu người truy cập web cố tình dấu địa chỉ ip này bằng proxy thì sử dụng code sau :
function getRealIPAddr()
{
if (!empty($_SERVER['HTTP_CLIENT_IP'])) //check ip from {
$ip=$_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 $ip;
}
Code 4. Seconds to String
function secsToStr($secs) {
if($secs>=86400){$days=floor($secs/86400);$secs=$secs%86400;
$r=$days.' day';
if($days<>1){$r.='s';}if($secs>0){$r.=', ';}}
if($secs>=3600){$hours=floor($secs/3600);$secs=$secs%3600;
$r.=$hours.' hour';
if($hours<>1){$r.='s';}if($secs>0){$r.=', ';}}
if($secs>=60){$minutes=floor($secs/60);$secs=$secs%60;
$r.=$minutes.' minute';
if($minutes<>1){$r.='s';}if($secs>0){$r.=', ';}}
$r.=$secs.' second';if($secs<>1){$r.='s';}
return $r;
}
Code 5. Email validation snippet in PHP
$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.';
}
Code 6. Parsing XML in easy way using 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 molecule
foreach ($xml->molecule as $record)
{
//attribute are accessted by
echo $record['name'], ' ';
//node are accessted by -> operator
echo $record->symbol, ' ';
echo $record->code, '<br />';
}
Code 7. Database Connection in PHP
<?php
if(basename(__FILE__) == basename($_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", $db)
or die ("Couldn't select the database.");
# This function will send an imitation 404 page if the user
# types in this files filename into the address bar.
# only files connecting with in the same directory as this
# file will be able to use it as well.
function send_404()
{
header('HTTP/1.x 404 Not Found');
print '<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">'."n".
'<html><head>'."n".
'<title>404 Not Found</title>'."n".
'</head><body>'."n".
'<h1>Not Found</h1>'."n".
'<p>The requested URL '.
str_replace(strstr($_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";
?>
Code 8. Creating and Parsing JSON data in PHP
$json_data = array ('id'=>1,'name'=>"rolf",'country'=>'russia',
"office"=>array("google","oracle"));
echo json_encode($json_data);
sử dụng mảng
$json_string='{"id":1,"name":"rolf","country":"russia","office":
["google","oracle"]} ';
$obj=json_decode($json_string);
//print the parsed data
echo $obj->name; //displays rolf
echo $obj->office[0]; //displays google
Code 9. Process MySQL Timestamp in PHP
$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;
}
Code 10. Generate An Authentication Code in PHP
<?php
# This particular code will generate a random string
# that is 25 charicters long 25 comes from the number
# that is in the for loop
$string = "abcdefghijklmnopqrstuvwxyz0123456789";
for($i=0;$i<25;$i++){
$pos = rand(0,36);
$str .= $string{$pos};
}
echo $str;
# If you have a database you can save the string in
# there, and send the user an email with the code in
# it they then can click a link or copy the code
# and you can then verify that that is the correct email
# or verify what ever you want to verify
?>
Code 11. Date format validation in PHP
function checkDateFormat($date)
{
//match the format of the date
if (preg_match ("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/",
$date, $parts))
{
//check weather the date is valid of not
if(checkdate($parts[2],$parts[3],$parts[1]))
return true;
else
return false;
}
else
return false;
}
Code 12. HTTP Redirection in PHP
<?php
header('Location: 'http://you_stuff/url.php'); ?>
Code 13. Directory Listing in PHP
<?php
function list_files($dir)
{
if(is_dir($dir))
{
if($handle = opendir($dir))
{
while(($file = readdir($handle)) !== false)
{
if($file != "." && $file != ".." &&
$file != "Thumbs.db"/*pesky windows, images..*/)
{
echo '<a target="_blank" href="'.$dir.$file.'">
'.$file.'</a><br>'."";
}
}
closedir($handle);
}
}
}
/*
To use:
<?php
list_files("images/");
?>
*/
?>
Code 14.Browser Detection script in PHP
<?php
$useragent = $_SERVER ['HTTP_USER_AGENT'];
echo "<b>Your User Agent is</b>: " . $useragent;
?>
Code 15. Unzip a Zip File
<?php
function unzip($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';
?>
Với 15 code PHP trên hy vọng sẽ đem lại cho các bạn những ý tưởng mới khi lập trình website
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