10 Frequently Used PHP Snippets_PHP Tutorial
1. Find the distance between Longitudes and Latitudes
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
function getDistanceBetweenPointsNew($latitude1,
$longitude1, $latitude2, $longitude2) {
$theta
= $longitude1 - $longitude2;
$miles
= (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));
$miles
= acos($miles);
$miles
= rad2deg($miles);
$miles
= $miles * 60 * 1.1515;
$feet
= $miles * 5280;
$yards
= $feet / 3;
$kilometers
= $miles * 1.609344;
$meters
= $kilometers * 1000;
return compact('miles','feet','yards','kilometers','meters');
}
$point1 = array('lat' =>
40.770623, 'long' => -73.964367);
$point2 = array('lat' =>
40.758224, 'long' => -73.917404);
$distance = getDistanceBetweenPointsNew($point1['lat'],
$point1['long'], $point2['lat'],
$point2['long']);
foreach ($distance as $unit => $value) {
echo
$unit.': '.number_format($value,4).'
';
}
The example returns the following:
miles: 2.6025
feet: 13,741.4350
yards: 4,580.4783
kilometers: 4.1884
meters: 4,188.3894
|
2. Improve cURL function
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 |
function xcurl($url,$ref=null,$post=array(),$ua="Mozilla/5.0
(X11; Linux x86_64; rv:2.2a1pre) Gecko/20110324 Firefox/4.2a1pre",$print=false)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
if(!empty($ref))
{
curl_setopt($ch, CURLOPT_REFERER, $ref);
}
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
if(!empty($ua))
{
curl_setopt($ch, CURLOPT_USERAGENT, $ua);
}
if(count($post)
> 0){
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
}
$output = curl_exec($ch);
curl_close($ch);
if($print)
{
print($output);
} else {
return $output;
}
}
|
3. Clean user input
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 |
]*?>.*?@si', // Strip out javascript
'@]*?>@si',
// Strip out HTML tags
'@]*?>.*?@siU',
// Strip style tags properly
'@@'
// Strip multi-line comments
);
$output = preg_replace($search, '',
$input);
return $output;
}
?>
$val) {
$output[$var]
= sanitize($val);
}
}
else {
if (get_magic_quotes_gpc())
{
$input = stripslashes($input);
}
$input = cleanInput($input);
$output = mysql_real_escape_string($input);
}
return $output;
}
?>
|
4. Detect geographical location through IP (city, country)
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 |
function detect_city($ip)
{
$default = 'Hollywood,
CA';
if (!is_string($ip)
|| strlen($ip) <code class="js string">'127.0.0.1' ||
$ip == 'localhost') $ip = '8.8.8.8';
$curlopt_useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)';
$url = 'http://ipinfodb.com/ip_locator.php?ip=' .
urlencode($ip); $ch = curl_init(); $curl_opt = array( CURLOPT_FOLLOWLOCATION => 1,
CURLOPT_HEADER => 0,
CURLOPT_RETURNTRANSFER => 1,
CURLOPT_USERAGENT => $curlopt_useragent,
CURLOPT_URL => $url,
CURLOPT_TIMEOUT => 1,
CURLOPT_REFERER => 'http://' .
$_SERVER['HTTP_HOST'],
);
curl_setopt_array($ch, $curl_opt);
$content = curl_exec($ch);
if (!is_null($curl_info))
{
$curl_info = curl_getinfo($ch);
}
curl_close($ch);
if (
preg_match('{
City : ([^
<code class="js string">}i', $content, $regs) ) { $city = $regs[1]; } if (
preg_match('{
State/Province : ([^
<code class="js string">}i', $content, $regs) ) { $state = $regs[1]; } if(
$city!='' && $state!='' ){
$location = $city . ', ' . $state; return $location;
}else{ return $default;
} }
|
5. Set password strength
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
100){
$strength = 100;
}
return $strength;
}
var_dump(password_strength("Correct Horse Battery
Staple"));
echo "
";
var_dump(password_strength("Super Monkey Ball"));
echo "
";
var_dump(password_strength("Tr0ub4dor&3"));
echo "
";
var_dump(password_strength("abc123"));
echo "
";
var_dump(password_strength("sweet"));
|
6. Detect browser language and only provide available $availableLanguages as array (‘en’, ‘de’, ‘es’)
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
function get_client_language($availableLanguages,
$default='en'){
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
{
$langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);
//start going through each one
foreach ($langs as $value){
$choice=substr($value,0,2);
if(in_array($choice,
$availableLanguages)){
return $choice;
}
}
}
return $default;
}
|
7. Create data URL
| 1 2 3 4 5 |
function data_uri($file,
$mime) {
$contents=file_get_contents($file);
$base64=base64_encode($contents);
echo "data:$mime;base64,$base64";
}
|
8. Create a more friendly page title SEO URL Input example: $title = “This foo’s bar is rockin’ cool!”; echo makeseoname($title); //RETURNS: //this-foos-bar-is-rockin-cool
| 1 2 3 |
function make_seo_name($title)
{
return preg_replace('/[^a-z0-9_-]/i', '',
strtolower(str_replace(' ', '-',
trim($title))));
}
|
9. Ultimate Encryption Features
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
// f(ucking) u(ncrackable) e(ncryption) function by BlackHatDBL (www.netforme.net)
function fue($hash,$times)
{
// Execute the encryption(s) as many times as the user
wants
for($i=$times;$i>0;$i--)
{
// Encode with base64...
$hash=base64_encode($hash);
// and md5...
$hash=md5($hash);
// sha1...
$hash=sha1($hash);
// sha256... (one more)
$hash=hash("sha256",
$hash);
// sha512
$hash=hash("sha512",
$hash);
}
// Finaly, when done, return the value
return $hash;
}
|
10a.Tweeter Feed Runner - Use any twitter name to load user resources on any page.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
pversion;
}
public function loadTimeline($user,
$max = 20){
$this->twitURL
.= 'statuses/user_timeline.xml?screen_name='.$user.'&count='.$max;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->twitURL);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$this->xml
= curl_exec($ch);
return $this;
}
public function getTweets(){
$this->twitterArr
= $this->getTimelineArray();
$tweets = array();
foreach($this->twitterArr->status
as $status){
$tweets[$status->created_at->__toString()] = $status->text->__toString();
}
return $tweets;
}
public function getTimelineArray(){
return simplexml_load_string($this->xml);
}
public function formatTweet($tweet){
$tweet = preg_replace("/(http(.+?))(
|$)/","",
$tweet);
$tweet = preg_replace("/#(.+?)(h|W|$)/", "#",
$tweet);
$tweet = preg_replace("/@(.+?)(h|W|$)/", "@",
$tweet);
return $tweet;
}
}
|
| 1 2 3 4 |
loadTimeline("phpsnips")->getTweets();
foreach($feed as $time => $message){
echo ";
}
|
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1659
14
1415
52
1309
25
1257
29
1231
24
How does session hijacking work and how can you mitigate it in PHP?
Apr 06, 2025 am 12:02 AM
Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.
Explain different error types in PHP (Notice, Warning, Fatal Error, Parse Error).
Apr 08, 2025 am 12:03 AM
There are four main error types in PHP: 1.Notice: the slightest, will not interrupt the program, such as accessing undefined variables; 2. Warning: serious than Notice, will not terminate the program, such as containing no files; 3. FatalError: the most serious, will terminate the program, such as calling no function; 4. ParseError: syntax error, will prevent the program from being executed, such as forgetting to add the end tag.
What are HTTP request methods (GET, POST, PUT, DELETE, etc.) and when should each be used?
Apr 09, 2025 am 12:09 AM
HTTP request methods include GET, POST, PUT and DELETE, which are used to obtain, submit, update and delete resources respectively. 1. The GET method is used to obtain resources and is suitable for read operations. 2. The POST method is used to submit data and is often used to create new resources. 3. The PUT method is used to update resources and is suitable for complete updates. 4. The DELETE method is used to delete resources and is suitable for deletion operations.
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?
Apr 17, 2025 am 12:06 AM
In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
Explain Arrow Functions (short closures) introduced in PHP 7.4.
Apr 06, 2025 am 12:01 AM
The arrow function was introduced in PHP7.4 and is a simplified form of short closures. 1) They are defined using the => operator, omitting function and use keywords. 2) The arrow function automatically captures the current scope variable without the use keyword. 3) They are often used in callback functions and short calculations to improve code simplicity and readability.
PHP in Action: Real-World Examples and Applications
Apr 14, 2025 am 12:19 AM
PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.
