mirror of
https://github.com/namibia/awesome-cheatsheets.git
synced 2024-12-22 10:08:54 +00:00
561 lines
14 KiB
PHP
561 lines
14 KiB
PHP
<?php
|
|
|
|
// Exit the file, string inside get's echo'ed
|
|
die("This file is not ment to be ran. ¯\_(ツ)_/¯");
|
|
exit("This file is not ment to be ran. ¯\_(ツ)_/¯");
|
|
|
|
/**
|
|
* Printing
|
|
*/
|
|
echo ""; // Print a string or type that can be made into a string(I.E int, float).
|
|
print_r($arr); // Print anything, with type hints for array's and object's
|
|
var_dump($arr); // Print anything, with type hints for any value and sizes
|
|
|
|
/**
|
|
* Usefull string manipulation methods
|
|
*/
|
|
$string = 'Awesome cheatsheets';
|
|
|
|
str_contains($string, 'cheat'); // Find if the string contains the specified string (PHP >= 8.0)
|
|
str_replace('Awesome', 'Bonjour', $string); // Replace all occurence (PHP >= 8.0)
|
|
strcmp($string, 'Awesome cheatsheets'); // Compare two strings
|
|
strpos($string, 'a', 0); // Get position in the string
|
|
str_split($string, 2); // Split the string
|
|
strrev($string); // Reverse a string
|
|
trim($string); // Strip whitespace from the beginning and end of a string
|
|
ucfirst($string); // Make a string's first character uppercase
|
|
lcfirst($string); // Make a string's first character lowercase
|
|
substr($string, 0, 4); // Return part of a string
|
|
|
|
/**
|
|
* Declaring an Array
|
|
*/
|
|
|
|
// Indexed Array
|
|
$arr = array("John", "Doe", "Lorem", "Ipsum");
|
|
|
|
// Associative Array
|
|
$arr = array("John"=>"10", "Doe"=>"200", "Doe"=>"3000", "Ipsum"=>"40000");
|
|
|
|
// Multidimensional Arrays
|
|
$arr = array (
|
|
array("John",100,180),
|
|
array("Doe",150,130),
|
|
array("Lorem",500,200),
|
|
array("Ipsum",170,150)
|
|
);
|
|
|
|
// Declaring array with short syntax
|
|
$arr = ["John", "Doe", "Lorem", "Ipsum"]; // Indexed Array
|
|
$arr = ["John"=>"10", "Doe"=>"200", "Doe"=>"3000", "Ipsum"=>"40000"]; // Associative Array
|
|
$arr = [
|
|
["John",100,180],
|
|
["Doe",150,130],
|
|
["Lorem",500,200],
|
|
["Ipsum",170,150], // You can have a "," at the end without throwing syntax errors
|
|
];
|
|
|
|
/**
|
|
* Sorting an Array
|
|
*/
|
|
sort($arr); // Sort arrays in ascending order.
|
|
rsort($arr); // Sort arrays in descending order.
|
|
asort($arr); // Sort associative arrays in ascending order, according to the value.
|
|
ksort($arr); // Sort associative arrays in ascending order, according to the key.
|
|
arsort($arr); // Sort associative arrays in descending order, according to the value.
|
|
krsort($arr); // Sort associative arrays in descending order, according to the key.
|
|
|
|
/**
|
|
* Ways of looping
|
|
*/
|
|
continue; // Skip current iter
|
|
break; // Exit loop
|
|
|
|
// Foreach
|
|
foreach($arr as $key => $value) {
|
|
$key = $key;
|
|
$value = $value;
|
|
}
|
|
|
|
// For
|
|
for($i = 0; $i < count($arr); $i++) {
|
|
$key = $i;
|
|
$value = $arr[$i];
|
|
}
|
|
|
|
// While
|
|
$i = 0;
|
|
while($i < count($arr) - 1) {
|
|
$key = $i;
|
|
$value = $arr[$i];
|
|
}
|
|
|
|
// Do while
|
|
$i = 0;
|
|
do {
|
|
$key = $i;
|
|
$value = $arr[$i];
|
|
} while($i < count($arr));
|
|
|
|
// Switch
|
|
switch($arr) {
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
break;
|
|
case 3:
|
|
break;
|
|
default:
|
|
}
|
|
|
|
/**
|
|
* Match (PHP >= 8.0)
|
|
* https://www.php.net/manual/fr/control-structures.match.php
|
|
*/
|
|
$food = 'apple';
|
|
$return_value = match($food) {
|
|
'apple', 'appel' => 'An apple',
|
|
'banana' => 'A banana',
|
|
'applepie' => 'An applepie',
|
|
default => 'A fruit'
|
|
};
|
|
|
|
//You can also use it as a conditionnal and throw exceptions
|
|
$str = 'Welcome to awesome cheatsheets';
|
|
$return_value = match(true) {
|
|
str_contains($str, 'Welcome') && str_contains($str ,'to') => 'en-EN',
|
|
str_contains($str, 'Bonjour') && str_contains($str, 'sur') => 'fr-FR',
|
|
default => throw new Exception('Not a recognized language')
|
|
};
|
|
|
|
/**
|
|
* Global variables
|
|
* http://php.net/manual/en/language.variables.superglobals.php
|
|
*/
|
|
$_SERVER; // SERVER variables
|
|
$_GET; // Query params
|
|
$_POST; // Post fields
|
|
$_REQUEST; // GET and POST together
|
|
$GLOBALS; // Array of global variables
|
|
$_SESSION; // Browser session
|
|
$_FILES; // Array of files that are sent in request
|
|
$_COOKIE; // Array of cookies sent in request
|
|
$_ENV; // php.ini options
|
|
$argv; // Array of terminal arguments (filename included)
|
|
$argc; // Number of arguments passed into terminal
|
|
|
|
/**
|
|
* Class
|
|
* http://php.net/manual/en/language.oop5.basic.php
|
|
*/
|
|
class NormalClass extends AbstractClassName implements InterfaceName
|
|
{
|
|
|
|
use TraitName;
|
|
|
|
// --> PROPERTY TYPES <--
|
|
|
|
/**
|
|
* Public property, everyone can access this property.
|
|
* @var Type
|
|
*/
|
|
public $property;
|
|
|
|
/**
|
|
* Private property, only this instance can access this property.
|
|
* @var Type
|
|
*/
|
|
private $property;
|
|
|
|
/**
|
|
* Protected property, this instance and childs can access this property.
|
|
* @var Type
|
|
*/
|
|
protected $property;
|
|
|
|
/**
|
|
* Static property, is the same for all instances of this class.
|
|
* @var Type
|
|
*/
|
|
static $property;
|
|
|
|
// --> FUNCTION TYPES <--
|
|
|
|
/**
|
|
* Public function, everyone can access this function.
|
|
* @param Type
|
|
* @return Type
|
|
*/
|
|
public function publicFunction(Type $var = null): Type
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Private function, only this instance can access this function.
|
|
* @param Type
|
|
* @return Type
|
|
*/
|
|
private function privateFunction(Type $var = null): Type
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Protected function, this instance and childs can access this function.
|
|
* @param Type
|
|
* @return Type
|
|
*/
|
|
protected function protectedFunction(Type $var = null): Type
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Static function, doesn't need an instance to be executed.
|
|
* @param Type
|
|
* @return Type
|
|
*/
|
|
public static function staticFunction(Type $var = null): Type
|
|
{
|
|
}
|
|
|
|
// --> MAGIC METHODS <--
|
|
|
|
/**
|
|
* Gets triggered on creating a new class instance
|
|
* http://php.net/manual/en/language.oop5.decon.php
|
|
* @param Type
|
|
* @return void
|
|
*/
|
|
public function __construct(Type $var = null)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* Gets triggered on destruction of a class instance
|
|
* http://php.net/manual/en/language.oop5.decon.php
|
|
* @return void
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* __set() is run when writing data to inaccessible properties.
|
|
* http://php.net/manual/en/language.oop5.overloading.php
|
|
* @param string name
|
|
* @param mixed value
|
|
* @return void
|
|
*/
|
|
public function __set(string $name , mixed $value)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* __get() is utilized for reading data from inaccessible properties.
|
|
* http://php.net/manual/en/language.oop5.overloading.php
|
|
* @param string name
|
|
* @return mixed
|
|
*/
|
|
public function __get(string $name)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* __isset() is triggered by calling isset() or empty() on inaccessible properties.
|
|
* http://php.net/manual/en/language.oop5.overloading.php
|
|
* @param string name
|
|
* @return bool
|
|
*/
|
|
public function __isset(string $name)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* __unset() is invoked when unset() is used on inaccessible properties.
|
|
* http://php.net/manual/en/language.oop5.overloading.php
|
|
* @param string name
|
|
* @return void
|
|
*/
|
|
public function __unset(string $name)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* __call is triggered when invoking inaccessible methods in an object context.
|
|
* http://php.net/manual/en/language.oop5.overloading.php
|
|
* @param string name
|
|
* @param array arguments
|
|
* @return mixed
|
|
*/
|
|
public function __call(string $name, array $arguments)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* __callStatic() is triggered when invoking inaccessible methods in a static context.
|
|
* http://php.net/manual/en/language.oop5.overloading.php
|
|
* @param string name
|
|
* @param array arguments
|
|
* @return mixed
|
|
*/
|
|
public static function __callStatic(string $name, array $arguments)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* http://php.net/manual/en/language.oop5.magic.php
|
|
* @return array
|
|
*/
|
|
public function __sleep()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* http://php.net/manual/en/language.oop5.magic.php
|
|
* @return void
|
|
*/
|
|
public function __wakeup()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* http://php.net/manual/en/language.oop5.magic.php
|
|
* @return string
|
|
*/
|
|
public function __toString()
|
|
{
|
|
}
|
|
|
|
/**
|
|
* http://php.net/manual/en/language.oop5.magic.php
|
|
* @param Type
|
|
* @return mixed
|
|
*/
|
|
public function __invoke(Type $var = null)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* http://php.net/manual/en/language.oop5.magic.php
|
|
* @param array properties
|
|
* @return object
|
|
*/
|
|
public static function __set_state(array $properties)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* http://php.net/manual/en/language.oop5.magic.php
|
|
* @return array
|
|
*/
|
|
public function __debugInfo()
|
|
{
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Every class that has implemented this interface need to have the same functions.
|
|
*/
|
|
interface InterfaceName
|
|
{
|
|
|
|
public function FunctionName(Type $var = null): Type;
|
|
|
|
}
|
|
|
|
/**
|
|
* Combination of class and interface.
|
|
*/
|
|
abstract class AbstractClassName
|
|
{
|
|
|
|
/**
|
|
* Classes extending this abstract class need to have this function.
|
|
* @param Type
|
|
* @return Type
|
|
*/
|
|
abstract function abstractFunction(Type $var = null): Type;
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* Basic Implementation of LoggerAwareInterface.
|
|
* @see https://github.com/php-fig/log/blob/master/Psr/Log/LoggerAwareTrait.php
|
|
*/
|
|
trait LoggerAwareTrait
|
|
{
|
|
/**
|
|
* The logger instance.
|
|
*
|
|
* @var LoggerInterface
|
|
*/
|
|
protected $logger;
|
|
/**
|
|
* Sets a logger.
|
|
*
|
|
* @param LoggerInterface $logger
|
|
*/
|
|
public function setLogger(LoggerInterface $logger)
|
|
{
|
|
$this->logger = $logger;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Example with use of LoggerAwareTrait.
|
|
*/
|
|
class ClassWithLogger
|
|
{
|
|
/**
|
|
* Use the LoggerAwareTrait in this class.
|
|
*/
|
|
use LoggerAwareTrait;
|
|
}
|
|
|
|
|
|
/**
|
|
* Enums (PHP >=8.1)
|
|
* https://www.php.net/manual/fr/language.types.enumerations.php
|
|
*/
|
|
|
|
interface StateCode {
|
|
public function stateCode() : int;
|
|
}
|
|
|
|
enum States implements StateCode {
|
|
case Running;
|
|
case Stopped;
|
|
|
|
public function stateCode() : int {
|
|
return match($this) {
|
|
State::Running => '444',
|
|
State::Stopped => '666'
|
|
};
|
|
}
|
|
}
|
|
|
|
/**
|
|
* You can also declare backed Enums
|
|
*/
|
|
enum States : int implements StateCode {
|
|
case Running = 1;
|
|
case Stopped = 0;
|
|
|
|
public function stateCode() : int {
|
|
return match($this) {
|
|
State::Running => '444',
|
|
State::Stopped => '666'
|
|
};
|
|
}
|
|
}
|
|
|
|
/** Enums can be use as a type */
|
|
function notify(State $state) {
|
|
// ...
|
|
}
|
|
notify(State::Running);
|
|
|
|
/**
|
|
* PHP Regex.
|
|
*/
|
|
|
|
// Meta Characters.
|
|
|
|
^ Start of subject (or line in multiline mode)
|
|
$ End of subject (or line in multiline mode)
|
|
[ Start character class definition
|
|
] End character class definition
|
|
| Alternates, eg (a|b) matches a or b
|
|
( Start subpattern
|
|
) End subpattern
|
|
\ Escape character
|
|
|
|
// Pattern Modifiers.
|
|
|
|
i Caseless - ignore case
|
|
m Multiline mode - ^ and $ match start and end of lines
|
|
s Dotall - . class includes newline
|
|
x Extended- comments & whitespace
|
|
e preg_replace only - enables evaluation of replacement as PHP code
|
|
S Extra analysis of pattern
|
|
U Pattern is ungreedy
|
|
u Pattern is treated as UTF-8
|
|
|
|
// Subpattern Modifiers & Assertions.
|
|
(?:) Non capturing subpattern ((?:foo|fu)bar) matches foobar or fubar without foo or fu appearing as a captured subpattern
|
|
(?=) Positive look ahead assertion foo(?=bar) matches foo when followed by bar
|
|
(?!) Negative look ahead assertion foo(?!bar) matches foo when not followed by bar
|
|
(?<=) Positive look behind assertion (?<=foo)bar matches bar when preceded by foo
|
|
(?<!) Negative look behind assertion (?<!foo)bar matches bar when not preceded by foo
|
|
(?>) Once-only subpatterns (?>\d+)bar Performance enhancing when bar not present
|
|
(?(x)) Conditional subpatterns (?(3)foo|fu)bar Matches foo if 3rd subpattern has matched, fu if not
|
|
(?#) Comment (?# Pattern does x y or z)
|
|
|
|
// Base Character Classes
|
|
\w Any "word" character (a-z 0-9 _)
|
|
\W Any non "word" character
|
|
\s Whitespace (space, tab CRLF)
|
|
\S Any non whitepsace character
|
|
\d Digits (0-9)
|
|
\D Any non digit character
|
|
. (Period) - Any character except newline
|
|
|
|
// Multiplicity.
|
|
n* Zero or more of n
|
|
n+ One or more of n
|
|
n? Zero or one occurrences of n
|
|
{n} n occurrences exactly
|
|
{n,} At least n occurrences
|
|
{,m} At most m occurrences
|
|
{n,m} Between n and m occurrences (inclusive)
|
|
|
|
|
|
// PHP Regular Expression Functions.
|
|
|
|
Function Description
|
|
preg_match() The preg_match() function searches string for pattern, returning true if pattern exists, and false otherwise.
|
|
preg_match_all() The preg_match_all() function matches all occurrences of pattern in string. Useful for search and replace.
|
|
preg_replace() The preg_replace() function operates just like ereg_replace(), except that regular expressions can be used in the pattern and replacement input parameters.
|
|
preg_split() Preg Split (preg_split()) operates exactly like the split() function, except that regular expressions are accepted as input parameters.
|
|
preg_grep() The preg_grep() function searches all elements of input_array, returning all elements matching the regex pattern within a string.
|
|
preg_ quote() Quote regular expression characters
|
|
|
|
// Code Snippets.
|
|
|
|
//A better solution for validate email syntax is using filter_var.
|
|
if (filter_var('test+email@fexample.com', FILTER_VALIDATE_EMAIL)) {
|
|
echo "Your email is ok.";
|
|
} else {
|
|
echo "Wrong email address format.";
|
|
}
|
|
|
|
//Validate username, consist of alpha-numeric (a-z, A-Z, 0-9), underscores, and has minimum 5 character and maximum 20 character.
|
|
//You could change the minimum character and maximum character to any number you like.
|
|
$username = "user_name12";
|
|
if (preg_match('/^[a-z\d_]{5,20}$/i', $username)) {
|
|
echo "Your username is ok.";
|
|
} else {
|
|
echo "Wrong username format.";
|
|
}
|
|
|
|
//Validate domain
|
|
$url = "http://domain-name.com/";
|
|
if (preg_match('/^(http|https|ftp):\/\/([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+):?(\d+)?\/?/i', $url)) {
|
|
echo "Your url is ok.";
|
|
} else {
|
|
echo "Wrong url.";
|
|
}
|
|
|
|
//Extract domain name from certain URL
|
|
$url = "http://domain-name.com/index.html";
|
|
preg_match('@^(?:http://)?([^/]+)@i', $url, $matches);
|
|
$host = $matches[1];
|
|
echo $host; // domain-name.com
|
|
|
|
//Highlight a word in the content
|
|
$text = "A regular expression (shortened as regex) is a sequence of characters that define a search pattern. Usually such patterns are used by string-searching algorithms for 'find' or 'find and replace' operations on strings, or for input validation.";
|
|
$text = preg_replace("/\b(regex)\b/i", 'replaced content', $text);
|
|
echo $text; /*A regular expression (shortened as replaced content) is a sequence of characters that define a search pattern. Usually such patterns are used by string-searching algorithms for 'find' or 'find and replace' operations on strings, or for input validation.*/
|