My PHP Collection

ABSPATH or BASEPATH +

array list ( mixed $var1 [, mixed $... ] ) +

$info = array('coffee', 'brown', 'caffeine');

// Listing all the variables
list($drink, $color, $power) = $info;
echo "$drink is $color and $power makes it special.\n";

// Listing some of them
list($drink, , $power) = $info;
echo "$drink has $power.\n";

// Or let's skip to only the third one
list( , , $power) = $info;
echo "I need $power!\n";

// list() doesn't work with strings
list($bar) = "abcde";

PHP Routing Explained+

array_key_properties+

Definition and Usage

array_key_exists(key,array)

The array_key_exists() function checks an array for a specified key, and returns true if the key exists and false if the key does not exist.

Check if the key "Volvo" exists in an array:

$a=array("Volvo"=>"XC90","BMW"=>"X5");
if (array_key_exists("Volvo",$a))
  {
  echo "Key exists!";
  }
else
  {
  echo "Key does not exist!";
  }

if you skip the key when you specify an array, an integer key is generated, starting at 0 and increases by 1 for each value.

Check if the key "Toyota" exists in an array:

$a=array("Volvo"=>"XC90","BMW"=>"X5");
if (array_key_exists("Toyota",$a))
  {
  echo "Key exists!";
  }
else
  {
  echo "Key does not exist!";
  }

property_exists+

(PHP 5 >= 5.1.0, PHP 7)

property_exists — Checks if the object or class has a property

bool property_exists ( mixed $class , string $property )

class myClass {
    public $mine;
    private $xpto;
    static protected $test;

    static function test() {
        var_dump(property_exists('myClass', 'xpto')); //true
    }
}

var_dump(property_exists('myClass', 'mine'));   //true
var_dump(property_exists(new myClass, 'mine')); //true
var_dump(property_exists('myClass', 'xpto'));   //true, as of PHP 5.3.0
var_dump(property_exists('myClass', 'bar'));    //false
var_dump(property_exists('myClass', 'test'));   //true, as of PHP 5.3.0
myClass::test();

function_exists()+

method_exists+

(PHP 4, PHP 5, PHP 7)

method_exists — Checks if the class method exists

bool method_exists ( mixed $object , string $method_name )

$directory = new Directory('.');
var_dump(method_exists($directory,'read'));

output:
bool(true)

class_exists()+

foreach()+

The foreach construct provides an easy way to iterate over arrays. foreach works only on arrays and objects, and will issue an error when you try to use it on a variable with a different data type or an uninitialized variable. There are two syntaxes:

foreach (array_expression as $value)
    statement
foreach (array_expression as $key => $value)
    statement

The first form loops over the array given by array_expression. On each iteration, the value of the current element is assigned to $value and the internal array pointer is advanced by one (so on the next iteration, you'll be looking at the next element).

The second form will additionally assign the current element's key to the $key variable on each iteration.

It is possible to customize object iteration.

foreach() - php.net

implode()+