PHP
Php
Arrays
Convertion
PHP automaticaly converts an unitialized array.
$x[] = 0;
$x['aa'] = 11;
var_dump($x); // array(2) { [0]=> int(0) ["aa"]=> int(11) }
$x = 1;
echo $x; // output 1
var_dump($x); // output int(1)
Keys
You can add an element to an array without specifying a key. PHP assigns a number > the greatest key.
$a = array (2 => 5);
$a[] = 'a'; // This will have a key of 3
$a = array ('4' => 5, 'a' => 'b');
$a[] = 44; // This will have a key of 5
$a = array (
'A' => 1,
'a' => 2,
'1' => 3,
1 => 4,
'01' => 5, // Only '1' is eq with 1
);
var_dump($a); // [A=>1, a=>2, 1=>3, 01=>5]
List
List constructor assign array's values to individual variables.
list($surname, $name, $age) =
["John", "Smith", "34", "07288333"];
echo "$surname $name is $age years old";
// Ouput: John Smith is 34 years old
$date = '25/05/2012';
list($day, $month, $year) = explode('/', $date);
echo $month; // 05
➥ Questions
