php smyčka přes pole
$clothes = array("hat","shoe","shirt");
foreach ($clothes as $item) {
echo $item;
}
php foreach
$arr = ['Item 1', 'Item 2', 'Item 3'];
foreach ($arr as $item) {
var_dump($item);
}
php foreach
<?php
$age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
foreach($age as $x => $val) {
echo "$x = $val<br>";
}
?>
php pole
#Arrays
<?php
#array is a variable that holds multiple values
/*
Three types of arrays
- Indexed
- associative
- Multi-dimensional
*/
// Indexed array is the most common and easiest
$people = array('Kevin', 'Jeremy ', 'Sara');
$ids = array(23, 55, 12);
$cars = ['Honda', ' Toyota', 'Ford']; // also an array
//add to an array
$cars[3] = ' Audi';
// you can use empty brackets and it will be added to the last one
$cars[] = ' Chevy';
echo $people[1];
echo $ids[1];
echo $cars[1];
echo $cars[3];
echo $cars[4];
echo count($cars);
//you can also print the entire array
print_r($cars);
//to look at data type
echo var_dump($cars);
//Associative Arrays key pairs
$people1 = array('Kevin' => 35, 'Jeremy' => 23, 'Sara' => 19);
$ids1 = array(23 => 'Kevin', 55 => 'Jeremy', 12 => 'Sara');
echo $people1['Kevin'];
echo $ids1[23];
//add to these types of arrays
$people1['Jill'] = 44;
echo $people1['Jill'];
print_r($people1);
var_dump($people1);
//Multi-Dimensional Arrays aka an array within an array
$cars2 = array(
array('Honda',20,10),
array('Toyota',30,20),
array('Ford',23,12)
);
echo $cars2[1][0];
?>
PHP array loop
foreach($array as $i => $item) {
echo $item[$i]['filename'];
echo $item[$i]['filepath'];
// $array[$i] is same as $item
}
php loop array
<?php
$arr = array(1, 2, 3, 4);
foreach ($arr as &$value) {
$value = $value * 2;
}
// $arr is now array(2, 4, 6, 8)
unset($value); // break the reference with the last element
?>