Loop in a multidimensional array and its subarray with PHP - php

Question

I've the following array:
$items = array(
array(
'name' => 'Item 1',
'desc' => 'Lorem ipsum...',
'rates' => array(
'Yes' => 50,
'No' => 75
)
),
array(
'name' => 'Item 2',
'desc' => 'Lorem ipsum...',
'rates' => array(
'Yes' => 50,
'No' => 0
)
)
);
How can I loop between the rates ?
Here what I tried:
foreach ($items as $item) {
foreach($item['rates'] as $rate => $value){
echo $rate['rates'];
}
}
Thanks.

Answer 1

change your code to
foreach ($items as $item) {
foreach($item['rates'] as $rate => $value){
echo $value;echo '<br/>';
}
}
in second loop $rate is key and $value have the current value of that key.

Answer 2

To keep (and continue) your work:
foreach ($items as $item) {
echo "Number of ratings for item: {$item['name']}<br/>";
foreach($item['rates'] as $rateKey => $rateValue) {
echo " - {$rateKey}: {$rateValue}<br/>";
}
}
Output:
Number of ratings for item: Item 1
- Yes: 50
- No: 75
Number of ratings for item: Item 2
- Yes: 50
- No: 0

Answer 3

foreach ($items as $item) {
foreach($item['rates'] as $rate => $value){
echo 'Rate is ' . $rate . '; value is ' . $value . '<br />';
}
}

Answer 4

Loop within loop is way slower than looping and it would only become noticeable when array that you're looping gets bigger. So one approach you could take is given below:
$items = array(
array(
'name' => 'Item 1',
'desc' => 'Lorem ipsum text',
'rates' => array(
'Yes' => 50,
'No' => 75
)
),
array(
'name' => 'Item 2',
'desc' => 'Lorem ipsum text',
'rates' => array(
'Yes' => 50,
'No' => 0
)
)
);
$rates = array_column($items, 'rates');
foreach($rates as $key => $value) {
if($value['Yes']) {
echo " Yes: {$value['Yes']}<br/>";
}
echo " No: {$value['No']}<br/><br/>";
}
Result:
Yes: 50
No: 75
Yes: 50
No: 0