PHP Retrieve minimum values in a 2D associative array [closed] - php

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I have the below array:
Array
(
[0] => Array
(
[id] => 1
[price1] => 16
[price2] => 10
[price3] => 3
)
[1] => Array
(
[id] => 2
[price1] => 19
[price2] => 2
[price3] => 6
)
[2] => Array
(
[id] => 3
[price1] => 14
[price2] => 32
[price3] => 1
)
)
I want to get the lower price from each row independent from the other rows. for example for id=1 the lower price is 3 and for id=2 the lower is 2 and so on. Any idea how to automate this.

Answer 1

Possible solution:
Demo
foreach($array as $item)
{
$lowestKey = '';
foreach($item as $key => $value)
{
if(strpos($key, 'price') === 0)
{
if($lowestKey == '')
{
$lowestKey = $key;
}
else
{
if($value < $item[$lowestKey])
{
$lowestKey = $key;
}
}
}
}
echo 'lowest for id ' . $item['id'] . ': ' . $item[$lowestKey];
}
The benefits of this method are:
The price keys don't have to be consecutive, or even numerical. Any key that begins with price is treated as a price.
There can be unlimited prices, it's not restricted to three.
Any other data stored in the array won't affect it or break anything. So for example if in future you added a description key, it won't affect the code or require any modifications.

Answer 2

Try this:
$newarray = array();
foreach ($array as $row)
{
$id = $row['id'];
unset($row['id']);
$newarray[$id] = min($row);
}
There you go. $newarray now contains the id => {lowest value} of each row.

Answer 3

$r = array_reduce($array, function(&$result, $item) {
$key = $item['id'];
unset($item['id']);
$result[$key] = min($item);
return $result;
});

Answer 4

Try the below:
$prices = array(0 => array ( 'id' => 1,
'price1' => 16,
'price2' => 10,
'price3' => 3
),
1 => array ( 'id' => 2,
'price1' => 19,
'price2' => 2,
'price3' => 6
),
2 => array ( 'id' => 3,
'price1' => 14,
'price2' => 32,
'price3' => 1
)
);
foreach($prices as $price) {
$tmp_arr = array(0=> $price['price1'], 1=> $price['price2'], 2=> $price['price3']);
sort($tmp_arr);
$arr_low_price = array('id'=> $price['id'], 'low_price' => $tmp_arr[0]);
print_r($arr_low_price);
echo '<br />';
}

Answer 5

Try may help:
$price = array();
foreach( $array as $key=>$each ){
$low = $each['price1'];
if( $each['price2'] < $low ){
$low = $each['price2'];
}
if( $each['price3'] < $low ){
$low = $each['price3'];
}
$price[$key] = $low;
}
print_r( $price );