Search array by value in key and get another key's value - php

Question

here is my array:
[0] => Array
(
[messages] => Array
(
[0] => Array
(
[message] => This is for sandwich
)
[1] => Array
(
[message] => This message is for burger
)
)
[price] => Array
(
[amount] => 5
[currency] => USD
)
[1] => Array
(
[messages] => Array
(
[0] => Array
(
[message] => This is a message for a delicious hotdog
)
)
[price] => Array
(
[amount] => 3
[currency] => USD
)
)
i want to search in ALL arrays and I want to search for the word "burger". I want to get the price and amount of "burger" which is 5. If I search for the word "hotdog", it will return the price amount 3. How can i do that? thanks

Answer 1

You can use a foreach loop and then use strpos or stripos.
foreach ($array as $row) {
foreach ($row['messages'] as $row2) {
if(strpos($row2['message'], 'burger') !== false) {
$stringFound = true;
} else {
$stringFound = false;
}
}
if($stringFound === true) {
$price = $row['price']['amount'];
} else {
$price = '0';
}
}
echo $price;

Answer 2

If $array be your array. I Think It may Work.
<?php
$check = 'hotdog';
foreach($array as $products){
foreach($products['messages'] as $messages){
if (strpos($messages['message'], $check) !== false) {
echo $check.' Found. Price'. $products['price']['amount'] .'</br>' ;
}
}
}
?>

Answer 3

Here we are using array_column, implode and preg_match.
1. array_column for retrieving specific column of an array
2. implode joins a array with a glue to make it string.
3. preg_match here for matching specific word in the given string.
Try this code snippet here
$toSearch="hotdog";
foreach($array as $key => $value)
{
if(preg_match("/\b$toSearch\b/",implode(",",array_column($value["messages"],"message"))))
{
echo $value["price"]["amount"];
}
}

Answer 4

Because you are searching for the first qualifying price only, it is best practice to use a conditional break to short circuit the loops. There is no reason to do more cycles if you have found a qualifying entry.
Instantiate the $amount variable with a null value before the loop to properly distinguish between a successful search and an unsuccessful one.
str_contain() is the modern function to case-sensitively search for a substring (PHP7.4 and higher). If you need case-insensitivity, you will need to use stripos($message['message'], $needle) !== false. If you need to match whole words, you will need to call preg_match("/\b$needle\b/i", $message['message']). If using regex and the $needle is coming from user input, you will need to apply escaping beforehand with $needle = preg_quote($needle, '/');.
Code: (Demo)
$needle = 'burger';
$amount = null;
foreach ($haystack as ['messages' => $messages, 'price' => $price]) {
foreach ($messages as $message) {
if (str_contains($message['message'], $needle)) {
$amount = $price['amount'];
break;
}
}
}
var_export($amount);
// 5