How can i fetch a value in this array (php) - php

Question

i have a file with this array content (bottom) , how can i get a value ?
Array
(
[id_product] => 29438.199
[mojoodi] => 29.000000
[price] => 20000.0000
)
Array
(
[id_product] => 25912.199
[mojoodi] => 72.000000
[price] => 215000.0000
)
Array
(
[id_product] => 24617.199
[mojoodi] => 22.000000
[price] => 34900.0000
)
my code for put data in the file is :
$myfile = fopen("test.php", "w") or die("Unable to open file!");
for($i =0;$i<=50;$i++) {
$data = array("id_product"=>"$product_ids[$i]", "mojoodi"=>"$mojoodi[$i]", "price"=>"$price[$i]");
$results = print_r($data, true);
fwrite($myfile, $results);
}
fclose($myfile);

Answer 1

Don't use print_r() if you need to parse the data. Use JSON or serialize.
$array = array();
for($i =0;$i<=50;$i++) {
$array[] = array("id_product"=>"$product_ids[$i]", "mojoodi"=>"$mojoodi[$i]", "price"=>"$price[$i]");
}
file_put_contents("test.data", serialize($array));
Then when you want to read it back, you do:
$array = unserialize(file_get_contents("test.data"));

Answer 2

First of all your are overwritting $data by assigning value again and again to change the following line
$data = array("id_product"=>"$product_ids[$i]", "mojoodi"=>"$mojoodi[$i]", "price"=>"$price[$i]");
into
$data[] = array("id_product"=>"$product_ids[$i]", "mojoodi"=>"$mojoodi[$i]", "price"=>"$price[$i]");
Then you can get 2nd array's price index via following code.
echo $data[1]['price'];