php - Accessing PHP array inside for loop

Question

Why does the following code return correctly when called explicitly for 1, but not when called in a for loop?

name: Granola price: 5.99
1 name: price:
2 name: price:

<?php
        echo "name: " . $data[1][p_name];
        echo " price: " . $data[1][price] . "<br />";

        for ($i = 1; $i <= count($data); $i++) {
            echo $i . " name: " . $data[i][p_name];
            echo " price: " . $data[i][price] . "<br />";
        }
?>

Answer 1

问题是您使用了 $data[i] 而不是 $data[$i]。PHP 变量以 $ 开头。

Answer 2

因为在循环中您引用的是常量，i而不是变量$i。$data[i]应该是$data[$i]。