How to get only array values ​​in php

PHP is a popular server-side scripting language commonly used for developing web applications. In PHP, working with arrays is often necessary because it is a data structure with many uses and is ideal for storing and manipulating a group of related data. In actual development, sometimes you only need to get the value in the array without using the key name, so what should you do? This article will introduce you to several methods of getting array values.

1. Use index subscripts to obtain values

In PHP, you can use the index subscripts of the array to access array elements. Each element has a corresponding numeric index in the array, starting from 0, and the order in the array is consistent with the order of insertion. For example:

<?php $fruits = array("apple", "banana", "orange");
echo $fruits[0]; // 输出 "apple"
echo $fruits[1]; // 输出 "banana"
echo $fruits[2]; // 输出 "orange"
?>

uses the [] operator to obtain its corresponding value. Since indexing starts at 0, the first element in the array has index 0, the second element has index 1, and so on. Although this method is easy to understand, it is inconvenient if there are no numeric indexes in your array or the numeric indexes are discontinuous.

2. Use the list function to parse arrays

PHP provides the list() function, which can assign an array to a set of variables at one time. By default, the list function will take each element from a variable containing the array and assign it to the corresponding variable. Therefore, you can directly use the list function to get only the values ​​​​in the array, without considering the key name. For example:

<?php $fruits = array("apple", "banana", "orange");
list($fruit1, $fruit2, $fruit3) = $fruits;
echo $fruit1; // 输出 "apple"
echo $fruit2; // 输出 "banana"
echo $fruit3; // 输出 "orange"
?>

In this example, we assign the three elements in the $fruits array to $fruit1, $fruit2 respectively. and $fruit3 variables. This method is very flexible and can be used at any time. After saving the values ​​of the array to variables, you can perform other operations based on these values.

3. Use the array_values ​​function

The array_values() function in PHP can return all the values ​​in an array, but discard the key names. For example:

<?php $fruits = array("apple" => "red", "banana" => "yellow", "orange" => "orange");
$values = array_values($fruits);
print_r($values); // 输出 Array ( [0] => red [1] => yellow [2] => orange )
?>

In this example, the original array $fruits contains three elements, each element is a key/value pair. We then used the array_values() function to return a new array $values containing only three values ​​without keys. This method can easily convert an array containing key-value pairs into an array with only values.

4. Use foreach loop

The last method is to use the foreach loop in PHP to traverse the array and only take the value of the array. For example:

<?php $fruits = array("apple" => "red", "banana" => "yellow", "orange" => "orange");
foreach ($fruits as $value) {
    echo $value . "\n";
}
?>

In this example, we use a foreach loop to traverse the array $fruits, and assign the value of the current element to the variable $value in each loop, Finally, the $value variable is output. This method makes it easy to get the value of each element, regardless of their key names.

To summarize, to get the value of an array in PHP, you can use index subscript, list() function, array_values() function or foreach loop. Which method to choose depends on the specific situation. You can choose based on key names or key values, or use these methods at the same time to achieve better results.

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