Share 3 ways to convert ternary array to uniary array in PHP

A triple array in PHP refers to an array containing multiple elements, where each element itself is a small array containing three values. In some cases, it is necessary to convert such a three-element array into a one-element array, that is, combine all the small arrays into one large array. This article will introduce how to convert a three-element array into a one-element array in PHP.

1. Use the array_map function

The array_map function can perform specified operations on each element in the array and return a new array. We can use the array_map function to convert a three-element array into a one-element array. The specific code implementation is as follows:

<?php // 定义三元数组
$data = array(
    array(&#39;id&#39; => 1, 'name' => 'John', 'age' => 20),
    array('id' => 2, 'name' => 'Tom', 'age' => 23),
    array('id' => 3, 'name' => 'David', 'age' => 25)
);

// 定义一个回调函数，用于将小数组合并为大数组
function merge_arrays($arr) {
    return array_values($arr);
}

// 使用array_map函数将三元数组转为一元数组
$result = array_map('merge_arrays', $data);

// 输出结果
var_dump($result);
?>

In the above code, we define a three-element array $data, and define a callback function merge_arrays to merge the decimal groups into a large array. Then we call the array_map function and merge_arrays as the callback function. The array_map function passes each element in $data to the merge_arrays function and stores the return value in the $result array. Finally, we use the var_dump function to output the structure of the $result array.

2. Use foreach loop

In addition to the array_map function, we can also use the foreach loop to convert a three-element array into a one-element array. The specific code implementation is as follows:

<?php // 定义三元数组
$data = array(
    array(&#39;id&#39; => 1, 'name' => 'John', 'age' => 20),
    array('id' => 2, 'name' => 'Tom', 'age' => 23),
    array('id' => 3, 'name' => 'David', 'age' => 25)
);

// 定义一个空数组，用于保存结果
$result = array();

// 循环遍历三元数组
foreach ($data as $arr) {
    $result[] = array_values($arr);
}

// 输出结果
var_dump($result);
?>

In the above code, we define an empty array $result to save the converted results. We then use a foreach loop to iterate through each element in the triple array $data, and use the array_values ​​function to convert the small array to a one-element array, and then add it to the end of the $result array. Finally, we use the var_dump function to output the structure of the $result array.

Summary:

This article introduces two methods of converting a three-element array into a one-element array in PHP: using the array_map function and using the foreach loop. No matter which method is used, you need to define a callback function or loop through the array and merge the small arrays into a large array. Regarding the readability and performance of the code, you can choose the most suitable implementation method according to the specific situation.

The above is the detailed content of Share 3 ways to convert ternary array to uniary array in PHP. For more information, please follow other related articles on the PHP Chinese website!