How to use normal array addition in PHP

PHP is a very popular server-side scripting language. It can handle various data collections commonly used in web development, including arrays. Arrays are a key part of data processing in PHP and are variables that store multiple values ​​or data. In PHP, there are two types of arrays: indexed arrays and associative arrays. In this article, we will discuss how to use normal array addition in PHP.

In PHP, to use ordinary array addition, we need to follow the following steps:

The first step is to create an array. We can create arrays using PHP's array variables.

$array1 = array(1, 2, 3);
$array2 = array(4, 5, 6);

In the above code, we created two arrays, $array1 and $array2. Among them, the $array1 array contains 3 elements, whose values ​​are 1, 2, and 3 respectively; the $array2 array also contains 3 elements, whose values ​​are 4, 5, and 6 respectively.

The second step is to use the " " operator to merge arrays. Using the " " operator, elements in two arrays can be combined into one array.

$result = $array1 + $array2;

In the above code, the $result variable is the merged array. This array contains all elements in $array1 and $array2, but duplicate elements will only appear once. Because array elements are stored in key-value pairs, if the key values ​​of two arrays are the same, the later array will overwrite the previous array.

The third step is to output the merged array. We can use PHP's foreach loop to iterate through the array and output each element in the array.

foreach ($result as $value) {
    echo $value . " ";
}

The above code will iterate through the array $result and output each element in it. The output is 1 2 3 4 5 6.

If we want to keep duplicate elements, we can use the array_merge() function to merge arrays.

$result = array_merge($array1, $array2);

The above code will use the array_merge() function to merge the $array1 and $array2 arrays into a single array while retaining duplicate elements.

Summary:

In PHP, you can combine the elements in two arrays into one array using ordinary array addition. Ordinary array addition can be easily implemented by creating an array, using the " " operator, and outputting the combined array. If you need to keep duplicate elements, you can use the array_merge() function. Array operations in PHP are very convenient and help improve the efficiency of web development.

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