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How to convert request parameters from php array

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2023-04-19 09:15:27636browse

In PHP development, we often need to convert arrays into request parameters for data transmission. Converting PHP arrays into request parameters is a very common operation and an inevitable operation in PHP development. This article will introduce how to use functions in PHP to convert arrays into request parameters.

1. Use the http_build_query function

PHP has a built-in http_build_query function, which can be used to convert arrays into request parameters. The http_build_query function is used to convert an array into a query string after URL-encoding. Its basic syntax is as follows:

string http_build_query ( mixed $query_data [, string $numeric_prefix [, string $arg_separator [, int $enc_type = PHP_QUERY_RFC1738 ]]] )

Among them, query_data represents the array to be converted, and numeric_prefix is ​​optional, which means that the array is forced to be converted into The key name of a pure numeric index, arg_separator represents the separator between array elements, enc_type represents which character set is used for URL encoding, and the default is PHP_QUERY_RFC1738.

For example, we have the following array:

$data = array(
    'name' => 'Tom',
    'age' => 20,
    'gender' => 'male'
);

We can use the http_build_query function to convert it into request parameters in the following format:

name=Tom&age=20&gender=male

The specific usage is as follows:

$data = array(
    'name' => 'Tom',
    'age' => 20,
    'gender' => 'male'
);
$params = http_build_query($data);
echo $params;

2. Handwritten array to request parameter function

If we don’t want to use PHP’s built-in function, we can also handwrite a function to convert the array into request parameter. The following is a simple sample code:

function array2param($data)
{
    $params = array();
    foreach ($data as $key => $value) {
        if (is_array($value)) {
            $params[] = array2param($value);
        } else {
            $params[] = urlencode($key) . '=' . urlencode($value);
        }
    }
    return implode('&', $params);
}

We can call this function to convert the array into request parameters. The sample code is as follows:

$data = array(
    'name' => 'Tom',
    'age' => 20,
    'gender' => 'male'
);
$params = array2param($data);
echo $params;

The output result is as follows:

name=Tom&age=20&gender=male

3. Use http_build_query and array recursive traversal

Using http_build_query and array recursive traversal can be more convenient when processing multi-dimensional arrays. The following is the sample code:

function array2param($data) {
    $queryData = array();       // 将生成的字符串数组
    foreach ($data as $key => $value) {
        if (is_array($value)) {
            $queryData[] = http_build_query(array($key => $value));  // 处理多维数组
        } else {
            $queryData[] = urlencode($key) . '=' . urlencode($value);
        }
    }
    return implode('&', $queryData);
}

Usage example:

$data = array(
    'name' => 'Tom',
    'age' => 20,
    'gender' => 'male',
    'contact' => array(
        'email' => 'example@mail.com',
        'phone' => '1234567890'
    )
);
$params = array2param($data);
echo $params;

Output result:

name=Tom&age=20&gender=male&contact%5Bemail%5D=example%40mail.com&contact%5Bphone%5D=1234567890

Summary

In PHP, converting an array into a request parameter is A very common operation. This article introduces three different implementation methods, namely using http_build_query function, handwritten array to request parameter function and using http_build_query and array recursive traversal. Depending on the needs and actual situation, different methods can be chosen to handle it.

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