How do I Convert an Array to a Query String in PHP?

PHP Function for Building Query Strings from Array

PHP provides a built-in function for easily converting an array of key-value pairs into a query string. The function's name is http_build_query().

How to Use http_build_query()

The http_build_query() function takes an array as an argument and returns a string containing the formatted query string. The key-value pairs in the array are encoded as name-value pairs, separated by an equals sign and ampersand (&).

Here's an example:

<code class="php">$data = array(
    'name' => 'John Doe',
    'age' => 30,
    'gender' => 'male'
);

$query_string = http_build_query($data);

echo $query_string; // Outputs: name=John+Doe&age=30&gender=male</code>

Additional Parameters

The http_build_query() function also accepts several optional parameters:

• encoding: The character encoding to use (default: RFC 1738)
• numeric_prefix: Prefix to use for numeric array indices (default: none)
• arg_separator: Value separator used for array values (default: &)

Note:

The http_build_query() function is typically used to create query strings for HTTP requests. However, it can also be useful for other scenarios where you need to convert an array into a formatted string.

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