What is the correct syntax for passing key-value pairs in a URL in PHP?

When passing key-value pairs in a URL in PHP, you can use the `http_build_query()` function to convert an array of key-value pairs into a URL-encoded query string. This function takes an associative array as input and returns a string in the format key1=value1&key2=value2. This is useful when constructing URLs for API requests or passing data between different pages. 

// Define an associative array of key-value pairs
$data = array(
    'key1' => 'value1',
    'key2' => 'value2'
);

// Convert the array into a URL-encoded query string
$queryString = http_build_query($data);

// Append the query string to the base URL
$url = 'http://example.com/api?' . $queryString;

// Output the final URL
echo $url;

Keywords

PHP URL key-value pairs syntax passing

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