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libphutil/src/parser/PhutilQueryStringParser.php
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PhutilQueryStringParser.php
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<?php
/**
* Parses a request string leaving all characters intact.
*
* http://php.net/manual/en/language.variables.external.php#language.variables.external.dot-in-names
* http://php.net/manual/en/language.variables.external.php#81080
*/
final class PhutilQueryStringParser {
public function parseQueryString($query_string) {
$parsed_arr = array();
$query_arr = array();
if (strlen($query_string)) {
$query_pairs = explode("&", $query_string);
foreach ($query_pairs as $query) {
$query_part_arr = explode("=", $query, 2);
if (strlen($query_part_arr[0])) {
$query_arr[] = array(
"key" => $query_part_arr[0],
"val" => isset($query_part_arr[1]) ? $query_part_arr[1] : "",
);
}
}
foreach ($query_arr as $query_parts) {
$decoded_key = urldecode($query_parts["key"]);
$decoded_val = urldecode($query_parts["val"]);
$this->parseQueryKeyToArr(
$decoded_key,
$decoded_val,
$parsed_arr);
}
}
return $parsed_arr;
}
/**
* Treats the key as a flat query that potentially has square brackets. If
* there are square brackets we parse them into an array.
*
* Example input:
* $key = "email[0]";
* $val = "my@example.com";
*
* Example output:
* array("email" => array(0 => "my@example.com"));
*
* @param string $key
* @param string $val
* @param array $input_arr
*/
private function parseQueryKeyToArr($key, $val, array &$input_arr) {
if (preg_match('/^[^\[\]]+(?:\[[^\[\]]*\])+$/', $key)) {
$key_pieces = preg_split('/\]?\[/', rtrim($key, "]"));
if ($key_pieces) {
$cursor = &$input_arr;
foreach ($key_pieces as $piece) {
if (strlen($piece)) {
if (empty($cursor[$piece]) || !is_array($cursor[$piece])) {
$cursor[$piece] = array();
}
} else {
$cursor[] = array();
$piece = last_key($cursor);
}
$cursor = &$cursor[$piece];
}
$cursor = $val;
unset($cursor);
}
} else {
$input_arr[$key] = $val;
}
}
}
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