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<?php
/**
* Input validation utilities.
*
* @package Requests\Utilities
*/
namespace WpOrg\Requests\Utility;
use ArrayAccess;
use CurlHandle;
use Traversable;
/**
* Input validation utilities.
*
* @package Requests\Utilities
*/
final class InputValidator {
/**
* Verify that a received input parameter is of type string or is "stringable".
*
* @param mixed $input Input parameter to verify.
*
* @return bool
*/
public static function is_string_or_stringable($input) {
return is_string($input) || self::is_stringable_object($input);
}
/**
* Verify whether a received input parameter is usable as an integer array key.
*
* @param mixed $input Input parameter to verify.
*
* @return bool
*/
public static function is_numeric_array_key($input) {
if (is_int($input)) {
return true;
}
if (!is_string($input)) {
return false;
}
return (bool) preg_match('`^-?[0-9]+$`', $input);
}
/**
* Verify whether a received input parameter is "stringable".
*
* @param mixed $input Input parameter to verify.
*
* @return bool
*/
public static function is_stringable_object($input) {
return is_object($input) && method_exists($input, '__toString');
}
/**
* Verify whether a received input parameter is _accessible as if it were an array_.
*
* @param mixed $input Input parameter to verify.
*
* @return bool
*/
public static function has_array_access($input) {
return is_array($input) || $input instanceof ArrayAccess;
}
/**
* Verify whether a received input parameter is "iterable".
*
* @internal The PHP native `is_iterable()` function was only introduced in PHP 7.1
* and this library still supports PHP 5.6.
*
* @param mixed $input Input parameter to verify.
*
* @return bool
*/
public static function is_iterable($input) {
return is_array($input) || $input instanceof Traversable;
}
/**
* Verify whether a received input parameter is a Curl handle.
*
* The PHP Curl extension worked with resources prior to PHP 8.0 and with
* an instance of the `CurlHandle` class since PHP 8.0.
* {@link https://www.php.net/manual/en/migration80.incompatible.php#migration80.incompatible.resource2object}
*
* @param mixed $input Input parameter to verify.
*
* @return bool
*/
public static function is_curl_handle($input) {
if (is_resource($input)) {
return get_resource_type($input) === 'curl';
}
if (is_object($input)) {
return $input instanceof CurlHandle;
}
return false;
}
}