79 lines
2 KiB
PHP
79 lines
2 KiB
PHP
<?php
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class UrlManipulator
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{
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private $paramsArray = ['param1', 'param2', 'param3', 'param4'];
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public function manipulateUrl($url)
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{
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if (!filter_var($url, FILTER_VALIDATE_URL)) {
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return ['error' => 'Invalid URL', 'input' => $url];
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}
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$parsedUrl = parse_url($url);
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$existingParams = [];
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if (isset($parsedUrl['query'])) {
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parse_str($parsedUrl['query'], $existingParams);
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}
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if (empty($this->paramsArray)) {
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return ['error' => 'Params array is full', 'input' => $url];
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}
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$newParam = $this->getNewParam($existingParams);
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if (!$newParam) {
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return ['error' => 'Unable to find a unique parameter to add', 'input' => $url];
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}
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$randomValue = $this->generateRandomValue();
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$modifiedUrl = $this->addParamToUrl($url, $newParam, $randomValue);
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return [
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'before' => $url,
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'after' => $modifiedUrl,
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];
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}
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private function addParamToUrl($url, $param, $value)
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{
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$separator = (parse_url($url, PHP_URL_QUERY) == null) ? '?' : '&';
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if (strpos($url, $param . '=') !== false) {
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$modifiedUrl = preg_replace('/(' . $param . '=)[^&]+/', '$1' . urlencode($value), $url);
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} else {
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$modifiedUrl = $url . $separator . urlencode($param) . '=' . urlencode($value);
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}
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return $modifiedUrl;
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}
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private function generateRandomValue()
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{
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return uniqid();
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}
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private function getNewParam($existingParams){
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while (!empty($this->paramsArray)) {
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$newParam = array_pop($this->paramsArray);
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if (!array_key_exists($newParam, $existingParams)) {
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return $newParam;
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}
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}
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return null;
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}
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}
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if ($_SERVER['REQUEST_METHOD'] === 'POST') {
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$urlManipulator = new UrlManipulator();
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$url = $_POST['url'];
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$result = $urlManipulator->manipulateUrl($url);
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header('Content-Type: application/json');
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echo json_encode($result);
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}
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