PHP 7.2 backwards compatibility, PHP 8.1 friendly.

Author: tcdent

README.markdown

@@ -5,7 +5,7 @@ https://github.com/tcdent/php-restclient
 
 Installation
 -----------
-Requires PHP 8.0 or above. Use [0.1.7](https://github.com/tcdent/php-restclient/releases/tag/0.1.7) for legacy versions of PHP. 
+Requires PHP 7.2 or above. Use [0.1.7](https://github.com/tcdent/php-restclient/releases/tag/0.1.7) for legacy versions of PHP. 
 
 ``` sh
 $ composer require tcdent/php-restclient

composer.json

@@ -17,7 +17,7 @@
         "issues": "http://github.com/tcdent/php-restclient/issues"
     }, 
     "require": {
-        "php": ">=8.0", 
+        "php": ">=7.2", 
         "ext-curl": "*", 
         "ext-json": "*"
     }, 

restclient.php

@@ -105,31 +105,31 @@ public function offsetUnset($key) : void {
     }
 
     // Request methods:
-    public function get(string $url, array|string $parameters=[], array $headers=[]) : RestClient {
+    public function get(string $url, $parameters=[], array $headers=[]) : RestClient {
         return $this->execute($url, 'GET', $parameters, $headers);
     }
 
-    public function post(string $url, array|string $parameters=[], array $headers=[]) : RestClient {
+    public function post(string $url, $parameters=[], array $headers=[]) : RestClient {
         return $this->execute($url, 'POST', $parameters, $headers);
     }
 
-    public function put(string $url, array|string $parameters=[], array $headers=[]) : RestClient {
+    public function put(string $url, $parameters=[], array $headers=[]) : RestClient {
         return $this->execute($url, 'PUT', $parameters, $headers);
     }
 
-    public function patch(string $url, array|string $parameters=[], array $headers=[]) : RestClient {
+    public function patch(string $url, $parameters=[], array $headers=[]) : RestClient {
         return $this->execute($url, 'PATCH', $parameters, $headers);
     }
 
-    public function delete(string $url, array|string $parameters=[], array $headers=[]) : RestClient {
+    public function delete(string $url, $parameters=[], array $headers=[]) : RestClient {
         return $this->execute($url, 'DELETE', $parameters, $headers);
     }
 
-    public function head(string $url, array|string $parameters=[], array $headers=[]) : RestClient {
+    public function head(string $url, $parameters=[], array $headers=[]) : RestClient {
         return $this->execute($url, 'HEAD', $parameters, $headers);
     }
 
-    public function execute(string $url, string $method='GET', array|string $parameters=[], array $headers=[]) : RestClient {
+    public function execute(string $url, string $method='GET', $parameters=[], array $headers=[]) : RestClient {
         $client = clone $this;
         $client->url = $url;
         $client->handle = curl_init();
@@ -187,7 +187,7 @@ public function execute(string $url, string $method='GET', array|string $paramet
         }
 
         if($client->options['base_url']){
-            if($client->url[0] !== '/' && !str_ends_with($client->options['base_url'], '/'))
+            if($client->url[0] !== '/' && substr($client->options['base_url'], -1) !== '/')
                 $client->url = '/' . $client->url;
             $client->url = $client->options['base_url'] . $client->url;
         }
@@ -218,7 +218,7 @@ public function parse_response($response) : void {
                 // Since we tokenize on \n, use the remaining \r to detect empty lines.
                 if(count($headers) > 0) break; // Must be the newline after headers, move on to response body
             }
-            elseif(str_starts_with($line, 'HTTP')){
+            elseif(strpos($line, 'HTTP') === 0){
                 // One or more HTTP status lines
                 $this->response_status_lines[] = trim($line);
             }
@@ -259,7 +259,7 @@ public function get_response_format() : string {
             "Response format could not be determined.");
     }
 
-    public function decode_response() : mixed {
+    public function decode_response(){
         if(empty($this->decoded_response)){
             $format = $this->get_response_format();
             if(!array_key_exists($format, $this->options['decoders']))