Preliminary adition to transing the internet webring, and tweaks and optimization to previous code regarding javascript to php rewrite, more concise and legible code functions.

includes/common_webrings.inc.php

@@ -0,0 +1,40 @@
+<?php
+
+// Gets a file given an array with sources
+function getFile(array $source){
+    $selected_source = $source["sources"][$source["selected_source"]];
+
+    if ($selected_source["source"] === "local") {
+        $file = file_get_contents(__DIR__ . $selected_source["url"]);
+    } else if ($selected_source["source"] === "internet") {
+        $curl = curl_init($selected_source["url"]);
+        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+
+        $file = curl_exec($curl);
+
+        if ($file === false) {
+            echo "Error: " . curl_error($curl);
+            exit;
+        }
+
+        curl_close($curl);
+    }
+    return $file;
+}
+
+// Returns the given sub-string given a initial search pattern, and a final end pattern.
+function extractString(string $string,string $start_pattern, string $end_pattern) {
+    $start_pos = strpos($string,$start_pattern,strlen($start_pattern));
+    $end_pos = strpos($string,$end_pattern, $start_pos);
+
+    $extracted_string = substr($string, $start_pos, $end_pos - $start_pos);
+
+    return $extracted_string;
+}
+
+// Self-explanatory
+function scrapeWebsiteSites(array $source,string $start_pattern, string $end_pattern) {
+    $script = getFile($source);
+    $websites = extractString($script,$start_pattern,$end_pattern);
+    return $websites;
+}