Add function minizeHTMLString()

MD_STD.php

@@ -340,4 +340,20 @@ public static function openssl_random_pseudo_bytes(int $length):string {
 
     }
 
+    /**
+     * Function for minimizing HTML, trimming each line.
+     *
+     * @param string $input Input.
+     *
+     * @return string
+     */
+    public static function minimizeHTMLString(string $input):string {
+
+        $input = \explode(PHP_EOL, $input);
+        $output = "";
+        foreach ($input as $line) $output .= \trim($line) . PHP_EOL;
+        return $output;
+
+    }
+
 }