docs: fix links

docs/06_Helper_functions/index.md

@@ -8,6 +8,8 @@ $this->getInput('your input name here');
 `getInput` will either return the value for your parameter
 or `null` if the parameter is unknown or not specified.
 
+[Defined in lib/BridgeAbstract.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/BridgeAbstract.php)
+
 # getKey
 The `getKey` function is used to receive the key name to a selected list
 value given the name of the list, specified in `const PARAMETERS`
@@ -39,6 +41,8 @@ $this->getKey('country');
 `getKey` will either return the key name for your parameter or `null` if the parameter
 is unknown or not specified.
 
+[Defined in lib/BridgeAbstract.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/BridgeAbstract.php)
+
 # getContents
 The `getContents` function uses [cURL](https://secure.php.net/manual/en/book.curl.php) to acquire data from the specified URI while respecting the various settings defined at a global level by RSS-Bridge (i.e., proxy host, user agent, etc.). This function accepts a few parameters:
 
@@ -55,13 +59,18 @@ $opts = array(CURLOPT_POST => 1);
 $html = getContents($url, $header, $opts);
 ```
 
+[Defined in lib/contents.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/contents.php)
+
 # getSimpleHTMLDOM
 The `getSimpleHTMLDOM` function is a wrapper for the 
 [simple_html_dom](https://simplehtmldom.sourceforge.io/) [file_get_html](https://simplehtmldom.sourceforge.io/docs/1.9/api/file_get_html/) function in order to provide context by design.
 
 ```PHP
 $html = getSimpleHTMLDOM('your URI');
 ```
+
+[Defined in lib/contents.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/contents.php)
+
 # getSimpleHTMLDOMCached
 The `getSimpleHTMLDOMCached` function does the same as the 
 [`getSimpleHTMLDOM`](#getsimplehtmldom) function,
@@ -76,6 +85,8 @@ This function allows to specify the cache duration with the second parameter.
 $html = getSimpleHTMLDOMCached('your URI', 86400); // Duration 24h
 ```
 
+[Defined in lib/contents.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/contents.php)
+
 # returnClientError
 The `returnClientError` function aborts execution of the current bridge
 and returns the given error message with error code **400**:
@@ -86,6 +97,8 @@ returnClientError('Your error message')
 
 Use this function when the user provided invalid parameter or a required parameter is missing.
 
+[Defined in lib/utils.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/utils.php)
+
 # returnServerError
 The `returnServerError` function aborts execution of the current bridge and returns the given error message with error code **500**:
 
@@ -96,6 +109,8 @@ returnServerError('Your error message')
 Use this function when a problem occurs that has nothing to do with the parameters provided by the user.
 (like: Host service gone missing, empty data received, etc...)
 
+[Defined in lib/utils.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/utils.php)
+
 # defaultLinkTo
 Automatically replaces any relative URL in a given string or DOM object
 (i.e. the one returned by [getSimpleHTMLDOM](#getsimplehtmldom)) with an absolute URL.
@@ -122,6 +137,8 @@ $html = defaultLinkTo($html, $this->getURI()); // Using bridge URL
 // <img src="https://www.github.com/rss-bridge/rss-bridge/blob/master/README.md">
 ```
 
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
+
 # backgroundToImg
 Replaces tags with styles of `backgroud-image` by `<img />` tags.
 
@@ -131,6 +148,8 @@ backgroundToImg(mixed $htmlContent) : object
 
 Returns a DOM object (even if provided a string).
 
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
+
 # extractFromDelimiters
 Extract the first part of a string matching the specified start and end delimiters.
 ```php
@@ -151,6 +170,8 @@ $extracted = extractFromDelimiters($string, $start, $end);
 // 'John Doe'
 ```
 
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
+
 # stripWithDelimiters
 Remove one or more part(s) of a string using a start and end delimiter.
 It is the inverse of `extractFromDelimiters`.
@@ -173,6 +194,8 @@ $cleaned = stripWithDelimiters($string, $start, $end);
 // 'foobar'
 ```
 
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
+
 # stripRecursiveHTMLSection
 Remove HTML sections containing one or more sections using the same HTML tag.
 
@@ -192,6 +215,8 @@ $cleaned = stripRecursiveHTMLSection($string, $tag_name, $tag_start);
 // 'foobar'
 ```
 
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
+
 # markdownToHtml
 Converts markdown input to HTML using [Parsedown](https://parsedown.org/).
 
@@ -234,6 +259,7 @@ $html = markdownToHtml($input);
 // </ul>
 ```
 
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
 
 # e
 The `e` function is used to convert special characters to HTML entities
@@ -244,7 +270,7 @@ e('0 < 1 and 2 > 1');
 
 `e` will return the content of the string escape that can be rendered as is in HTML
 
-[Defined in lib/html.php](../../lib/html.php)
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
 
 # truncate
 The `truncate` function is used to shorten a string if exceeds a certain length, and add a string indicating that the string has been shortened.
@@ -253,7 +279,7 @@ The `truncate` function is used to shorten a string if exceeds a certain length,
 truncate('Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed a neque nunc. Nam nibh sem.', 20 , '...');
 ```
 
-[Defined in lib/html.php](../../lib/html.php)
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
 
 # sanitize
 The `sanitize` function is used to remove some tags from a given HTML text.
@@ -272,7 +298,7 @@ sanitize($html, $tags_to_remove, $attributes_to_keep, $text_to_keep);
 
 This function returns a simplehtmldom object of the remaining contents.
 
-[Defined in lib/html.php](../../lib/html.php)
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
 
 # convertLazyLoading
 The `convertLazyLoading` function is used to convert onvert lazy-loading images and frames (video embeds) into static elements. It accepts the HTML content as HTML objects or string objects. It returns the HTML content with fixed image/frame URLs (same type as input).
@@ -286,8 +312,7 @@ $html = '<html>
 backgroundToImg($html);
 ```
 
-[Defined in lib/html.php](../../lib/html.php)
-
+[Defined in lib/html.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/html.php)
 
 # Json::encode
 The `Json::encode` function is used to encode a value as à JSON string.
@@ -300,7 +325,7 @@ $array = [
 Json::encode($array, true, true);
 ```
 
-[Defined in lib/utils.php](../../lib/utils.php)
+[Defined in lib/utils.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/utils.php)
 
 # Json::decode
 The `Json::decode` function is used to decode a JSON string into à PHP variable.
@@ -313,4 +338,4 @@ $json = '{
 Json::decode($json);
 ```
 
-[Defined in lib/utils.php](../../lib/utils.php)
+[Defined in lib/utils.php](https://github.com/RSS-Bridge/rss-bridge/blob/master/lib/utils.php)