link rel parser for headers in shopify / github

headerparser.php

function returnHeaderArray($linkHeader) {

    $cleanArray = [];

    if (strpos($linkHeader, ',') !== false) {
        //Split into two or more elements by comma
        $linkHeaderArr = explode(',', $linkHeader);
    } else {
        //Create array with one element
        $linkHeaderArr[] = $linkHeader;
    }

    foreach ($linkHeaderArr as $linkHeader) {
        $cleanArray += [
            extractRel($linkHeader) => extractLink($linkHeader)
        ];
    }

    return $cleanArray;
}

function extractLink($element) {
    if (preg_match('/<(.*?)>/', $element, $match) == 1) {
        return $match[1];
    }
}

function extractRel($element) {
    if (preg_match('/rel="(.*?)"/', $element, $match) == 1) {
        return $match[1];
    }
}
        
        //This was coded during websummit :)