getCacheSquaredImages – square image cropping function

get_cache_images.php

<?php
/**
 * getCacheSquaredImages    square image cropping function
 *
 * (array) $imagesList      unassociated array of images with relative paths from the site root folder
 * (string) $pathCache      image cache folder path relative to the root folder of the site
 * (int) $sliderSquareSize  image full square size
 * (int) $thumbSqaureSize   image thumbnail square size
 *
 * retunt (array)           unassociated array, where each element is an array with relative folders 
 *                          of the root of the site paths and images: source image (key 'original'), 
 *                          full cropped image (key 'full'), thumbnail image (key 'thumb')
 */


define('PATH_ROOT', 'site root directory');

if (!function_exists('getCacheSquaredImages')) {
    function getCacheSquaredImages($imagesList, $pathCache, $sliderSquareSize, $thumbSqaureSize)
    {
        if (!is_array($imagesList) || !$imagesList) {
            return false;
        }

        $root = str_replace('\\', '/', PATH_ROOT);

        $result = [];

        foreach ($imagesList as $key => $imgIn) {
            $inPath = str_replace('\\', '/', $root . $imgIn);
            if (!file_exists($inPath)) {
                continue;
            }

            $fname = pathinfo($imgIn, PATHINFO_FILENAME);
            $outPathFull = str_replace('\\', '/', $root . $pathCache . $fname . '__sl.jpg');
            $outPathThumb = str_replace('\\', '/', $root . $pathCache . $fname . '__tmb.jpg');

            $fdir = pathinfo($outPathFull, PATHINFO_DIRNAME);
            if (!is_dir($fdir)) {
                mkdir($fdir, 0755, true);
            }

            $fdir = pathinfo($outPathThumb, PATHINFO_DIRNAME);
            if (!is_dir($fdir)) {
                mkdir($fdir, 0755, true);
            }

            $imgInfo = getimagesize($inPath);

            switch ($imgInfo[2]) {
                case IMAGETYPE_JPEG:
                case IMAGETYPE_JPEG2000:
                    $img = imagecreatefromjpeg($inPath);
                    break;
                case IMAGETYPE_PNG:
                    $img = imagecreatefrompng($inPath);
                    break;
                case IMAGETYPE_GIF:
                    $img = imagecreatefromgif($inPath);
                    break;
                case IMAGETYPE_WEBP:
                    $img = imagecreatefromwebp($inPath);
                    break;
                default:
                    $img = false;
            }

            if (!$img) {
                continue;
            }

            if ($imgInfo[0] == $imgInfo[1]) {
                $s = $imgInfo[0];
                $x = 0;
                $y = 0;
            } elseif ($imgInfo[0] > $imgInfo[1]) {
                $s = $imgInfo[1];
                $x = round(($imgInfo[0] / 2) - ($imgInfo[1] / 2));
                $y = 0;
            } else {
                $s = $imgInfo[0];
                $x = 0;
                $y = round(($imgInfo[1] / 2) - ($imgInfo[0] / 2));
            }

            $resultSl = false;
            if (file_exists($outPathFull)) {
                $resultSl = true;
            } else {
                $imgSl = imagecreatetruecolor($sliderSquareSize, $sliderSquareSize);
                if (imagecopyresampled($imgSl, $img, 0, 0, $x, $y, $sliderSquareSize, $sliderSquareSize, $s, $s)) {
                    imagejpeg($imgSl, $outPathFull, 70);
                    if (file_exists($outPathFull)) {
                        $resultSl = true;
                    }
                }
            }

            $resultTmb = false;
            if (file_exists($outPathThumb)) {
                $resultTmb = true;
            } else {
                $imgTmb = imagecreatetruecolor($thumbSqaureSize, $thumbSqaureSize);
                if (imagecopyresampled($imgTmb, $img, 0, 0, $x, $y, $thumbSqaureSize, $thumbSqaureSize, $s, $s)) {
                    imagejpeg($imgTmb, $outPathThumb, 70);
                    if (file_exists($outPathThumb)) {
                        $resultTmb = true;
                    }
                }
            }

            if ($resultSl && $resultTmb) {
                $result[$key]['original'] = str_replace($root, '', $inPath);
                $result[$key]['full'] = str_replace($root, '', $outPathFull);
                $result[$key]['thumb'] = str_replace($root, '', $outPathThumb);
            }
        }

        return $result;
    }
}