解决Warning: unlink(/storage/cache/cache.catalog.language.1556158719): No such file or directory in /system/library/cache/file.php on line 68问题

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ytkah在调试opencart项目时提示Warning: unlink(/storage/cache/cache.catalog.language.1556158719): No such file or directory in /system/library/cache/file.php on line 68，出现这个问题首先确认是否权限不够，如果权限不够，可以把对应的文件夹设为777。以下是详细的解决方案

1.设置权限，/system/storage/和/image/设为755或777

chmod 0755 or 0777 system/storage/cache/
chmod 0755 or 0777 system/storage/download/
chmod 0755 or 0777 system/storage/logs/
chmod 0755 or 0777 system/storage/modification/
chmod 0755 or 0777 system/storage/session/
chmod 0755 or 0777 system/storage/upload/
chmod 0755 or 0777 system/storage/vendor/
chmod 0755 or 0777 image/
chmod 0755 or 0777 image/cache/
chmod 0755 or 0777 image/catalog/

2.清理缓存：extensions - modification - refresh
dashboard - cache右上角 - refresh
浏览器清理缓存：ctrl + f5强制刷新
3.如果还是出现那个提示，可以试试更新/system/library/cache/file.php文件

<?php
namespace Cache;
class File {
    private $expire;
    public function __construct($expire = 3600) {
        $this->expire = $expire;
        $files = glob(DIR_CACHE . 'cache.*');
        if ($files) {
            foreach ($files as $file) {
                $filename = basename($file);
                $time = substr(strrchr($file, '.'), 1);
                if ($time < time()) {
                    $this->delete(substr($filename, 6, strrpos($filename, '.') - 6));
                }
            }
        }
    }
    public function get($key) {
        $files = glob(DIR_CACHE . 'cache.' . basename($key) . '.*');
        if ($files) {
            $handle = fopen($files[0], 'r');
            flock($handle, LOCK_SH);
            $size = filesize($files[0]);
            if ($size > 0) {
                $data = fread($handle, $size);
            } else {
                $data = '';
            }
            flock($handle, LOCK_UN);
            fclose($handle);
            return json_decode($data, true);
        }
        return false;
    }
    public function set($key, $value) {
        $this->delete($key);
        $file = DIR_CACHE . 'cache.' . basename($key) . '.' . (time() + $this->expire);
        $handle = fopen($file, 'w');
        flock($handle, LOCK_EX);
        fwrite($handle, json_encode($value));
        fflush($handle);
        flock($handle, LOCK_UN);
        fclose($handle);
    }
    public function delete($key) {
        $files = glob(DIR_CACHE . 'cache.' . basename($key) . '.*');
        if ($files) {
            foreach ($files as $file) {
                if (!@unlink($file)) {
                    clearstatcache(false, $file);
                }
            }
        }
    }
}