我需要实现函数来检查路径和 url 是相对的、绝对的还是无效的(在语法上无效 - 不是资源是否存在)。我应该寻找哪些案例?
function check_path($dirOrFile) {
// If it's an absolute path: (Anything that starts with a '/'?)
return 'absolute';
// If it's a relative path:
return 'relative';
// If it's an invalid path:
return 'invalid';
}
function check_url($url) {
// If it's an absolute url: (Anything that starts with a 'http://' or 'https://'?)
return 'absolute';
// If it's a relative url:
return 'relative';
// If it's an invalid url:
return 'invalid';
}