How to check image exists on remote URL

 Sometimes we need to check the image link valid or invalid. So we have to solve this problem. In PHP we can check a link by curl. Executing curl get URL we can check a URL is valid or not. Also, we can use @getimagesize for image link validation.

Solution 1:  Using CURL

I have created the following function to check the image URL is valid or invalid. If we get a curl to execute the result then it is a valid image URL otherwise it is a broken URL.

function checkRemoteFile($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL,$url);
    // don't download content
    curl_setopt($ch, CURLOPT_NOBODY, 1);
    curl_setopt($ch, CURLOPT_FAILONERROR, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($ch);
    curl_close($ch);
    if($result !== FALSE)
    {
        return true;
    }
    else
    {
        return false;
    }
}

Solution 2: Using @getimagesize

It is very simple. I have created the following function to check the image URL.

function CheckImageLink($external_link){
    if (@getimagesize($external_link)) {
        return true;
    } else {
        return false;
    }
}