Question

I’m creating a mobile payment processing script for my site, and to validate the payment I have to grab a string from the providers site.

The string will be either “Valid” or “Invalid”

How can I pull this string from my own site?

Answer 1

If you want to check for a particular string in the HTML from a remote page based on the URL, you can use the following:

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://some.url.com");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($ch);
curl_close($ch);
if (strstr($output, "Valid")) {
    // The payment is valid
}
else {
    // The payment is invalid
}

Hope that helps.