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There are several potential solutions to this issue:

1. Increase the timeout value: You can use the CURLOPT_TIMEOUT option in cURL to specify a longer timeout period. For example:

   curlsetopt($ch, CURLOPTTIMEOUT, 30);

This sets the timeout to 30 seconds. You can try increasing this value to see if it resolves the issue.

1. Try a different User-Agent: Some websites may block requests from certain User-Agents, so you could try setting a different User-Agent in cURL. For example:

   curlsetopt($ch, CURLOPTUSERAGENT, 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36');

This sets the User-Agent to a Chrome browser on Windows. You can try using a different User-Agent to see if it helps.

1. Check for rate limiting: Some websites may limit the number of requests you can make within a certain time period. You can check if this is the case by adding a delay between requests using the sleep() function. For example:

   sleep(1); //add a one second delay between requests

This will pause the script for one second before making the next request.

1. Use a proxy: Some websites may block requests from certain IP addresses, so you may need to use a proxy to make your requests. You can use the CURLOPT_PROXY option in cURL to specify a proxy server. For example:

   curlsetopt($ch, CURLOPTPROXY, 'http://username:password@proxyserver.com:port');

This sets the proxy server to 'proxyserver.com' using the HTTP protocol and port number. You will need to replace 'username' and 'password' with your proxy credentials if required.

1. Contact the website owner: If none of the above solutions work, you could try contacting the website owner to see if there are any restrictions on scraping their data. They may be able to provide you with an API or other solution for accessing their data.