How can undefined constant errors in cUrl PHP code be resolved?

To resolve undefined constant errors in cURL PHP code, you need to enclose the constant names in quotes to treat them as strings. This ensures that PHP recognizes them as constants and does not throw an error.

// Before
curl_setopt($ch, CURLOPT_URL, BASE_URL);

// After
curl_setopt($ch, CURLOPT_URL, &#039;BASE_URL&#039;);

How can undefined constant errors in cUrl PHP code be resolved?

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