What are common reasons for a "Bad Request" error when making a cURL POST request in PHP?

A common reason for a "Bad Request" error when making a cURL POST request in PHP is incorrect formatting of the POST data. This can include not properly encoding the data or sending it in the wrong format. To solve this issue, ensure that the POST data is formatted correctly and encoded using `http_build_query()` function before sending the request. 

// Correctly format and encode the POST data before making the cURL request
$postData = http_build_query(array(
    'key1' => 'value1',
    'key2' => 'value2'
));

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, 'https://example.com/api');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);

$response = curl_exec($ch);

if($response === false){
    echo 'cURL error: ' . curl_error($ch);
}

curl_close($ch);

Keywords

cURL POST request PHP Bad Request Error

Related Questions