How to catch cURL errors in PHP
You can use the curl_error() function to detect if there was some error. For example:
$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $your_url);curl_setopt($ch, CURLOPT_FAILONERROR, true); // Required for HTTP error codes to be reported via our call to curl_error($ch)//...curl_exec($ch);if (curl_errno($ch)) { $error_msg = curl_error($ch);}curl_close($ch);if (isset($error_msg)) { // TODO - Handle cURL error accordingly}See the description of libcurl error codes here
If CURLOPT_FAILONERROR is false, http errors will not trigger curl errors.
<?phpif (@$_GET['curl']=="yes") { header('HTTP/1.1 503 Service Temporarily Unavailable');} else { $ch=curl_init($url = "http://".$_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF']."?curl=yes"); curl_setopt($ch, CURLOPT_FAILONERROR, true); $response=curl_exec($ch); $http_status = curl_getinfo($ch, CURLINFO_HTTP_CODE); $curl_errno= curl_errno($ch); if ($http_status==503) echo "HTTP Status == 503 <br/>"; echo "Curl Errno returned $curl_errno <br/>";}
you can generate curl error after its execution
$url = 'http://example.com';$ch = curl_init($url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);$result = curl_exec($ch);if(curl_errno($ch)){ echo 'Request Error:' . curl_error($ch);}and here are curl error code
if someone need more information about curl errors
<?php $error_codes=array( [1] => 'CURLE_UNSUPPORTED_PROTOCOL', [2] => 'CURLE_FAILED_INIT', [3] => 'CURLE_URL_MALFORMAT', [4] => 'CURLE_URL_MALFORMAT_USER', [5] => 'CURLE_COULDNT_RESOLVE_PROXY', [6] => 'CURLE_COULDNT_RESOLVE_HOST', [7] => 'CURLE_COULDNT_CONNECT', [8] => 'CURLE_FTP_WEIRD_SERVER_REPLY', [9] => 'CURLE_REMOTE_ACCESS_DENIED', [11] => 'CURLE_FTP_WEIRD_PASS_REPLY', [13] => 'CURLE_FTP_WEIRD_PASV_REPLY', [14]=>'CURLE_FTP_WEIRD_227_FORMAT', [15] => 'CURLE_FTP_CANT_GET_HOST', [17] => 'CURLE_FTP_COULDNT_SET_TYPE', [18] => 'CURLE_PARTIAL_FILE', [19] => 'CURLE_FTP_COULDNT_RETR_FILE', [21] => 'CURLE_QUOTE_ERROR', [22] => 'CURLE_HTTP_RETURNED_ERROR', [23] => 'CURLE_WRITE_ERROR', [25] => 'CURLE_UPLOAD_FAILED', [26] => 'CURLE_READ_ERROR', [27] => 'CURLE_OUT_OF_MEMORY', [28] => 'CURLE_OPERATION_TIMEDOUT', [30] => 'CURLE_FTP_PORT_FAILED', [31] => 'CURLE_FTP_COULDNT_USE_REST', [33] => 'CURLE_RANGE_ERROR', [34] => 'CURLE_HTTP_POST_ERROR', [35] => 'CURLE_SSL_CONNECT_ERROR', [36] => 'CURLE_BAD_DOWNLOAD_RESUME', [37] => 'CURLE_FILE_COULDNT_READ_FILE', [38] => 'CURLE_LDAP_CANNOT_BIND', [39] => 'CURLE_LDAP_SEARCH_FAILED', [41] => 'CURLE_FUNCTION_NOT_FOUND', [42] => 'CURLE_ABORTED_BY_CALLBACK', [43] => 'CURLE_BAD_FUNCTION_ARGUMENT', [45] => 'CURLE_INTERFACE_FAILED', [47] => 'CURLE_TOO_MANY_REDIRECTS', [48] => 'CURLE_UNKNOWN_TELNET_OPTION', [49] => 'CURLE_TELNET_OPTION_SYNTAX', [51] => 'CURLE_PEER_FAILED_VERIFICATION', [52] => 'CURLE_GOT_NOTHING', [53] => 'CURLE_SSL_ENGINE_NOTFOUND', [54] => 'CURLE_SSL_ENGINE_SETFAILED', [55] => 'CURLE_SEND_ERROR', [56] => 'CURLE_RECV_ERROR', [58] => 'CURLE_SSL_CERTPROBLEM', [59] => 'CURLE_SSL_CIPHER', [60] => 'CURLE_SSL_CACERT', [61] => 'CURLE_BAD_CONTENT_ENCODING', [62] => 'CURLE_LDAP_INVALID_URL', [63] => 'CURLE_FILESIZE_EXCEEDED', [64] => 'CURLE_USE_SSL_FAILED', [65] => 'CURLE_SEND_FAIL_REWIND', [66] => 'CURLE_SSL_ENGINE_INITFAILED', [67] => 'CURLE_LOGIN_DENIED', [68] => 'CURLE_TFTP_NOTFOUND', [69] => 'CURLE_TFTP_PERM', [70] => 'CURLE_REMOTE_DISK_FULL', [71] => 'CURLE_TFTP_ILLEGAL', [72] => 'CURLE_TFTP_UNKNOWNID', [73] => 'CURLE_REMOTE_FILE_EXISTS', [74] => 'CURLE_TFTP_NOSUCHUSER', [75] => 'CURLE_CONV_FAILED', [76] => 'CURLE_CONV_REQD', [77] => 'CURLE_SSL_CACERT_BADFILE', [78] => 'CURLE_REMOTE_FILE_NOT_FOUND', [79] => 'CURLE_SSH', [80] => 'CURLE_SSL_SHUTDOWN_FAILED', [81] => 'CURLE_AGAIN', [82] => 'CURLE_SSL_CRL_BADFILE', [83] => 'CURLE_SSL_ISSUER_ERROR', [84] => 'CURLE_FTP_PRET_FAILED', [84] => 'CURLE_FTP_PRET_FAILED', [85] => 'CURLE_RTSP_CSEQ_ERROR', [86] => 'CURLE_RTSP_SESSION_ERROR', [87] => 'CURLE_FTP_BAD_FILE_LIST', [88] => 'CURLE_CHUNK_FAILED'); ?>