php status code
100 => 'Continue',
101 => 'Switching Protocols',
102 => 'Processing', // WebDAV; RFC 2518
103 => 'Early Hints', // RFC 8297
200 => 'OK',
201 => 'Created',
202 => 'Accepted',
203 => 'Non-Authoritative Information', // since HTTP/1.1
204 => 'No Content',
205 => 'Reset Content',
206 => 'Partial Content', // RFC 7233
207 => 'Multi-Status', // WebDAV; RFC 4918
208 => 'Already Reported', // WebDAV; RFC 5842
226 => 'IM Used', // RFC 3229
300 => 'Multiple Choices',
301 => 'Moved Permanently',
302 => 'Found', // Previously "Moved temporarily"
303 => 'See Other', // since HTTP/1.1
304 => 'Not Modified', // RFC 7232
305 => 'Use Proxy', // since HTTP/1.1
306 => 'Switch Proxy',
307 => 'Temporary Redirect', // since HTTP/1.1
308 => 'Permanent Redirect', // RFC 7538
400 => 'Bad Request',
401 => 'Unauthorized', // RFC 7235
402 => 'Payment Required',
403 => 'Forbidden',
404 => 'Not Found',
405 => 'Method Not Allowed',
406 => 'Not Acceptable',
407 => 'Proxy Authentication Required', // RFC 7235
408 => 'Request Timeout',
409 => 'Conflict',
410 => 'Gone',
411 => 'Length Required',
412 => 'Precondition Failed', // RFC 7232
413 => 'Payload Too Large', // RFC 7231
414 => 'URI Too Long', // RFC 7231
415 => 'Unsupported Media Type', // RFC 7231
416 => 'Range Not Satisfiable', // RFC 7233
417 => 'Expectation Failed',
418 => 'I\'m a teapot', // RFC 2324, RFC 7168
421 => 'Misdirected Request', // RFC 7540
422 => 'Unprocessable Entity', // WebDAV; RFC 4918
423 => 'Locked', // WebDAV; RFC 4918
424 => 'Failed Dependency', // WebDAV; RFC 4918
425 => 'Too Early', // RFC 8470
426 => 'Upgrade Required',
428 => 'Precondition Required', // RFC 6585
429 => 'Too Many Requests', // RFC 6585
431 => 'Request Header Fields Too Large', // RFC 6585
451 => 'Unavailable For Legal Reasons', // RFC 7725
500 => 'Internal Server Error',
501 => 'Not Implemented',
502 => 'Bad Gateway',
503 => 'Service Unavailable',
504 => 'Gateway Timeout',
505 => 'HTTP Version Not Supported',
506 => 'Variant Also Negotiates', // RFC 2295
507 => 'Insufficient Storage', // WebDAV; RFC 4918
508 => 'Loop Detected', // WebDAV; RFC 5842
510 => 'Not Extended', // RFC 2774
511 => 'Network Authentication Required', // RFC 6585