Class Sabre\DAV\Exception\PreconditionFailed

`extends`	`Exception`

PreconditionFailed.

This exception is normally thrown when a client submitted a conditional request, like for example an If, If-None-Match or If-Match header, which caused the HTTP request to not execute (the condition of the header failed)

Exception implements Throwable
- Sabre\DAV\Exception
  - Sabre\DAV\Exception\PreconditionFailed

Methods
`public`	`__construct(string $message, string $header = null)` Create the exception. Create the exception. Overrides `Exception::__construct()`	#
`public`	`getHTTPCode(): int` Returns the HTTP statuscode for this exception. Returns the HTTP statuscode for this exception. Overrides `Sabre\DAV\Exception::getHTTPCode()`	#
`public`	`serialize(Server $server, DOMElement $errorNode)` This method allows the exception to include additional information into the WebDAV error response. This method allows the exception to include additional information into the WebDAV error response. Overrides `Sabre\DAV\Exception::serialize()`	#

Methods inherited from Sabre\DAV\Exception
`getHTTPHeaders()`

Methods inherited from Exception
`__wakeup(), getMessage(), getCode(), getFile(), getLine(), getTrace(), getPrevious(), getTraceAsString(), __toString()`

Properties
`public`	`string`	`$header = null`	#