Sets the filename before you read or write the image

# Gmagick::setfilename

(PECL gmagick >= Unknown)

Gmagick::setfilename — Sets the filename before you read or write the image

### Description

public Gmagick::setfilename(string `$filename`): Gmagick

Sets the filename before you read or write an image file.

### Parameters

`filename`
  The image filename.

### Return Values

The Gmagick object.

### Errors/Exceptions

Throws an GmagickException on error.

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