Output an XBM image to browser or file

Description

imagexbm(GdImage $image, ?string $filename, ?int $foreground_color = null): bool

Outputs or save an XBM version of the given image.

Note: imagexbm() doesn't apply any padding, so the image width has to be a multiple of 8. This restriction does no longer apply as of PHP 7.0.9.

Parameters

image

A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().

filename

The path to save the file to, given as string. If null, the raw image stream will be output directly.

The filename (without the .xbm extension) is also used for the C identifiers of the XBM, whereby non alphanumeric characters of the current locale are substituted by underscores. If filename is set to null, image is used to build the C identifiers.

foreground_color

You can set the foreground color with this parameter by setting an identifier obtained from imagecolorallocate(). The default foreground color is black. All other colors are treated as background.

Return Values

Returns true on success or false on failure.

Caution

However, if libgd fails to output the image, this function returns true.

Changelog

Version	Description
8.0.0	`image` expects a GdImage instance now; previously, a valid `gd` resource was expected.
8.0.0	`foreground_color` is now nullable.
8.0.0	The fourth parameter, which was unused, has been removed.

Examples

Example #1 Saving an XBM file

<?php
// Create a blank image and add some text
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5,  'A Simple Text String', $text_color);

// Save the image
imagexbm($im, 'simpletext.xbm');

// Free up memory
imagedestroy($im);
?>

Example #2 Saving an XBM file with a different foreground color

<?php
// Create a blank image and add some text
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5,  'A Simple Text String', $text_color);

// Set a replacement foreground color
$foreground_color = imagecolorallocate($im, 255, 0, 0);

// Save the image
imagexbm($im, NULL, $foreground_color);

// Free up memory
imagedestroy($im);
?>