image2wbmp – Output Image as WBMP in PHP
The article explains PHP's image2wbmp() function, detailing its parameters ($image, optional $filename, optional $threshold), return value, and how to output a WBMP image directly or save it to a file, and includes a complete code example.
image2wbmp() creates a WBMP file from an image resource, optionally saving to a filename or outputting directly to the browser.
Parameters:
$image (resource) – image resource created by functions such as imagecreatetruecolor() or imagecreatefrompng().
$filename (string, optional) – destination file name; if omitted, the image is sent directly to the output stream.
$threshold (int, optional) – threshold value for converting to black‑and‑white.
Return value: Returns true on success or false on failure.
Example:
The example loads a PNG image, sets the appropriate Content‑type header for WBMP, and outputs the WBMP image directly.
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