Iterate images

• Extension version 1.6.0 or later;

• Build with --enable-reader;

Iterates every embedded image on a worksheet via a callback, exposing the binary content directly.

Methods

iterateImages(callable $callback, ?string $sheet = null): bool

callable $callback

Invoked once per image. Return false from the callback to stop iteration.

string $sheet

Worksheet name. When null, the currently openSheet()-ed worksheet is used.

Callback payload

The callback receives an associative array:

• from_row, from_col (int) — anchor start cell (0-based);

• to_row, to_col (int) — anchor end cell;

• mime (string) — MIME type, e.g. image/png, image/jpeg;

• data (string) — binary contents;

• name (string) — file name under xl/media/.

Return value

true on successful completion or callback-driven early exit; false on error (e.g. the worksheet could not be opened).

Example

$config = ['path' => './tests'];
$excel  = new \Vtiful\Kernel\Excel($config);

$excel->openFile('source.xlsx');

$excel->iterateImages(function (array $img) {
    echo "image at ({$img['from_row']}, {$img['from_col']}), MIME={$img['mime']}\n";
    file_put_contents('./out_' . $img['name'], $img['data']);
}, 'Sheet1');