Php – Insert image into TCPDF multicell

Incrementing / Decrementing Operators

++ increment operator

-- decrement operator

Example    Name              Effect
---------------------------------------------------------------------
++$a       Pre-increment     Increments $a by one, then returns $a.
$a++       Post-increment    Returns $a, then increments $a by one.
--$a       Pre-decrement     Decrements $a by one, then returns $a.
$a--       Post-decrement    Returns $a, then decrements $a by one.

These can go before or after the variable.

If put before the variable, the increment/decrement operation is done to the variable first then the result is returned. If put after the variable, the variable is first returned, then the increment/decrement operation is done.

For example:

$apples = 10;
for ($i = 0; $i < 10; ++$i) {
    echo 'I have ' . $apples-- . " apples. I just ate one.\n";
}

Live example

In the case above ++$i is used, since it is faster. $i++ would have the same results.

Pre-increment is a little bit faster because it really increments the variable and after that 'returns' the result. Post-increment creates a special variable, copies there the value of the first variable and only after the first variable is used, replaces its value with second's.

However, you must use $apples--, since first, you want to display the current number of apples, and then you want to subtract one from it.

You can also increment letters in PHP:

$i = "a";
while ($i < "c") {
    echo $i++;
}

Once z is reached aa is next, and so on.

Note that character variables can be incremented but not decremented and even so only plain ASCII characters (a-z and A-Z) are supported.

Stack Overflow Posts:

• Understanding Incrementing

I have found an answer here by Nicola Asuni, who is the main TCPDF author. The following code, provided by user fenstra, is working for me:

// Start clipping.      
$pdf->StartTransform();

// Draw clipping rectangle to match html cell.
$pdf->Rect($x, $y, $w, $h, 'CNZ');

// Output html.
$pdf->writeHTMLCell($w, $h, $x, $y, $html);

// Stop clipping.
$pdf->StopTransform();

As far as I can tell, the clipping rectangle won't consider any padding on the displayed text, so you apply the proper math to Rect's width and height if you need to mimic the behaviour of a MultiCell on this particular.