Pushing text around.
I wanted to put various bits of text in the corners of an image so I created a function to accept a location in the image and then put a corner of the text (eg right,top) at that location. Rotation is not supported.
Inputs to the function are fairly standard. The align parameter is two characters R|M|L (right, middle, top)for x alignment and T|M|B (top, middle, bottom) for y alignment; eg "LT" meaning left, top. Omitting the align parameter displays nothing.
The function returns the size of the text block or false indicating failure.
<?php
function imagettfalign (&$im,$size,$x,$y,$col,$font,$text,$align='')
{
$box = imagettfbbox ($size,0,$font,$text) ;
if (!$box) return false ;
if ($align)
{
switch (strtoupper($align[0])) {
case 'L' : $tX = $x - $box[0] ; break ;
case 'R' : $tX = $x - $box[2] ; break ;
case 'M' : $tX = $x - $box[2]/2 ; break ;
default : return false ;
}
switch (strtoupper($align[1])) {
case 'B' : $tY = $y - $box[1] ; break ;
case 'T' : $tY = $y - $box[7] ; break ;
case 'M' : $tY = $y - $box[7]/2 ; break ;
default : return false ;
}
if (!imagettftext ($im,$size,0,$tX,$tY,$col,$font,$text)) return false ;
}
$r[0]=abs($box[2]) ;
$r[1]=abs($box[7]) ;
return $r ;
}
?>
An example (excluding font declarations, etc) would be:
<?php
$im = @imagecreatetruecolor(400,200) ;
$colBlack = imagecolorallocate($im,0, 0, 0);
$xy = imagettfalign ($im,12,200,100,$colBlack,$ttFont,"The middle",'MM') ;
?>
This will show "The middle" smack in the centre of the image.
Finally, apologies for the non-standard indentation. It's just the way I've been doing it for years...
