Here is a function with similar declaration of imagestring() but who handles whitespaces (It creates new lines and 4 spaces instead of \n and \t) and image's size limits
<?php
function whitespaces_imagestring($image, $font, $x, $y, $string, $color) {
$font_height = imagefontheight($font);
$font_width = imagefontwidth($font);
$image_height = imagesy($image);
$image_width = imagesx($image);
$max_characters = (int) ($image_width - $x) / $font_width ;
$next_offset_y = $y;
for($i = 0, $exploded_string = explode("\n", $string), $i_count = count($exploded_string); $i < $i_count; $i++) {
$exploded_wrapped_string = explode("\n", wordwrap(str_replace("\t", " ", $exploded_string[$i]), $max_characters, "\n"));
$j_count = count($exploded_wrapped_string);
for($j = 0; $j < $j_count; $j++) {
imagestring($image, $font, $x, $next_offset_y, $exploded_wrapped_string[$j], $color);
$next_offset_y += $font_height;
if($next_offset_y >= $image_height - $y) {
return;
}
}
}
}
?>
