PHP:测试换行的行长

Question

如何测试 block 是否超过图像大小并将该文本换行到下一行。不确定我是否使用 if 语句正确执行此操作。

$text="Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem http://somelongurl.com/then-we-make-it-super-long-with-some-more/ Lorem Ipsum Lorem Ipsum Lorem Ipsum";

$string_chunks = explode(' ', $text);

foreach ($string_chunks as $chunk) {

    if($end_x + $chunk > $image_width){
        $start_x = 5;
        $start_y += 20;
    }

   $coords = imagettfbbox($fontsize, $angle, $font, $chunk);

   $end_x = $coords[0] + $coords[4] + 10;

   $color_to_draw = is_a_url($chunk) ? $linkcolor : $black; 

   imagettftext($im, $fontsize, $angle, $start_x, $start_y, $color_to_draw, $font, $chunk);

   $start_x += $end_x;
}

通过这段代码我得到:

Lorem Ipsum Lorem Ipsum Lorem Ipsum Lorem 
http://somelongurl.com/then-we-make-it-super-long-with-some-more/
Lorem Ipsum Lorem Ipsum Lorem Ipsum

我希望发生的事情是这样的:

Lorem Ipsum Lorem Ipsum Lorem Ipsum 
Lorem http://somelongurl.com/then-we
-make-it-super-long-with-some-more/
Lorem Ipsum Lorem Ipsum Lorem Ipsum

Answer 1

使用 wordwrap 并将第四个参数 $cut 传递给它作为 true 以强制断开 URL。

Live example .