Question

我有几行代码来生成一个普通的图像与一些给定的文字在PHP中。但是，当我给图像文字的宽度超出图像。如何将图像内的文字与固定宽度但动态高度对齐？我的代码如下。

header ("Content-type: image/png"); 
$string = 'Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industrys standard dummy text ever since the 1500s';            
$font = 4; 
$width = ImageFontWidth($font) * strlen($string); 
$height = ImageFontHeight($font); 

$im = @imagecreate (200,500); 
$background_color = imagecolorallocate ($im, 255, 255, 255); //white background 
$text_color = imagecolorallocate ($im, 0, 0,0);//black text 
imagestring ($im, $font, 0, 0, $string, $text_color); 
imagepng ($im); 

我希望这个图像根据给定的段落自动调整文本。怎么做？

Answer 1

你可以试试这个： （基于甘农的在http://php.net/manual/en/function.imagestring.php贡献）

header ("Content-type: image/png"); 
$string = "Lorem Ipsum is simply dummy\n text of the printing and typesetting industry. Lorem Ipsum has been the industrys standard dummy text ever since the 1500s"; 
$im = make_wrapped_txt($string, 0, 4, 4, 200); 
imagepng ($im); 

function make_wrapped_txt($txt, $color=000000, $space=4, $font=4, $w=300) { 
    if (strlen($color) != 6) $color = 000000; 
    $int = hexdec($color); 
    $h = imagefontheight($font); 
    $fw = imagefontwidth($font); 
    $txt = explode("\n", wordwrap($txt, ($w/$fw), "\n")); 
    $lines = count($txt); 
    $im = imagecreate($w, (($h * $lines) + ($lines * $space))); 
    $bg = imagecolorallocate($im, 255, 255, 255); 
    $color = imagecolorallocate($im, 0xFF & ($int >> 0x10), 0xFF & ($int >> 0x8), 0xFF & $int); 
    $y = 0; 
    foreach ($txt as $text) { 
    $x = (($w - ($fw * strlen($text)))/2); 
    imagestring($im, $font, $x, $y, $text, $color); 
    $y += ($h + $space); 
    } 
    return $im; 
} 

给予这种结果：