PHP：包裝的測試線長度

Question

如何測試塊是否超過圖像大小並將該文本包裝到下一行。不知道我是否甚至用我的if語句正確地做到這一點。

$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; 
} 

有了這個代碼，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 

我想發生的事情是這樣的：

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

我想我知道你想達到什麼。我沒有測試下面的代碼，所以它可能需要一些波蘭和重做/測試。但它應該給你一個良好的起點

<?php 
$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) { 
    $_start_bit = false; 
    // before anything else check if chunk is url 
    $color_to_draw = is_a_url($chunk) ? $linkcolor : $black; 
    // check if chunk is to long 
    if(strlen($chunk) > $image_width) { 
     // if there is allredy a word in the current line 
     // make the first bit $imagewidth - current line width 
     if ($start_x > 5) { 
      $_start_bit = substr($chunk, 0, ($image_width - $start_x)); 
      $chunk = str_replace($_start_bit, "", $chunk); 
     } 
     $_chunkbits = wordwrap($chunk, $image_width, "\n", true); 
     $_chunkbits = explode("\n", $_chunkbits); 
     if($_start_bit) { 
      array_unshift($_chunkbits, $_start_bit); 
     } 
     // loop bits and draw them 
     foreach ($_chunkbits as $bit) { 
      if($end_x + $bit > $image_width){ 
       $start_x = 5; 
       $start_y += 20; 
      } 
      $coords = imagettfbbox($fontsize, $angle, $font, $bit); 
      $end_x = $coords[0] + $coords[4] + 10; 
      imagettftext($im, $fontsize, $angle, $start_x, $start_y, $color_to_draw, $font, $bit); 
      $start_x += $end_x; 
     } 
     unset($_chunkbits); 
    } else { 
     if($end_x + $chunk > $image_width){ 
      $start_x = 5; 
      $start_y += 20; 
     } 
     $coords = imagettfbbox($fontsize, $angle, $font, $chunk); 
     $end_x = $coords[0] + $coords[4] + 10; 
     imagettftext($im, $fontsize, $angle, $start_x, $start_y, $color_to_draw, $font, $chunk); 
     $start_x += $end_x; 
    } 
} 

Answer 2

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

一個主要錯誤，$ end_x +（strlen的（ $ chunk）* $ charPXsize）> $ image_width 另一個錯誤，如果一行超過$ image_width會發生什麼？它會在下一行打印出來，但是無論如何都會太長。

Answer 3

我所做的是迭代字符串，每次檢查邊界框是否太寬。然後如果是這樣，插入一個新行並繼續，直到你消耗了所有的文本。然後一切都寫成一個大的字符串...

$chunks = explode(' ', $text); 
$wrappedText = ''; 
foreach ($chunks as $chunk) { 
    $coords = imagettfbbox($fontsize, $angle, $font, $wrappedText.' '.$chunk); 
    $width = $coords[2] - $coords[0]; 
    if ($width > $myMaxWidth) { 
     $wrappedText .= "\n" . $chunk; 
    } else { 
     $wrappedText .= ' ' . $chunk; 
    } 
} 
imagettftext(
    $im, 
    $fontsize, 
    $angle, 
    $start_x, 
    $start_y, 
    $color_to_draw, 
    $font, 
    $wrappedText 
); 

現在，請注意，這不會影響你對鏈接不同......但是，你總是可以在裏面添加的檢測方法，以確定確切位置的鏈接將被寫入，並與你的顏色覆蓋它，如果它的存在......

Answer 4

使用wordwrap，並通過它的第四個參數，$cut，作爲true迫使URL被打破。

Live example。