php - 替换字符串中长度为 40 或以上的单词

Question

我有以下代码:

$caption = $picture->getCaption();
$words = explode(" ", $caption);
foreach ($words as $word) {
    $string_length = strlen($word);
    if ($string_length > 40) {
        str_replace($word, '', $caption);
        $picture->setCaption($caption);
    }
}

但是，为什么这不会用删除的文字替换标题呢？

Answer 1

你需要这样做:

$caption = $picture->getCaption();
$words = explode(" ", $caption);
foreach ($words as $word)
{
  $string_length = strlen($word);
  if ($string_length > 40) {
       $picture->setCaption(str_replace($word, '', $caption));
   }
}