Php 替换长度大于等于40的字符串中的单词

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，为什么不将标题替换为删除的已修剪单词？

您需要指定替换内容：

$caption = str_replace($word, '', $caption);

我认为这样更好：

$caption = $picture->getCaption();
// explode them by spaces, filter it out
// get all elements thats just inside 40 char limit
// them put them back together again with implode
$caption = implode(' ', array_filter(explode(' ', $caption), function($piece){
    return mb_strlen($piece) <= 40;
}));
$picture->setCaption($caption);

$caption=$picture->getCaption（）；
//按空格分解，然后过滤掉
//获取刚好在40个字符限制内的所有元素
//他们在内爆的情况下把它们重新组合在一起
$caption=内爆（“”，数组过滤器（“”，$caption），函数（$piece）{
返回mb_strlen（$piece）setCaption（$caption）；

您需要这样做：

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

---

你必须这样做：

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

---

您正在替换但未存储ITI如果处理非ansi字符，strlen可能不够。