Php preg_replace（）包含一个字符串*&引用；性格

我制作了一个脚本来突出显示字符串中的一个单词。脚本如下

function highlight_text($text, $words){
  $split_words = explode( " " , $words );
  foreach ($split_words as $word){
    $color = '#FFFF00';
    $text = preg_replace("|($word)|Ui", "<span style=\"background:".$color.";\">$1</span>", $text );
  }
  return $text;
}

$text = '*bc';
$words = '*';

echo highlight_text($text, $words);

---

有人能帮我吗？

将

“*”

更改为

“\*”

并获利。

您可以检查函数中的特殊字符是否突出显示\u文本

比如：

函数突出显示文本（$text，$words）{
$split_words=分解（“，$words）；
foreach（$word拆分为$word）{
$str=''；
$word=str_split（$word）；
foreach（$c）{
如果（$c=='*'））{
$str.='\*'；
}
否则{
$str.=$c；
}
}
$color='#FFFF00'；
$text=preg_replace（“|（$str）| Ui”、“$1”、$text）；
}
返回$text；
}

将代码更改为

function highlight_text($text, $words){
    $split_words = explode( " " , $words );
    foreach ($split_words as $word){
        $color = '#FFFF00';
        $word = preg_quote($word, '/');
        $text = preg_replace("|$word|Ui", "<span style=\"background:".$color.";\">$0</span>", $text );
    }
    return $text;
}

$text = '*bc';
$words = '*';

echo highlight_text($text, $words);

函数突出显示文本（$text，$words）{
$split_words=分解（“，$words）；
foreach（$word拆分为$word）{
$color='#FFFF00'；
$word=preg_quote（$word，“/”）；
$text=preg_replace（“|$word | Ui”、“$0”、$text）；
}
返回$text；
}
$text='*bc'；
$words='*'；
回显突出显示文本（$text，$words）；

然后就可以了。

这可以帮助您：

<?php
 function highlight_text($text, $words){
  $split_words = explode( " " , $words );
  foreach ($split_words as $key=>$word){
  if (preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $word))// looking for special characters
                 {
                    $word = preg_quote($word, '/');// if found output \ before that 
                          }
    $color = '#FFFF00';
    $text = preg_replace("|($word)|Ui", "<span style=\"background:".$color.";\">$1</span>", $text );
  }
  return $text;
}

$text = '*bc';
$words = '*';

echo highlight_text($text, $words);

---

尝试使用preg_quote（）转义“*”或单词，那么
word？
或
word+word
呢？或者word+word…？是的，我的代码有一个bug。一楼是对的。谢谢。word呢？还是单词+单词。。。？
function highlight_text($text, $words){
    $split_words = explode( " " , $words );
    foreach ($split_words as $word){
        $color = '#FFFF00';
        $word = preg_quote($word, '/');
        $text = preg_replace("|$word|Ui", "<span style=\"background:".$color.";\">$0</span>", $text );
    }
    return $text;
}

$text = '*bc';
$words = '*';

echo highlight_text($text, $words);

<?php
 function highlight_text($text, $words){
  $split_words = explode( " " , $words );
  foreach ($split_words as $key=>$word){
  if (preg_match('/[\'^£$%&*()}{@#~?><>,|=_+¬-]/', $word))// looking for special characters
                 {
                    $word = preg_quote($word, '/');// if found output \ before that 
                          }
    $color = '#FFFF00';
    $text = preg_replace("|($word)|Ui", "<span style=\"background:".$color.";\">$1</span>", $text );
  }
  return $text;
}

$text = '*bc';
$words = '*';

echo highlight_text($text, $words);