PHP - 如果单词出现修复，则为高亮行

Question

Hello I have a little problem

This is my current code

<?php
$str = trim($_POST['email']);
$str = nl2br($str); // insert <br /> before 
 


$str = preg_replace($whitelistPregReplace, '<span style="color:blue">$1$2$3</span>', $str);

echo $str;
?>

The problem is it hightlight the whole line if "1bird.one" occurs. I want hightlight whole line only if "bird.one" occurs, not fdsfsdfsdbird.onefdsfsd ocurs

Thanks for your help

Answer 1

You can use word boundaries (\b) to indicate the string should not be right next to other 'word' characters:

~(.*)\b(bird\.one)\b(.*)~im

This will match efgerv bird.one evwerg, but fail on rgbre 1bird.one erfrwf.

https://regex101.com/r/riUhdD/1