字符串替换特殊字符之间的单词[重复]

Question

$text_string = "One One One,One.One OneTwo, Onetwo .Onetwo TwoOne One";

我想用单独或特殊字符之间或字符串开头/结尾的“三”替换单词“一”。 有人有想法吗？

结果必须是：

$text_string = "Three Three Three,Three.Three OneTwo, Onetwo .Onetwo TwoOne Three";

Answer 1

您可以使用\b 来检查单词边界：

$str = 'One One One,One.One OneTwo, Onetwo .Onetwo';
$replaced = preg_replace('/\bOne\b/', 'Three', $str);
echo $replaced; // Three Three Three,Three.Three OneTwo, Onetwo .Onetwo TwoOne Three