La cadena original es:<b>1234567890abcdefhijklmnñopqrstuvwxyzABCDEFGHIJKLMNÑOPQRSTUVWXYZ!·$%&()=?żáéíÇç{}</b><br />Sustituiremos: <b>\W</b> por: <b><span style='color:red;background-color:yellow'>A</span></b><br>El resultado será: <b>1234567890abcdefhijklmn<span style='color:red;background-color:yellow'>A</span>opqrstuvwxyzABCDEFGHIJKLMN<span style='color:red;background-color:yellow'>A</span>OPQRSTUVWXYZ<span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span><span style='color:red;background-color:yellow'>A</span></b>