The PHP verification code is fine locally, but when it is placed on the server, the verification code is not displayed and an error is reported in the verification code line.

Question

<td align="left"><input type="text" name="vcode" id="vcode" style="width:54px" class="input"> <a href="javascript:change('vcode_img')"><img src="../vcode/?s=5577fcb7c5c7edc4107b069fd13ebcee" id="vcode_img" border="0" title="看不清？请点击更换" alt="" align="absmiddle" width="60" height="20"></a></td>

Answer 1

I want to know "../vcode/?s=5577fcb7c5c7edc4107b069fd13ebcee"

What is this