如何对HTML php代码进行验证

Question

My question is about validation in html. At the moment, if I input 100 or 1000 it will work as intended.

This is my html code:

<tr>
    <th scope="row" colspan = "1"><font size="5">Number of Guests:</th>
    <td colspan = "2"><input type = "text" name = "guest" maxlength = "4" id="guest" 
    pattern="[0-9]{3,4}" title = "Number of guests must be more than 100 people."></td>
</tr>

My problem is that when I try to input 001 or 000 it still works. How can I counter that problem? Do I have to validate in php? Thank you for any comments or suggestions.

Answer 1

试试这将适用于数字

<input type = "number" name = "guest" min = "100" max="1000" id="guest" title = "Number of guests must be more than 100 people.">

Answer 2

使用KótaPéter的想法

pattern="^[1-9][0-9]{2,3}"

Answer 3

Try this pattern: ^(0?[1-9][0-9]{2}|[1-9][0-9]{3})$

this way you disallow input 0100,001,099,0099

Answer 4

使用以下代码仅获得所需的值。

   <input type = "text" name = "guest" maxlength = "4" id="guest" min="100" max="1000" pattern="^[1-9][0-9]*$" title = "Number of guests must be more than 100 people.">