php regular expression php regular expression non php regular expression verification php regular expression

<code>/^\d{n}$/  :验证n位的数字
/^\d{n,}$/ :验证至少n位数字
/^\d{m,n}$/  :验证m-n位的数字
/^(0|[<span>1-9</span>][<span>0-9</span>]*)$/  :验证零和非零开头的数字
/^[0-9]+(.[0-9]{2})?$/ :验证有两位小数的数字
/^[0-9]+(.[0-9]{1,3})?$/ :验证有1-3位小数的数字
/^\+?[<span>1-9</span>][<span>0-9</span>]*$/  :验证大于零的正整数：
/^\d.?\d*$/          :验证大于零的数：</code>

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The above introduces PHP regular verification, including PHP and regular content. I hope it will be helpful to friends who are interested in PHP tutorials.