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Php regular expression number + Chinese recognition

Source: Internet
Author: User
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A regular expression matching 8-digit numbers is written, & quot; bd {8} B & quot;. However, when matching, it is found that the input number + Chinese can pass, for example: 11111111 three. the input number + any character cannot pass. what is going on? How can this problem be solved? recognize the regular expressions of numbers in php

A regular expression matching 8-digit numbers is written, "/\ B \ d {8} \ B/". However, when matching, it is found that the input number + Chinese can pass. for example: 11111111 Zhang San. the input number + any character cannot pass. what is going on? How can this problem be solved?

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