PHP 将字符串拆分为整数元素和字符串
我有一个字符串说:Order_num = "0982asdlkj"
我怎样才能把它分成 2 个变量，用数字元素，然后在 php 中用字母元素另一个变量?
How can I split that into the 2 variables, with the number element and then another variable with the letter element in php?
number 元素可以是 1 到 4 之间的任意长度，字母元素填充其余部分，使每个 order_num 总共有 10 个字符.
The number element can be any length from 1 to 4 say and the letter element fills the rest to make every order_num 10 characters long in total.
我找到了 php explode 函数......但不知道如何在我的情况下实现它，因为数字的数量在 1 到 4 之间，之后的字母是随机的，所以无法在特定字母处拆分.请尽可能具体的帮助！
I have found the php explode function...but don't know how to make it in my case because the number of numbers is between 1 and 4 and the letters are random after that, so no way to split at a particular letter. Please help as specifically as possible!
推荐答案
您可以使用 preg_split 使用 前瞻和后视:
print_r(preg_split('#(?<=d)(?=[a-z])#i', "0982asdlkj"));
印刷品
Array
(
[0] => 0982
[1] => asdlkj
)
这仅在字母部分确实只包含字母而没有数字时才有效.
This only works if the letter part really only contains letters and no digits.
更新:
只是为了澄清这里发生的事情:
Just to clarify what is going on here:
正则表达式查看每个位置，如果该位置之前有一个数字((?<=d))和之后的一个字母((?=[az]))，然后它匹配并且字符串在这个位置被拆分.整个事情不区分大小写(i).
The regular expressions looks at every position and if a digit is before that position ((?<=d)) and a letter after it ((?=[a-z])), then it matches and the string gets split at this position. The whole thing is case-insensitive (i).
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