How to create a regex that will match regardless of the sequence of characters?
Say I am requiring a user to input the certain words provided and he/will just input it on a textbox which will be validated regardless of order.I have been looking for answers for hours and I'm stuck :/
eg the words should be inputted are: foo, bar, green.
and I can still match it even if the order is bar green foo or green foo bar
I pretty much know the very basics of regex but I don't know how to match with this type of condition.. Any answers will be much appreciated!
这会检查输入中是否有这三个单词，而不是更多：
/^(?=.*bbarb)(?=.*bgreenb)(?=.*bfoob)(?:s*bw+bs*){3}$/s
simple answer: don't use regex.
Just explode() the input, and then check manually if the words are ok. A simple way to check if the input is good is this:
if(!array_diff(explode(' ', $input), $valid_words)) {
// input OK
}
use explode()
http://sandbox.phpcode.eu/g/59c57
<?php
$str = 'foo, bar, green';
$array = explode(',', $str);
print_r($array);
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