I am doing some tests moving from the function split to preg_split in this line of code
list($tag) = preg_split('/[ >]/', substr($chunk, 2 - $open), 2);
What exactly do the [] do? Can they be omitted?
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The Guy with The Hat
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Mohamed Farouk
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It allows any character in the set. That is the use of [] in RegEx (Regular Expressions).
Eg: /[ABC]/ will match any capital letter of "A", "B" or "C".
Take a look at some information at http://www.regexr.com/. That should help a lot. It also allows you to see what will be picked up by testing your own search text with expressions.
Brandon White
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`\s` is any whitespace character, not necessarily a space because newlines are included with that. – chris85 Sep 27 '15 at 19:02
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Edited, good catch. Thanks..! – Brandon White Sep 27 '15 at 19:03
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The [] chars define an char group. Any character in this group would be allowed.
So your code /[ >]/ allow a space or the > char. The / chars surround the regex expression.
=> Your regex split the input on every or >
Philipp
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