php - How can I split every space apart from when the space is within quotes? -


i know how split spaces array:

$array =  array_filter(preg_split('/\s+/',$a));

but if string $a has quotes want regex ignore spaces within.

for example:

string:

@ in txt "v=spf1 mx ip4:x.x.x.x ~all"

would split array parts:

  • @
  • in
  • txt
  • "v=spf1 mx ip4:x.x.x.x ~all" (don't mind if contains ' " ' or not)

preg_split

you can leverage pcre verbs skip , fail used discard patterns. idea discard within quotes, can use regex this:

".*?"(*skip)(*fail)|\s+

working demo

enter image description here

however, if want use " or ' can use regex:

(["']).*?\1(*skip)(*fail)|\s+  $keywords = preg_split("/([\"']).*?\1(*skip)(*fail)|\s+/", $a);

preg_match_all

on other hand, can use regex capture want using this:

(".*"|'.*?'|\s+)

working demo

$re = "/(\".*\"|'.*?'|\\s+)/";  $str = "@ in txt \"v=spf1 mx ip4:x.x.x.x ~all\" 'asdf asdf'";   preg_match_all($re, $str, $matches);

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