lookbehind regex in PHP

Today, I was facing a problem how to split something like following text

a="Some Text" b="Some more Text" c="Even more text about \" this text\"" d="aaaaaaa"

into array, into pairs key => value. I couldn't just use explode(), because spaces could be inside the quotes..

After a little searching, I founded that solution lies in lookbehind regular expressions.. Nifty things ^_^

This

/(?<![\\\|=])\" /

expressions would split it into following array:

array (

  0 => 'a="Some Text',

  1 => 'b="Some more Text',

  2 => 'c="Even more text about \" this text\"',

  3 => 'd="aaaaaaa"',

)

so exactly what we wanted :)