<?php
$json = '{"regex":["Hello\\\s+World"]}';
echo $obj1->regex[0]."<br>";
$obj2 = json_decode($json, true); //When assoc == TRUE, returned objects will be converted into associative arrays. echo $obj2["regex"][0];
?>
PD9waHAKJGpzb24gPSAneyJyZWdleCI6WyJIZWxsb1xcXHMrV29ybGQiXX0nOwoKJG9iajEgPSBqc29uX2RlY29kZSgkanNvbik7IAplY2hvICRvYmoxLT5yZWdleFswXS4iPGJyPiI7Cgokb2JqMiA9IGpzb25fZGVjb2RlKCRqc29uLCB0cnVlKTsgLy9XaGVuIGFzc29jID09IFRSVUUsIHJldHVybmVkIG9iamVjdHMgd2lsbCBiZSBjb252ZXJ0ZWQgaW50byBhc3NvY2lhdGl2ZSBhcnJheXMuCmVjaG8gJG9iajJbInJlZ2V4Il1bMF07Cj8+