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run code in 200+ php & hhvm versions
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<?php parse_str("email=329819779%40qq.com&captcha=1111&mobile=&captcha=&fullname=&email2=&mobile2=&title=&password=&password_confirmation=&nationality=&address=&postalCode=&birthday=&language=", $output); var_dump($output);
based on PTJbd
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
array(14) { ["email"]=> string(16) "329819779@qq.com" ["captcha"]=> string(0) "" ["mobile"]=> string(0) "" ["fullname"]=> string(0) "" ["email2"]=> string(0) "" ["mobile2"]=> string(0) "" ["title"]=> string(0) "" ["password"]=> string(0) "" ["password_confirmation"]=> string(0) "" ["nationality"]=> string(0) "" ["address"]=> string(0) "" ["postalCode"]=> string(0) "" ["birthday"]=> string(0) "" ["language"]=> string(0) "" }