3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $str= <<<STR %257B%2522content%2522%253A%257B%2522song_id%2522%253A73979307%252C%2522pid%2522%253A%25220%2522%252C%2522title%2522%253A%2522%255Cu4e03%255Cu8272%255Cu6865%2522%252C%2522artist_id%2522%253A73356857%252C%2522artist%2522%253A%2522FightingMan%2522%252C%2522all_artist_id%2522%253A%2522127857%2522%252C%2522all_artist%2522%253A%2522FightingMan%2522%252C%2522author%2522%253A%2522FightingMan%2522%252C%2522compose%2522%253A%2522%2522%252C%2522songwriting%2522%253A%2522%2522%252C%2522mixed%2522%253A%2522%2522%252C%2522arrangements%2522%253A%2522%2522%252C%2522language%2522%253A%2522%2522%252C%2522publishtime%2522%253A%2522%2522%252C%2522file_duration%2522%253A%252268%2522%252C%2522hot%2522%253A%25220%2522%252C%2522hot_listen%2522%253A%25220%2522%252C%2522ting_hot%2522%253A%25220%2522%252C%2522download_count%2522%253A%25220%2522%252C%2522likes%2522%253A%25220%2522%252C%2522style%2522%253A%2522%2522%252C%2522is_down%2522%253A%25221%2522%252C%2522is_zip%2522%253A%25220%2522%252C%2522is_charge%2522%253A%25220%2522%252C%2522price%2522%253A%25220%2522%252C%2522xrank%2522%253A%25220%2522%252C%2522del_status%2522%253A%25220%2522%252C%2522verify_status%2522%253A%25221%2522%252C%2522max_rate%2522%253A%2522320%2522%252C%2522info%2522%253A%2522%2522%252C%2522relate_song_ids%2522%253A%2522%2522%252C%2522ontop%2522%253A%25220%2522%252C%2522allow_cover%2522%253A%25221%2522%252C%2522type%2522%253A%25220%2522%252C%2522is_cover%2522%253A%25220%2522%252C%2522ext%2522%253A%2522%2522%252C%2522style_ids%2522%253A%2522%2522%252C%2522tag_ids%2522%253A%2522%2522%257D%252C%2522audio%2522%253A%257B%2522param%2522%253A%2522http%253A%255C%252F%255C%252Fbcs-sandbox.baidu.com%255C%252Fqukuauto%255C%252F0525ee3363f91cfa6ed55dc1c81ad97d.mp3%2522%257D%252C%2522type%2522%253A%2522song%2522%257D STR; $str1 = <<<STRR %7B%22content%22%3A%7B%22song_id%22%3A73979307%2C%22pid%22%3A%220%22%2C%22title%22%3A%22%5Cu4e03%5Cu8272%5Cu6865%22%2C%22artist_id%22%3A73356857%2C%22artist%22%3A%22FightingMan%22%2C%22all_artist_id%22%3A%22127857%22%2C%22all_artist%22%3A%22FightingMan%22%2C%22author%22%3A%22FightingMan%22%2C%22compose%22%3A%22%22%2C%22songwriting%22%3A%22%22%2C%22mixed%22%3A%22%22%2C%22arrangements%22%3A%22%22%2C%22language%22%3A%22%22%2C%22publishtime%22%3A%22%22%2C%22file_duration%22%3A%2268%22%2C%22hot%22%3A%220%22%2C%22hot_listen%22%3A%220%22%2C%22ting_hot%22%3A%220%22%2C%22download_count%22%3A%220%22%2C%22likes%22%3A%220%22%2C%22style%22%3A%22%22%2C%22is_down%22%3A%221%22%2C%22is_zip%22%3A%220%22%2C%22is_charge%22%3A%220%22%2C%22price%22%3A%220%22%2C%22xrank%22%3A%220%22%2C%22del_status%22%3A%220%22%2C%22verify_status%22%3A%221%22%2C%22max_rate%22%3A%22320%22%2C%22info%22%3A%22%22%2C%22relate_song_ids%22%3A%22%22%2C%22ontop%22%3A%220%22%2C%22allow_cover%22%3A%221%22%2C%22type%22%3A%220%22%2C%22is_cover%22%3A%220%22%2C%22ext%22%3A%22%22%2C%22style_ids%22%3A%22%22%2C%22tag_ids%22%3A%22%22%7D%2C%22audio%22%3A%7B%22param%22%3A%22http%3A%5C%2F%5C%2Fbcs-sandbox.baidu.com%5C%2Fqukuauto%5C%2F0525ee3363f91cfa6ed55dc1c81ad97d.mp3%22%7D%2C%22type%22%3A%22song%22%7D STRR; var_dump(urldecode($str1));
based on CCUGt
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/C91aM
function name:  (null)
number of ops:  9
compiled vars:  !0 = $str, !1 = $str1
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   ASSIGN                                                   !0, '%25257B%252522content%252522%25253A%25257B%252522song_id%252522%25253A73979307%25252C%252522pid%252522%25253A%2525220%252522%25252C%252522title%252522%25253A%252522%25255Cu4e03%25255Cu8272%25255Cu6865%252522%25252C%252522artist_id%252522%25253A73356857%25252C%252522artist%252522%25253A%252522FightingMan%252522%25252C%252522all_artist_id%252522%25253A%252522127857%252522%25252C%252522all_artist%252522%25253A%252522FightingMan%252522%25252C%252522author%252522%25253A%252522FightingMan%252522%25252C%252522compose%252522%25253A%252522%252522%25252C%252522songwriting%252522%25253A%252522%252522%25252C%252522mixed%252522%25253A%252522%252522%25252C%252522arrangements%252522%25253A%252522%252522%25252C%252522language%252522%25253A%252522%252522%25252C%252522publishtime%252522%25253A%252522%252522%25252C%252522file_duration%252522%25253A%25252268%252522%25252C%252522hot%252522%25253A%2525220%252522%25252C%252522hot_listen%252522%25253A%2525220%252522%25252C%252522ting_hot%252522%25253A%2525220%252522%25252C%252522download_count%252522%25253A%2525220%252522%25252C%252522likes%252522%25253A%2525220%252522%25252C%252522style%252522%25253A%252522%252522%25252C%252522is_down%252522%25253A%2525221%252522%25252C%252522is_zip%252522%25253A%2525220%252522%25252C%252522is_charge%252522%25253A%2525220%252522%25252C%252522price%252522%25253A%2525220%252522%25252C%252522xrank%252522%25253A%2525220%252522%25252C%252522del_status%252522%25253A%2525220%252522%25252C%252522verify_status%252522%25253A%2525221%252522%25252C%252522max_rate%252522%25253A%252522320%252522%25252C%252522info%252522%25253A%252522%252522%25252C%252522relate_song_ids%252522%25253A%252522%252522%25252C%252522ontop%252522%25253A%2525220%252522%25252C%252522allow_cover%252522%25253A%2525221%252522%25252C%252522type%252522%25253A%2525220%252522%25252C%252522is_cover%252522%25253A%2525220%252522%25252C%252522ext%252522%25253A%252522%252522%25252C%252522style_ids%252522%25253A%252522%252522%25252C%252522tag_ids%252522%25253A%252522%252522%25257D%25252C%252522audio%252522%25253A%25257B%252522param%252522%25253A%252522http%25253A%25255C%25252F%25255C%25252Fbcs-sandbox.baidu.com%25255C%25252Fqukuauto%25255C%25252F0525ee3363f91cfa6ed55dc1c81ad97d.mp3%252522%25257D%25252C%252522type%252522%25253A%252522song%252522%25257D'
   7     1        ASSIGN                                                   !1, '%257B%2522content%2522%253A%257B%2522song_id%2522%253A73979307%252C%2522pid%2522%253A%25220%2522%252C%2522title%2522%253A%2522%255Cu4e03%255Cu8272%255Cu6865%2522%252C%2522artist_id%2522%253A73356857%252C%2522artist%2522%253A%2522FightingMan%2522%252C%2522all_artist_id%2522%253A%2522127857%2522%252C%2522all_artist%2522%253A%2522FightingMan%2522%252C%2522author%2522%253A%2522FightingMan%2522%252C%2522compose%2522%253A%2522%2522%252C%2522songwriting%2522%253A%2522%2522%252C%2522mixed%2522%253A%2522%2522%252C%2522arrangements%2522%253A%2522%2522%252C%2522language%2522%253A%2522%2522%252C%2522publishtime%2522%253A%2522%2522%252C%2522file_duration%2522%253A%252268%2522%252C%2522hot%2522%253A%25220%2522%252C%2522hot_listen%2522%253A%25220%2522%252C%2522ting_hot%2522%253A%25220%2522%252C%2522download_count%2522%253A%25220%2522%252C%2522likes%2522%253A%25220%2522%252C%2522style%2522%253A%2522%2522%252C%2522is_down%2522%253A%25221%2522%252C%2522is_zip%2522%253A%25220%2522%252C%2522is_charge%2522%253A%25220%2522%252C%2522price%2522%253A%25220%2522%252C%2522xrank%2522%253A%25220%2522%252C%2522del_status%2522%253A%25220%2522%252C%2522verify_status%2522%253A%25221%2522%252C%2522max_rate%2522%253A%2522320%2522%252C%2522info%2522%253A%2522%2522%252C%2522relate_song_ids%2522%253A%2522%2522%252C%2522ontop%2522%253A%25220%2522%252C%2522allow_cover%2522%253A%25221%2522%252C%2522type%2522%253A%25220%2522%252C%2522is_cover%2522%253A%25220%2522%252C%2522ext%2522%253A%2522%2522%252C%2522style_ids%2522%253A%2522%2522%252C%2522tag_ids%2522%253A%2522%2522%257D%252C%2522audio%2522%253A%257B%2522param%2522%253A%2522http%253A%255C%252F%255C%252Fbcs-sandbox.baidu.com%255C%252Fqukuauto%255C%252F0525ee3363f91cfa6ed55dc1c81ad97d.mp3%2522%257D%252C%2522type%2522%253A%2522song%2522%257D'
   9     2        INIT_FCALL                                               'var_dump'
         3        INIT_FCALL                                               'urldecode'
         4        SEND_VAR                                                 !1
         5        DO_ICALL                                         $4      
         6        SEND_VAR                                                 $4
         7        DO_ICALL                                                 
         8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0