3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = ',1,2,,4,5,,,,6,,,,'; echo preg_replace('/,\K,+/', '', trim($string, ','));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HhXJI
function name:  (null)
number of ops:  12
compiled vars:  !0 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%2C1%2C2%2C%2C4%2C5%2C%2C%2C%2C6%2C%2C%2C%2C'
    4     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%2C%5CK%2C%2B%2F'
          3        SEND_VAL                                                 ''
          4        INIT_FCALL                                               'trim'
          5        SEND_VAR                                                 !0
          6        SEND_VAL                                                 '%2C'
          7        DO_ICALL                                         $2      
          8        SEND_VAR                                                 $2
          9        DO_ICALL                                         $3      
         10        ECHO                                                     $3
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
241.43 ms | 1013 KiB | 15 Q