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<?php $str = "1,234,456"; $str = preg_replace('/[^0-9.]/s', '', $str); //echo $str; echo number_format(round($str , 2),2,".",',');
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/pvLiE
function name:  (null)
number of ops:  19
compiled vars:  !0 = $str
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, '1%2C234%2C456'
   4     1        INIT_FCALL                                               'preg_replace'
         2        SEND_VAL                                                 '%2F%5B%5E0-9.%5D%2Fs'
         3        SEND_VAL                                                 ''
         4        SEND_VAR                                                 !0
         5        DO_ICALL                                         $2      
         6        ASSIGN                                                   !0, $2
   6     7        INIT_FCALL                                               'number_format'
         8        INIT_FCALL                                               'round'
         9        SEND_VAR                                                 !0
        10        SEND_VAL                                                 2
        11        DO_ICALL                                         $4      
        12        SEND_VAR                                                 $4
        13        SEND_VAL                                                 2
        14        SEND_VAL                                                 '.'
        15        SEND_VAL                                                 '%2C'
        16        DO_ICALL                                         $5      
        17        ECHO                                                     $5
        18      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0