3v4l.org

run code in 300+ PHP versions simultaneously
<?php $memoryUsage = memory_get_peak_usage(false); trim('a'); $memoryUsage = abs(memory_get_peak_usage(false) - $memoryUsage); var_dump($memoryUsage); $memoryUsage = memory_get_peak_usage(true); trim('a'); $memoryUsage = abs(memory_get_peak_usage(true) - $memoryUsage); var_dump($memoryUsage);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0SjGE
function name:  (null)
number of ops:  37
compiled vars:  !0 = $memoryUsage
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'memory_get_peak_usage'
          1        SEND_VAL                                                 <false>
          2        DO_ICALL                                         $1      
          3        ASSIGN                                                   !0, $1
    4     4        INIT_FCALL                                               'trim'
          5        SEND_VAL                                                 'a'
          6        DO_ICALL                                                 
    5     7        INIT_FCALL                                               'abs'
          8        INIT_FCALL                                               'memory_get_peak_usage'
          9        SEND_VAL                                                 <false>
         10        DO_ICALL                                         $4      
         11        SUB                                              ~5      $4, !0
         12        SEND_VAL                                                 ~5
         13        DO_ICALL                                         $6      
         14        ASSIGN                                                   !0, $6
    6    15        INIT_FCALL                                               'var_dump'
         16        SEND_VAR                                                 !0
         17        DO_ICALL                                                 
    8    18        INIT_FCALL                                               'memory_get_peak_usage'
         19        SEND_VAL                                                 <true>
         20        DO_ICALL                                         $9      
         21        ASSIGN                                                   !0, $9
    9    22        INIT_FCALL                                               'trim'
         23        SEND_VAL                                                 'a'
         24        DO_ICALL                                                 
   10    25        INIT_FCALL                                               'abs'
         26        INIT_FCALL                                               'memory_get_peak_usage'
         27        SEND_VAL                                                 <true>
         28        DO_ICALL                                         $12     
         29        SUB                                              ~13     $12, !0
         30        SEND_VAL                                                 ~13
         31        DO_ICALL                                         $14     
         32        ASSIGN                                                   !0, $14
   11    33        INIT_FCALL                                               'var_dump'
         34        SEND_VAR                                                 !0
         35        DO_ICALL                                                 
         36      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
143.14 ms | 1006 KiB | 17 Q