3v4l.org

run code in 300+ PHP versions simultaneously
<?php $city = 'Charlotte'; echo "$city: "; echo [ 'Charlotte'=>183, 'Tampa'=>220, 'Pittsburgh'=>222, 'Los Angeles'=>475 ][$city] ?: 0; echo "\n"; $city = 'Smallville'; echo "$city: "; echo @[ 'Charlotte'=>183, 'Tampa'=>220, 'Pittsburgh'=>222, 'Los Angeles'=>475 ][$city] ?: 0;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/QF737
function name:  (null)
number of ops:  20
compiled vars:  !0 = $city
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'Charlotte'
    3     1        NOP                                                      
          2        FAST_CONCAT                                      ~2      !0, '%3A+'
          3        ECHO                                                     ~2
    9     4        FETCH_DIM_R                                      ~3      <array>, !0
          5        JMP_SET                                          ~4      ~3, ->7
          6        QM_ASSIGN                                        ~4      0
          7        ECHO                                                     ~4
   11     8        ECHO                                                     '%0A'
   13     9        ASSIGN                                                   !0, 'Smallville'
   14    10        NOP                                                      
         11        FAST_CONCAT                                      ~6      !0, '%3A+'
         12        ECHO                                                     ~6
   16    13        BEGIN_SILENCE                                    ~7      
   20    14        FETCH_DIM_R                                      ~8      <array>, !0
         15        END_SILENCE                                              ~7
         16        JMP_SET                                          ~9      ~8, ->18
         17        QM_ASSIGN                                        ~9      0
         18        ECHO                                                     ~9
         19      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
157.07 ms | 1393 KiB | 13 Q