3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); $a["100"] = true; echo "\$a is an associative map: "; var_export($a); $keys = array_keys($a); echo "It has these keys: "; var_export($keys); var_dump( is_string($keys[0]) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/qFeQG
function name:  (null)
number of ops:  21
compiled vars:  !0 = $a, !1 = $keys
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        ASSIGN_DIM                                               !0, 100
          2        OP_DATA                                                  <true>
    4     3        ECHO                                                     '%24a+is+an+associative+map%3A+'
    5     4        INIT_FCALL                                               'var_export'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
    7     7        INIT_FCALL                                               'array_keys'
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                         $5      
         10        ASSIGN                                                   !1, $5
    8    11        ECHO                                                     'It+has+these+keys%3A+'
    9    12        INIT_FCALL                                               'var_export'
         13        SEND_VAR                                                 !1
         14        DO_ICALL                                                 
   11    15        INIT_FCALL                                               'var_dump'
         16        FETCH_DIM_R                                      ~8      !1, 0
         17        TYPE_CHECK                                   64  ~9      ~8
         18        SEND_VAL                                                 ~9
         19        DO_ICALL                                                 
         20      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
157.53 ms | 1386 KiB | 19 Q