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<?php $a=array(2,3,null,0,""); print_r(array_keys($a,null)); echo "\n"; $b=array(2,3,"",0,null); echo array_search(null, $b);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/PR3lp
function name:  (null)
number of ops:  16
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'print_r'
          2        INIT_FCALL                                               'array_keys'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 null
          5        DO_ICALL                                         $3      
          6        SEND_VAR                                                 $3
          7        DO_ICALL                                                 
    5     8        ECHO                                                     '%0A'
    6     9        ASSIGN                                                   !1, <array>
    7    10        INIT_FCALL                                               'array_search'
         11        SEND_VAL                                                 null
         12        SEND_VAR                                                 !1
         13        DO_ICALL                                         $6      
         14        ECHO                                                     $6
         15      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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