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<?php //PHPの関数 //様々な関数 $a[0] = "0"; $b = 0; //empty関数 /*以下の場合にTRUE ・空白の数値 ・NULLやFALSE ・変数が定義されただけの状態 ・文字列の半角の0 ・配列、数値の0 */ echo empty($a[0]).PHP_EOL; echo empty($b).PHP_EOL;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Jv8WX
function name:  (null)
number of ops:  10
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   ASSIGN_DIM                                               !0, 0
          1        OP_DATA                                                  '0'
    6     2        ASSIGN                                                   !1, 0
   16     3        ISSET_ISEMPTY_DIM_OBJ                         1  ~4      !0, 0
          4        CONCAT                                           ~5      ~4, '%0A'
          5        ECHO                                                     ~5
   17     6        ISSET_ISEMPTY_CV                                 ~6      !1
          7        CONCAT                                           ~7      ~6, '%0A'
          8        ECHO                                                     ~7
   18     9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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