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<?php //PHPの関数 //様々な関数 $a =NULL; $b =FALSE; //empty関数 /*以下の場合にTRUE ・空白の数値 ・NULLやFALSE ・変数が定義されただけの状態 ・文字列の半角の0 ・文字列、配列、数値の0 */ echo empty($a).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/giJSV
function name:  (null)
number of ops:  9
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   ASSIGN                                                   !0, null
    6     1        ASSIGN                                                   !1, <false>
   17     2        ISSET_ISEMPTY_CV                                 ~4      !0
          3        CONCAT                                           ~5      ~4, '%0A'
          4        ECHO                                                     ~5
   18     5        ISSET_ISEMPTY_CV                                 ~6      !1
          6        CONCAT                                           ~7      ~6, '%0A'
          7        ECHO                                                     ~7
   19     8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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