PHP property_exists() で問題が発生する
-
21-09-2019 - |
質問
やあ、みんな…以下のコードを実行すると、 if(property_exists(get_class($puzzleCharacters_encrypted), $solutionCharacter) false と評価され続けますが、その前の echo ステートメントは正しい情報を示しているため、プロパティは間違いなく存在します。何か足りないものはありますか?(PHPバージョン5.2.11)
$puzzle_solution = $currentPuzzleData->getVal("text");
$puzzle_encryption = "";
for ($i = 0; $i < strlen($puzzle_solution); $i++)
{
$solutionCharacter = substr($puzzle_solution, $i, 1);
echo ("\$solutionCharacter = " . $solutionCharacter . "<br />\n");
echo ("\$puzzleCharacters_encrypted->getVal(" . $solutionCharacter . ") = " . $puzzleCharacters_encrypted->getVal($solutionCharacter) . "<br />\n");
if (property_exists(get_class($puzzleCharacters_encrypted), $solutionCharacter))
{
$encryptionCharacter = $puzzleCharacters_encrypted->getVal($solutionCharacter);
$puzzle_encryption .= $encryptionCharacter;
}
else
{
$puzzle_encryption .= $solutionCharacter;
}
}
echo ("<br />\n" . $puzzle_solution);
echo ("<br />\n" . $puzzle_encryption);
ありがとう!
解決 2
...理由コードの答えとしてこれを投稿
class puzzleCharacters
{
public $char_a;
public $char_b;
public $char_c;
public $char_d;
public $char_e;
public $char_f;
public $char_g;
public $char_h;
public $char_i;
public $char_j;
public $char_k;
public $char_l;
public $char_m;
public $char_n;
public $char_o;
public $char_p;
public $char_q;
public $char_r;
public $char_s;
public $char_t;
public $char_u;
public $char_v;
public $char_w;
public $char_x;
public $char_y;
public $char_z;
public $char_A;
public $char_B;
public $char_C;
public $char_D;
public $char_E;
public $char_F;
public $char_G;
public $char_H;
public $char_I;
public $char_J;
public $char_K;
public $char_L;
public $char_M;
public $char_N;
public $char_O;
public $char_P;
public $char_Q;
public $char_R;
public $char_S;
public $char_T;
public $char_U;
public $char_V;
public $char_W;
public $char_X;
public $char_Y;
public $char_Z;
public $char_0;
public $char_1;
public $char_2;
public $char_3;
public $char_4;
public $char_5;
public $char_6;
public $char_7;
public $char_8;
public $char_9;
public function setVal($prop, $val)
{
$this->{"char_" . $prop} = $val;
//echo ("setting \$this->\$char_" . $prop . " as " . $val . "<br />\n");
}
public function getVal($prop)
{
//echo ("getting \$" . $prop . " as " . $this->{"char_" . $prop} . "<br />\n");
return ($this->{"char_" . $prop});
}
}
printrの出力($ puzzleCharacters_encrypted):
.puzzleCharacters Object ( [char_a] => x [char_b] => i [char_c] => y [char_d] => j [char_e] => o [char_f] => m [char_g] => p [char_h] => n [char_i] => v [char_j] => l [char_k] => w [char_l] => s [char_m] => u [char_n] => e [char_o] => f [char_p] => h [char_q] => q [char_r] => b [char_s] => k [char_t] => z [char_u] => a [char_v] => r [char_w] => t [char_x] => c [char_y] => d [char_z] => g [char_A] => X [char_B] => I [char_C] => Y [char_D] => J [char_E] => O [char_F] => M [char_G] => P [char_H] => N [char_I] => V [char_J] => L [char_K] => W [char_L] => S [char_M] => U [char_N] => E [char_O] => F [char_P] => H [char_Q] => Q [char_R] => B [char_S] => K [char_T] => Z [char_U] => A [char_V] => R [char_W] => T [char_X] => C [char_Y] => D [char_Z] => G [char_0] => 7 [char_1] => 5 [char_2] => 8 [char_3] => 0 [char_4] => 4 [char_5] => 6 [char_6] => 2 [char_7] => 3 [char_8] => 1 [char_9] => 9 )
他のヒント
二echo
文は、実際にそれが$solutionCharacter
が置かれている文字列を出力している、オブジェクトを照会されていません。これは、プロパティが実際に存在するという証拠はありません。
次に、あなたはclass
の$puzzleCharacters_encrypted
でプロパティを照会しています。これはよくプロパティはクラスではなく、オブジェクトに定義されていないことであってもよい。
あなたがしようとしたらどうなりますか。
if (property_exists($puzzleCharacters_encrypted, $solutionCharacter))
所属していません StackOverflow