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                遵循以下規則: &emsp;&emsp;&emsp;&emsp;a.不能使用 `1/0` 代替 `true/false`,在 PHP 中,這是不相等的; &emsp;&emsp;&emsp;&emsp;b.不要使用非零的表達式、變量或者方法直接進行 `true/false` 判斷,而必須使用嚴格的完整 `true/false` 判斷; 如:不使用 `if ( $a )` 或者 `if ( checka() )` 而使用 `if ( FALSE != $a )` 或者 `if ( FALSE != check() )`。
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