NULL stands for a variable without value. To check if a variable is NULL you can either use is_null($var) or the comparison ( === ) with NULL. ... <看更多>
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NULL stands for a variable without value. To check if a variable is NULL you can either use is_null($var) or the comparison ( === ) with NULL. ... <看更多>
前言. 開個玩笑大家別當真啊,PHP 真香。 之所以會有這篇比較基礎的文章,是因為去年在面試時,曾經被問到isset、empty、is_null 三者的差別,但當時 ... ... <看更多>
Using PHP's null: $value = null; $query->bind(':key', $value, ParameterType::NULL); MySQL: No data supplied for parameters in prepared ... ... <看更多>
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PHP's Null Coalescing Operator is useful here for accounting for the non-existing array key. Example of changed line:. ... <看更多>