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php converting to boolean

程序员文章站 2022-03-30 08:49:31
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When converting to boolean, the following values are considered FALSE: the boolean FALSE itself the integer 0 (zero) the float 0.0 (zero) the empty string, and the string "0" an array with zero elements an object with zero member variables (PHP 4 only) the special type NULL (including unset variables) SimpleXML objects created from empty tags

Every other value is considered TRUE (including any resource).