php 0 false
Now that we have 64 bit compilers using an int variable for booleans, there is *one* value which is FALSE (zero) and 2**64-1 values that are TRUE (everything ... , It returns False if it did not found anything, but 0 if it has found .... There's no sane way in PHP to detect data (int, str, etc) from failure (false, null).
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 php 0 false 相關參考資料
Boolean 布尔类型 - Manual - PHP
Now that we have 64 bit compilers using an int variable for booleans, there is *one* value which is FALSE (zero) and 2**64-1 values that are TRUE (everything ... https://www.php.net Booleans - Manual - PHP
Now that we have 64 bit compilers using an int variable for booleans, there is *one* value which is FALSE (zero) and 2**64-1 values that are TRUE (everything ... https://www.php.net Null vs. False vs. 0 in PHP - Stack Overflow
It returns False if it did not found anything, but 0 if it has found .... There's no sane way in PHP to detect data (int, str, etc) from failure (false, null). https://stackoverflow.com PHP 型の比較表 - Manual - PHP
FALSE はbooleanですが"false"は 文字列です。 注意: ... NAN であるということです)。 結果が NAN になる演算の例には sqrt(-1) や asin(2) そして acosh(0) があります。 http://php.net PHP 类型比较表- Manual - PHP
FALSE 是一个布尔值而"false" 是一个字符串。 Note: .... interally to an integer. Any string (that does not start with a number), when casted to an integer, will be 0. https://www.php.net php中0," ",null和false的区别- 可克技术 - CSDN博客
php中0, ,null和false的区别(2011-10-11 16:03:31)转载▽标签：结构体c语言v2成员变量字符串杂谈分类：PHPphp中很多还不懂php中0,,null和false ... https://blog.csdn.net PHP中比较0、false、null和""的"坑" - haitiancoder的笔记本 ...
比如像array_search，没找到返回false，找到了返回key，而key是可能为0的。 ... //test.php echo '0 == false: '; var_dump(0 == false); echo '0 ... https://segmentfault.com PHP判断和比较null、0、''、false的正确姿势- 歪麦博客
以下的表格显示了PHP 类型和比较运算符在松散和严格比较时的作用。 在使用这些表格之前，需要明白变量类型及它们的意义。例如， "42" 是一个 ... https://www.awaimai.com PHP的Null、False和0比較 - 老天尊的死期
PHP的Null、False和0比較. e-satis: Null means "nothing". The var has not been initialized. Null 意思是nothing。這個變數還沒被初始化。 False ... http://carlislebear.blogspot.c 【PHP】關於布林值TRUE FALSE - 老灰鴨的筆記本
在其他程式語言裡, 有另外的值可用來判斷是/否, 如1 代表TRUE, 0 代表FALSE. PHP 也支援/接受其他型別的變數用來在程式中判斷, 以下的變數值就等於FALSE:. http://oldgrayduck.blogspot.co |