在$ _POST值中不使用引号vs单引号vs双引号 [英] using no quotes vs single quotes vs double quotes in $_POST value
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问题描述
Possible Duplicate:
Should I use php quote escapes for single quotes or use double quotes in arrays?
Is it okay to use array[key] in PHP?
这三个$ _POST值之间有什么区别? :
what is the difference between these three $_POST values? :
$_POST[data];
$_POST['data'];
$_POST["data"];
推荐答案
第一个,索引是常量data
.由于这可能是未定义的,PHP通常会将其转换为字符串'data'
并记录警告消息.
The first one, the index is the constant data
. Since that is likely undefined, PHP will often just convert it to the string 'data'
and log a warning message.
后两个都是相同的.索引是字符串'data'
.
The second two are both identical. The index is the string 'data'
.
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