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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?
what is the difference between these three $_POST values? :
$_POST[data];
$_POST['data'];
$_POST["data"];
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.The second two are both identical. The index is the string
'data'.