What you quote is probably from the doc, but as far as I know it's not necessarily true.
addslashes adds slashes to characters that are commonly disturbing. mysql_real_escape_string escapes whatever MySQL needs to be escaped. This may be more or less characters than what addslashes takes care of.
Also, mysql_real_escape_string will not necessarily add slashes to escape. While I think it works if you do it that way, recent versions of MySQL escape quotes by putting two of them together instead of by putting a slash before it.
I believe you should always use your data provider's escape function instead of addslashes, because addslashes may either do too much or not enough work for the purpose you use it. On the other hand, mysql_real_escape_string knows what to do to prepare a string for embedding it in a query. Even if the specs change about how to escape stuff and suddenly it's not backslashes that you should use anymore, your code will still work because mysql_real_escape_string will be aware of it.
Incrementing / Decrementing Operators
++ increment operator
-- decrement operator
Example Name Effect
---------------------------------------------------------------------
++$a Pre-increment Increments $a by one, then returns $a.
$a++ Post-increment Returns $a, then increments $a by one.
--$a Pre-decrement Decrements $a by one, then returns $a.
$a-- Post-decrement Returns $a, then decrements $a by one.
These can go before or after the variable.
If put before the variable, the increment/decrement operation is done to the variable first then the result is returned. If put after the variable, the variable is first returned, then the increment/decrement operation is done.
For example:
$apples = 10;
for ($i = 0; $i < 10; ++$i) {
echo 'I have ' . $apples-- . " apples. I just ate one.\n";
}
Live example
In the case above ++$i is used, since it is faster. $i++ would have the same results.
Pre-increment is a little bit faster because it really increments the variable and after that 'returns' the result. Post-increment creates a special variable, copies there the value of the first variable and only after the first variable is used, replaces its value with second's.
However, you must use $apples--, since first, you want to display the current number of apples, and then you want to subtract one from it.
You can also increment letters in PHP:
$i = "a";
while ($i < "c") {
echo $i++;
}
Once z is reached aa is next, and so on.
Note that character variables can be incremented but not decremented and even so only plain ASCII characters (a-z and A-Z) are supported.
Stack Overflow Posts:
Best Answer
Use
fputcsv()to write, andfgetcsv()to read.