PHP addslashes () function

Source: Internet
Author: User
Definition and usage

The Addslashes () function adds a backslash before the specified predefined character.

These predefined characters are:

Single quotation mark (') Double quotation mark (") backslash (\) NULL syntax
Addslashes (String)
Hints and Notes

Tip: This function can be used to prepare the appropriate string for strings stored in the database and for database query statements.

Note: By default, PHP instruction MAGIC_QUOTES_GPC is on, and automatically runs Addslashes () for all GET, POST, and COOKIE data. Do not use Addslashes () for strings that have been MAGIC_QUOTES_GPC escaped, because this results in double-layer escaping. You can use the function GET_MAGIC_QUOTES_GPC () to detect this situation.


In this case, we're going to add a backslash to the predefined characters in the string:

 "; Echo addslashes ($STR)." This is safe in a database query. ";? > Output:
Who ' s John Adams? This is the not safe in a database query. Who\ ' s John Adams? This is safe in a database query.
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