override_function(3) [php man page]

OVERRIDE_FUNCTION(3)							 1						      OVERRIDE_FUNCTION(3)

override_function - Overrides built-in functions

SYNOPSIS

       bool override_function (string  $function_name, string  $function_args, string  $function_code)

DESCRIPTION

	Overrides built-in functions by replacing them in the symbol table.

PARAMETERS

	      o $function_name
		- The function to override.

	      o $function_args
		-  The	function  arguments,  as  a  comma  separated string.  Usually you will want to pass this parameter, as well as the $func-
		tion_code parameter, as a single quote delimited string. The reason for using single quoted strings, is to  protect  the  variable
		names from parsing, otherwise, if you use double quotes there will be a need to escape the variable names, e.g. $your_var.

	      o $function_code
		- The new code for the function.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      override_function(3) example

	      <?php
	      override_function('test', '$a,$b', 'echo "DOING TEST"; return $a * $b;');
	      ?>

PHP Documentation Group 												      OVERRIDE_FUNCTION(3)

ADDSLASHES(3)								 1							     ADDSLASHES(3)

addslashes - Quote string with slashes

SYNOPSIS

       string addslashes (string  $str)

DESCRIPTION

	Returns  a  string  with backslashes before characters that need to be escaped. These characters are single quote ( '), double quote ( "),
       backslash ( ) and NUL (the NULL byte).

	An example use of addslashes(3) is when you're entering data into string that is evaluated by PHP. For	example,  O'Reilly  is	stored	in
       $str, you need to escape $str. (e.g. eval("echo '".addslashes($str)."';"); )

	To  escape  database  parameters,  DBMS  specific  escape  function  (e.g. mysqli_real_escape_string(3) for MySQL or pg_escape_literal(3),
       pg_escape_string(3) for PostgreSQL) should be used for security reasons. DBMSes have differect escape specification for	identifiers  (e.g.
       Table name, field name) than parameters. Some DBMS such as PostgreSQL provides identifier escape function, pg_escape_identifier(3), but not
       all DBMS provides identifier escape API. If this is the case, refer to your database system manual for proper escaping method.

	If your DBMS doesn't have an escape function and the DBMS uses  to escape special chars, you might be able to use this function only when
       this  escape  method  is  adequate for your database. Please note that use of addslashes(3) for database parameter escaping can be cause of
       security issues on most databases.

	The PHP directive  magic_quotes_gpc was on by default before PHP 5.4, and it essentially ran addslashes(3) on all GET,	POST,  and  COOKIE
       data. Do not use addslashes(3) on strings that have already been escaped with magic_quotes_gpc as you'll then do double escaping. The func-
       tion get_magic_quotes_gpc(3) may come in handy for checking this.

PARAMETERS

	      o $str
		- The string to be escaped.

RETURN VALUES

	Returns the escaped string.

EXAMPLES

       Example #1

	      An addslashes(3) example

	      <?php
	      $str = "Is your name O'Reilly?";

	      // Outputs: Is your name O'Reilly?
	      echo addslashes($str);
	      ?>

SEE ALSO

       stripcslashes(3), stripslashes(3), addcslashes(3), htmlspecialchars(3), quotemeta(3), get_magic_quotes_gpc(3).

PHP Documentation Group 													     ADDSLASHES(3)